Pennsylvania
Home › State by State › Pennsylvania › All systems

Pennsylvania system directory

Find a community water system

Search every Pennsylvania community water system with a current nitrate result. Open a system to see its latest reading, reporting date, nitrate band and population served.

1,840
systems with a current result
11,450,009
people served by them
170
systems carrying a supplier result
146
systems at or above 5 mg/L
How to read the directory: each system is placed in a band by its most recent reported result in the rolling three-year window. Purchased-water systems carry their supplier's result and are tagged. Bands describe how strongly human activity, read from nitrate, has marked a water source; they are not a safety verdict.
Filter by nitrate band
Showing 1,840 of 1,840 systems
A
A B C #2 Mobile Home ParkHuman impact likely2.62 mg/LMar 202675 servedAbraxas AcademyHuman impact likely1.02 mg/LApr 2026156 servedAcorn AcresHealth-study range7.70 mg/LJun 202650 servedAdams Cnty Fac CtrHuman impact likely2.29 mg/LDec 2025456 servedAdams Twp Municipal AuthorityNatural background0.00 mg/LApr 2026225 servedAdamstown BoroughHuman impact likely1.70 mg/LApr 20261,800 servedAddison Area Water AuthNatural background0.00 mg/LJul 2025284 servedAiken Water CompanyNatural background0.00 mg/LDec 2025850 servedAkron BoroughHealth-study range7.76 mg/LMay 20264,200 servedAlbert Gallatin Muni AuthNatural background0.00 mg/LApr 20262,695 servedAlbion BoroughNatural background0.00 mg/LAug 20255,842 servedAlburtis Borough AuthorityHuman impact clear3.05 mg/LApr 20262,117 servedAleppo Twp Authpurchased waterNatural background0.80 mg/LJan 20262,200 servedAlex Acres MhpNatural background0.00 mg/LJun 2026108 servedAlexandria Boro Water AuthNatural background0.00 mg/LJun 2026815 servedAllensville Muni AuthNatural background0.00 mg/LApr 2026480 servedAltoona Water AuthorityNatural background0.15 mg/LApr 202662,500 servedAmber Hill MhpHealth-study range5.28 mg/LMay 202670 servedAmblebrookHuman impact likely2.81 mg/LMay 2026450 servedAmbler Boro Water DeptHuman impact likely2.07 mg/LMay 202620,000 servedAmbridge Water AuthNatural background0.27 mg/LAug 202519,500 servedAmerican Modern HomesNatural background0.00 mg/LJan 2026100 servedAmerican Tempo Village ParkNatural background0.00 mg/LFeb 202688 servedAmes Trailer CourtNatural background0.26 mg/LSep 202534 servedAnchor EstatesNatural background0.46 mg/LAug 2025300 servedAntrim Township Municipal AuthHealth-study range5.28 mg/LMay 2026975 servedApple Blossom Lane MhpHuman impact likely2.90 mg/LApr 202531 servedAppleville Mobile Home Parkpurchased waterHuman impact clear4.00 mg/LMay 2025461 servedAqua Pa ApplewoodHuman impact likely2.00 mg/LMar 202595 servedAqua Pa BarrettNatural background0.00 mg/LMay 2025107 servedAqua Pa Beech MountainNatural background0.00 mg/LJun 20252,646 servedAqua Pa Bensalempurchased waterHuman impact clear4.00 mg/LJun 202659,001 servedAqua Pa BristolHuman impact likely2.90 mg/LMar 202628,727 servedAqua Pa Bunker HillNatural background0.00 mg/LApr 2025210 servedAqua Pa ChalfontHuman impact likely2.20 mg/LJun 20265,900 servedAqua Pa ClarendonNatural background0.00 mg/LMay 2026840 servedAqua Pa Country Club GardensHuman impact clear3.30 mg/LJun 2025268 servedAqua Pa Crawford DivNatural background0.00 mg/LJun 20262,300 servedAqua Pa Eagle Rock UtilitiesNatural background0.00 mg/LJun 2025956 servedAqua Pa East CameronHuman impact likely2.20 mg/LApr 2025200 servedAqua Pa East Pikelandpurchased waterHuman impact likely2.85 mg/LMay 2026675 servedAqua Pa East PointeHuman impact clear3.00 mg/LJul 202575 servedAqua Pa EmlentonNatural background0.00 mg/LJun 2026915 servedAqua Pa FactoryvilleNatural background0.00 mg/LJun 20252,323 servedAqua Pa Fawn Lake ForestNatural background0.00 mg/LMay 20266,533 servedAqua Pa FieldcrestNatural background0.00 mg/LMar 2025112 servedAqua Pa Flying Hills Wa SysHuman impact likely2.20 mg/LJul 20255,100 servedAqua Pa Forest ParkNatural background0.00 mg/LMar 2025420 servedAqua Pa FranklinNatural background0.00 mg/LMay 2025265 servedAqua Pa FriendshipHealth-study range5.00 mg/LMay 20268,800 servedAqua Pa GarbushHealth-study range6.10 mg/LApr 2026203 servedAqua Pa Geigertown Water SysNatural background0.00 mg/LMay 2025200 servedAqua Pa Golden OaksNatural background0.00 mg/LMar 2025132 servedAqua Pa GreenbriarNatural background0.00 mg/LMar 2025222 servedAqua Pa GreenvilleNatural background0.00 mg/LAug 20258,600 servedAqua Pa Hamilton Water CoNatural background0.00 mg/LJun 20251,500 servedAqua Pa HatboroHuman impact likely2.50 mg/LJun 202612,901 servedAqua Pa Hex AcresNatural background0.00 mg/LMay 2025386 servedAqua Pa Hillcrest Estates IiHuman impact likely1.50 mg/LJun 2025214 servedAqua Pa HoneybrookHuman impact likely2.50 mg/LJun 20261,600 servedAqua Pa Inc Meribah Water CoNatural background0.00 mg/LMar 2026135 servedAqua Pa Inc Treasure Lake DivNatural background0.00 mg/LSep 20254,155 servedAqua Pa Jefferson HeightsNatural background0.00 mg/LApr 2026556 servedAqua Pa Jenks Twp WtpNatural background0.00 mg/LJun 20264,320 servedAqua Pa KratzervilleHealth-study range5.30 mg/LApr 2026435 servedAqua Pa Lake Latonka WtpNatural background0.00 mg/LDec 20251,600 servedAqua Pa Laurel LakesHuman impact likely1.10 mg/LJun 2025552 servedAqua Pa Links At Gettysburg SyHuman impact clear4.10 mg/LMar 2026398 servedAqua Pa Main SystemHuman impact clear4.00 mg/LJun 2026822,600 servedAqua Pa Maple HillsHuman impact clear3.90 mg/LJun 2025164 servedAqua Pa MidwayHuman impact likely1.40 mg/LMar 20252,450 servedAqua Pa Mifflin TownshipHuman impact likely2.40 mg/LMar 20261,220 servedAqua Pa Monroe TwpHuman impact likely2.20 mg/LApr 20262,400 servedAqua Pa Mountainhome SystemNatural background0.00 mg/LJun 20261,450 servedAqua Pa Mt JewettNatural background0.00 mg/LJun 2026972 servedAqua Pa OakhillHuman impact likely2.00 mg/LMar 2025434 servedAqua Pa OneidaNatural background0.00 mg/LJun 2025568 servedAqua Pa Paupackan Lake EstatesNatural background0.00 mg/LMay 2026800 servedAqua Pa Peddlers ViewHuman impact likely2.50 mg/LMar 2026600 servedAqua Pa Penn LakeHuman impact likely1.60 mg/LMar 2025150 servedAqua Pa Pennsview SystemHuman impact clear3.20 mg/LMar 2026350 servedAqua Pa Perkiomen TownshipHuman impact clear3.10 mg/LMar 20253,600 servedAqua Pa Perkiomen WoodsHuman impact clear4.00 mg/LJun 20251,100 servedAqua Pa PinecrestNatural background0.00 mg/LJun 2026500 servedAqua Pa Rhodes TerraceNatural background0.00 mg/LMar 202582 servedAqua Pa RivercrestHuman impact likely2.00 mg/LMay 2025625 servedAqua Pa Roaring Creek DivisionNatural background0.00 mg/LMay 202643,000 servedAqua Pa Robin Hood LakesNatural background0.00 mg/LJun 2025492 servedAqua Pa Sand SpringsNatural background0.00 mg/LJun 20251,383 servedAqua Pa Shenango Valley WtpNatural background0.00 mg/LApr 202648,000 servedAqua Pa Shickshinny LakeNatural background0.00 mg/LMar 2025250 servedAqua Pa Spring RunHuman impact clear4.00 mg/LMay 20258,151 servedAqua Pa Springhouse FarmsHuman impact clear4.20 mg/LApr 2026645 servedAqua Pa St Johns EstatesHuman impact likely2.50 mg/LAug 2025106 servedAqua Pa StonecroftHealth-study range7.30 mg/LMay 2026600 servedAqua Pa Sun ValleyNatural background0.00 mg/LJun 2025120 servedAqua Pa Superior Center PointHuman impact likely1.60 mg/LJun 2025500 servedAqua Pa Superior Ivy RidgeNatural background0.00 mg/LMay 2025150 servedAqua Pa Superior Main SystemHuman impact likely2.40 mg/LJul 202511,400 servedAqua Pa Superior MeadowbrookHuman impact likely2.00 mg/LJun 2025250 servedAqua Pa Susquehanna DivisionNatural background0.00 mg/LApr 202615,569 servedAqua Pa Tafton Wilson HillNatural background0.00 mg/LApr 202680 servedAqua Pa Tanglewood LakesNatural background0.00 mg/LJun 20261,321 servedAqua Pa Tanglwood NorthHuman impact likely1.10 mg/LApr 2026690 servedAqua Pa The PinesNatural background0.00 mg/LJun 2025160 servedAqua Pa Upper Providencepurchased waterHuman impact likely2.85 mg/LMay 2026810 servedAqua Pa UwchlanHuman impact clear3.10 mg/LJun 202635,518 servedAqua Pa WapwallopenNatural background0.00 mg/LJun 2025165 servedAqua Pa Warden PlaceNatural background0.00 mg/LMar 2025175 servedAqua Pa Washington ParkHuman impact likely2.00 mg/LMay 2025300 servedAqua Pa Water Co BrooklynNatural background0.00 mg/LApr 202544 servedAqua Pa Water Co ChinchillaNatural background0.00 mg/LJun 2025904 servedAqua Pa Water Co EdgewoodNatural background0.00 mg/LApr 2025382 servedAqua Pa Water Co ElmbrookNatural background0.00 mg/LJun 2026300 servedAqua Pa Water Co Garden HillsNatural background0.00 mg/LApr 202690 servedAqua Pa Water Co GlenburnNatural background0.00 mg/LJun 2025150 servedAqua Pa Water Co GouldsboroHuman impact likely1.30 mg/LJun 2026350 servedAqua Pa Water Co HawleyNatural background0.00 mg/LApr 20261,800 servedAqua Pa Water Co HonesdaleNatural background0.00 mg/LMay 20265,500 servedAqua Pa Water Co Hop BottomNatural background0.00 mg/LApr 2025174 servedAqua Pa Water Co MoscowNatural background0.00 mg/LApr 2026600 servedAqua Pa Water Co Mount CobbNatural background0.00 mg/LApr 2026120 servedAqua Pa Water Co Sci WaymartNatural background0.00 mg/LJun 20263,200 servedAqua Pa Water Co Sunset HillsNatural background0.00 mg/LApr 2025145 servedAqua Pa Water Co Thornhurst CcNatural background0.00 mg/LJun 2025500 servedAqua Pa Water Co WaymartHuman impact likely1.20 mg/LJun 20261,100 servedAqua Pa Wayne County PrisonNatural background0.00 mg/LMay 2026160 servedAqua Pa West ChesterHuman impact clear3.10 mg/LMar 202648,600 servedAqua Pa Wh Christian SpringsNatural background0.00 mg/LJun 2025153 servedAqua Pa White HavenHuman impact likely1.30 mg/LMar 20251,200 servedAqua Pa White Rock Acres SysNatural background0.00 mg/LJun 2026790 servedAqua Pa Whitehaven EvanwoodNatural background0.00 mg/LJun 202560 servedAqua Pa Wild Pines Water SysNatural background0.00 mg/LJun 2026440 servedAqua Pa Woodledge VillageNatural background0.00 mg/LJun 202658 servedAqua Pa Yalick FarmsNatural background0.00 mg/LMar 2025442 servedAqua ShenandoahNatural background0.00 mg/LMar 20269,500 servedArbor Manor AptsHuman impact likely1.70 mg/LNov 202576 servedArbour CourtHuman impact clear4.74 mg/LJun 2026180 servedArendtsville Muni Water SysHuman impact clear3.28 mg/LMay 20261,200 servedArnold ApartmentsNatural background0.37 mg/LMay 202644 servedArtesian Water Pa Incpurchased waterHuman impact likely1.77 mg/LJun 202695 servedAshland Area Water AuthorityNatural background0.20 mg/LDec 20254,200 servedAspen Ridge PoaNatural background0.00 mg/LSep 2025100 servedAspinwall Boro Water Deptpurchased waterNatural background0.38 mg/LMay 20263,151 servedBorough of AtglenHuman impact clear4.60 mg/LMay 20261,406 servedAuburn Municipal AuthorityNatural background0.00 mg/LAug 2025920 servedAudubon ParkNatural background0.64 mg/LDec 2025145 servedAustin Borough WaterNatural background0.72 mg/LMar 2025700 servedAuth of Boro of CharleroiNatural background0.00 mg/LAug 202527,000 servedAutumn Grove Care CenterNatural background0.00 mg/LAug 2025240 servedAutumn Hills Water CompanyNatural background0.00 mg/LSep 2025338 servedAvante ApartmentsHuman impact clear3.39 mg/LJul 2025315 servedAvanti Cove AptsNatural background0.00 mg/LJul 202516 servedBorough of AvondaleHuman impact clear3.07 mg/LApr 20261,108 servedAvonwheel Estate MhpHuman impact clear4.93 mg/LApr 2026300 servedAwc Valley Forge Crossing MhpHuman impact clear4.16 mg/LMay 2026250 served
B
Baden Boro Water Deptpurchased waterNatural background0.27 mg/LAug 20253,948 servedBainbridge Water AuthorityHealth-study range8.69 mg/LApr 20261,200 servedBald Eagle Boys CampNatural background0.79 mg/LJun 202643 servedBally Muni Water WorksHuman impact clear3.10 mg/LAug 20252,146 servedBarkeyville Mun AuthorityNatural background0.00 mg/LFeb 20261,600 servedBarton CourtHuman impact likely1.78 mg/LApr 2025118 servedBath Municipal Water WorksHuman impact clear4.24 mg/LApr 20262,680 servedBcwsa Fox Run PreserveHuman impact likely1.05 mg/LApr 2026220 servedBcwsa Main Lower Southpurchased waterHuman impact clear3.55 mg/LJun 202652,621 servedBcwsa New HopeHuman impact likely2.30 mg/LApr 20263,017 servedBcwsa SoleburyHuman impact likely2.66 mg/LApr 20262,100 servedBcwsa St Stephens GreeneHuman impact clear3.77 mg/LApr 2026130 servedBeacon Lite Mobile EstatesNatural background0.00 mg/LAug 2025100 servedBear Valley Joint AuthHuman impact likely1.23 mg/LNov 202512,589 servedBeartown Enterprise LlcHuman impact likely1.58 mg/LJun 202650 servedBeaver Boro Muni AuthHealth-study range5.58 mg/LApr 20265,799 servedBeaver Brook Assocpurchased waterHuman impact likely1.06 mg/LApr 2026150 servedBeaver Falls Muni AuthHuman impact likely1.12 mg/LNov 202549,500 servedBeaver Meadows Boroughpurchased waterNatural background0.00 mg/LMay 2026968 servedBeaver Run Water AssociationNatural background0.18 mg/LDec 202550 servedBeaver Valley MhpNatural background0.00 mg/LJan 202650 servedBeavertown Municipal AuthorityNatural background0.00 mg/LApr 2026935 servedBeccaria Coalport Irvona M ANatural background0.00 mg/LAug 20251,875 servedBedford Twp Muni AuthNatural background0.00 mg/LDec 20251,626 servedBedminster Mun AuthNatural background0.00 mg/LMay 20263,042 servedBeech Creek Borough AuthorityHuman impact likely1.75 mg/LMay 20261,800 servedBeechcrest Properties LlcNatural background0.00 mg/LAug 202525 servedBel Air Park AptsNatural background0.00 mg/LOct 202544 servedBelfast Twp Muni AuthNatural background0.00 mg/LSep 2025276 servedBelle Aire AcresNatural background0.00 mg/LApr 202655 servedBelle Vernon Boro Muni Authpurchased waterHuman impact likely1.01 mg/LJan 20256,000 servedBellefonte Borough Water AuthHuman impact likely2.02 mg/LApr 20269,500 servedBellwood Boro Authpurchased waterNatural background0.15 mg/LApr 20263,162 servedBendersville Muni AuthHuman impact likely1.22 mg/LOct 20251,039 servedBenners MhpHealth-study range5.00 mg/LJun 202660 servedBentleyville Muni Authpurchased waterNatural background0.00 mg/LAug 20252,600 servedBenton Hills MhpNatural background0.62 mg/LFeb 2026150 servedBenton Municipal Water AuthHuman impact likely2.12 mg/LJun 20261,333 servedBerkleigh Heights Mhp IncHealth-study range7.18 mg/LApr 202695 servedBerks Hill EstatesNatural background0.66 mg/LJun 202650 servedBerks Leisure LivingHuman impact likely1.21 mg/LJan 202649 servedBerlin Boro Muni AuthHuman impact likely1.24 mg/LJul 20252,468 servedBern Twp Muni Authpurchased waterNatural background0.00 mg/LJul 20261,800 servedBernies Mobile Home ParkNatural background0.00 mg/LSep 2025170 servedBernville BoroughHuman impact likely2.20 mg/LJun 20261,010 servedBessemer Borough Water DeptNatural background0.00 mg/LJul 20251,100 servedBeth 512 Systempurchased waterHuman impact clear4.24 mg/LApr 2026725 servedBeth Country Squire EstatesNatural background0.00 mg/LSep 202587 servedBeth Shady Lane SystemNatural background0.00 mg/LSep 202561 servedBeth Wil Mar ManorNatural background0.00 mg/LSep 202590 servedBethany Childrens HomeNatural background0.00 mg/LFeb 2026200 servedBethany VillageHuman impact likely1.31 mg/LJan 202699 servedCity of BethlehemNatural background0.00 mg/LAug 2025117,259 servedBig Bass Lake Water Assoc.Human impact likely1.55 mg/LDec 2024130 servedBig Boulder MhpHuman impact clear4.60 mg/LApr 202640 servedBig Spring Terrace MhpHealth-study range7.57 mg/LMay 2026439 servedBiglerville Water CoHuman impact likely2.42 mg/LJun 20262,501 servedBirchwood Trailer ParkHuman impact likely2.57 mg/LDec 2025389 servedBirdsboro Muni Water AuthNatural background0.00 mg/LApr 20255,353 servedBlack Hawk Mobile Home ParkHealth-study range6.17 mg/LJun 2026100 servedBlacklick Valley Muni Authpurchased waterNatural background0.00 mg/LMay 20261,650 servedBlain Water CoHealth-study range5.90 mg/LApr 2026321 servedBlair MhpNatural background0.00 mg/LJan 2026185 servedBlair Twp Water & Sewer Authpurchased waterNatural background0.15 mg/LApr 20262,550 servedBlairsville Muni AuthNatural background0.00 mg/LJul 20254,023 servedBlarneystone SubdivisionNatural background0.00 mg/LMay 202675 servedBlawnox Boro Water Deptpurchased waterNatural background0.38 mg/LMay 20262,200 servedBloomfield Boro Water AuthHealth-study range5.25 mg/LMay 20261,170 servedBloss Township WaterworksNatural background0.00 mg/LJan 2026325 servedBlossburg Municipal AuthorityNatural background0.00 mg/LJan 20261,650 servedBlue Heron Homeowners AssocNatural background0.56 mg/LMay 2026450 servedBlue Heron VillageHuman impact likely1.52 mg/LMay 202680 servedBlue Knob Water CoNatural background0.00 mg/LMay 2026300 servedBlue Mountain Heights MhpNatural background0.00 mg/LMay 2026162 servedBlue Mountain ViewHuman impact likely2.72 mg/LJun 2026114 servedBlue Mtn Village On Chicola LkNatural background0.00 mg/LMay 2026160 servedBlue Springs TerraceNatural background0.00 mg/LMay 2026250 servedBlythe Twp Municipal AuthorityNatural background0.00 mg/LNov 20257,100 servedBonneauville Muni Water AuthHuman impact clear4.27 mg/LApr 20262,730 servedBooneville Mutual Water AssocNatural background0.00 mg/LAug 202587 servedBoro of WaynesboroNatural background0.41 mg/LApr 202613,200 servedBoswell Boro Muni AuthNatural background0.00 mg/LAug 20252,900 servedBowmanstown AuthorityHuman impact likely1.32 mg/LApr 2026900 servedBoyertown Muni AuthNatural background0.00 mg/LFeb 20268,000 servedBrackenridge Boro Water DeptNatural background0.66 mg/LJan 20263,700 servedBraddock Boro Water Authpurchased waterNatural background0.33 mg/LAug 20251,708 servedBradford City Water AuthorityNatural background0.23 mg/LApr 202518,500 servedBradford County Sewer & WaterNatural background0.00 mg/LSep 2025700 servedBrady Hills MlNatural background0.00 mg/LJul 2025400 servedBrady Twp Water AssociationNatural background0.00 mg/LSep 20251,570 servedBrandon MaintenanceNatural background0.22 mg/LJul 2025300 servedBrighton Twp Muni Authpurchased waterHuman impact likely1.82 mg/LAug 20257,920 servedBrinton ManorHuman impact clear4.99 mg/LJun 2026196 servedBroadtop City Water AuthNatural background0.00 mg/LAug 2025350 servedBrockway Boro Municipal AuthNatural background0.13 mg/LJul 20254,384 servedBrodhead Creek Reg Water AuthNatural background0.27 mg/LMay 202630,000 servedBrookline ManorHealth-study range5.11 mg/LApr 2026100 servedBrookline Retirement VillageHealth-study range5.39 mg/LApr 2026150 servedBrookmont Health Care CenterNatural background0.00 mg/LMay 2026229 servedBrookside Mobilehome ParkHealth-study range5.55 mg/LMay 2026176 servedBrookside Village MhpHealth-study range8.75 mg/LApr 2026475 servedBrookville Municipal AuthNatural background0.00 mg/LSep 20256,220 servedBrookwood CountrysideHuman impact clear4.22 mg/LApr 2026200 servedBrush Creek Country EstatesNatural background0.00 mg/LApr 202698 servedBuck Hill Falls Water CoNatural background0.52 mg/LJun 2026876 servedBuckingham HeightsNatural background0.00 mg/LOct 202557 servedBuckingham PreserveHuman impact clear3.95 mg/LJul 202650 servedVillage of Buckingham SpringsHuman impact likely1.65 mg/LMay 20261,295 servedBuckingham Twp Cold SpringHuman impact likely2.98 mg/LOct 20254,760 servedBuckingham Twp FieldstoneHuman impact likely2.21 mg/LOct 2025281 servedBuckingham Twp FurlongHuman impact likely2.30 mg/LOct 20254,150 servedBuckingham Twp Mill Cr RidgeNatural background0.70 mg/LOct 202599 servedBuckingham Vly Rehab & NursingNatural background0.00 mg/LJul 2025190 servedBucknell View MhpHuman impact clear3.72 mg/LMar 2026100 servedBucks Run ApartmentsNatural background0.00 mg/LMay 2026130 servedBuffalo Twp Mun Auth FreeportNatural background0.35 mg/LAug 20255,849 servedBuhl Community Water CompanyNatural background0.00 mg/LFeb 20262,227 servedBurnside Boro Water SystemNatural background0.12 mg/LAug 2025325 served
C
Caernarvon Twp AuthHuman impact clear3.89 mg/LFeb 20264,245 servedCairnbrook Improvement AssnNatural background0.00 mg/LAug 2025910 servedCalamus EstatesHealth-study range7.33 mg/LJun 2026140 servedCaln Mobile Home ParkHuman impact clear3.76 mg/LOct 202530 servedCambria Twp Water AuthHuman impact likely2.54 mg/LMay 20261,000 servedCambridge Area Joint Authpurchased waterNatural background0.00 mg/LAug 2025225 servedCambridge Springs BoroughNatural background0.00 mg/LAug 20252,363 servedCamp Hebron CwsNatural background0.00 mg/LOct 202575 servedCamphill SoltaneHuman impact clear3.41 mg/LJan 2026152 servedCamphill Spec Sch Beaver FarmHuman impact clear4.09 mg/LJan 202545 servedCamphill Spec Sch Beaver RunHealth-study range6.03 mg/LJun 2026140 servedCamphill Village Kimberton HlsHealth-study range8.52 mg/LApr 2026100 servedCan Do Corporate CenterNatural background0.00 mg/LMar 20261,291 servedCanal Mobile Home ParkNatural background0.00 mg/LAug 2025200 servedCanton Borough AuthorityHuman impact likely2.00 mg/LApr 20262,050 servedCapital Region WaterNatural background0.76 mg/LApr 202666,540 servedCarbon County Correctional FacNatural background0.15 mg/LMay 2026125 servedCarlisle Water Trmt PltHuman impact clear3.96 mg/LJun 202626,000 servedCarpenters Park IncNatural background0.00 mg/LMar 2026120 servedCarroll Valley Water SystemHuman impact likely2.07 mg/LMay 2026267 servedCarrolltown Boro Muni AuthNatural background0.31 mg/LJul 2025850 servedCarson Towerspurchased waterNatural background0.38 mg/LMay 2026266 servedCastle Hill MhpHuman impact likely1.15 mg/LJan 2026120 servedCatasauqua Mun Water WorksHealth-study range6.59 mg/LApr 20266,598 servedCatawissa Municipal Water AuthHuman impact clear3.72 mg/LSep 20251,644 servedCavalry Heights MhpHuman impact clear3.06 mg/LJun 202680 servedCedar Acres Mobile Home ParkNatural background0.00 mg/LSep 202595 servedCedar Grove Mobile Home ParkHealth-study range9.89 mg/LApr 202665 servedCedar Manor MhpHuman impact likely2.82 mg/LMay 2026432 servedCent Clinton Co Water Fil AuthNatural background0.00 mg/LApr 202625 servedCenter Twp Water AuthNatural background0.97 mg/LSep 202519,000 servedCenterville Muni Water AuthHuman impact likely1.16 mg/LJul 202575 servedCentral City Water AuthNatural background0.00 mg/LSep 20251,984 servedCentral Indiana Co Water AuthNatural background0.19 mg/LAug 20254,920 servedCentre County Mhc LlcNatural background0.00 mg/LMay 2026100 servedCentre Hall Boro Water DeptHealth-study range9.90 mg/LApr 20261,900 servedChambersburg Boro Water SysNatural background0.00 mg/LFeb 202631,048 servedCharles Cole Memorial HospitalNatural background0.00 mg/LMar 2026750 servedChase Manor Water AssocNatural background0.00 mg/LMar 202595 servedCherry Hill At Holiday ParkHuman impact clear3.29 mg/LOct 202541 servedCherry Hill Mobile Home CourtHuman impact likely2.38 mg/LOct 202586 servedCherry Mobile Home ParkNatural background0.00 mg/LNov 202562 servedChester Water AuthorityHuman impact likely1.77 mg/LJun 2026140,437 servedChestnut Ridge MhpHuman impact clear3.88 mg/LMay 2026152 servedCheswick Boro Water Deptpurchased waterNatural background0.67 mg/LOct 20251,861 servedChicora Boro Water SupplyNatural background0.04 mg/LJun 20261,100 servedChicora Medical CenterNatural background0.00 mg/LJan 2026150 servedChoconut Creek ApartmentsNatural background0.00 mg/LJan 202550 servedChristiana Muni Water AuthHealth-study range9.36 mg/LMay 20261,100 servedChrists Home For ChildrenHuman impact clear3.06 mg/LJan 202631 servedClarendon Acres Water CoHuman impact likely1.55 mg/LFeb 2025280 servedClarks Summit State HospitalHuman impact likely1.32 mg/LMay 2026747 servedClearfield Municipal AuthNatural background0.00 mg/LJan 202614,000 servedClermont Water AssociationNatural background0.00 mg/LMay 202638 servedCliff View MhpHealth-study range6.19 mg/LJun 2026330 servedClintonville Boro WtpNatural background0.00 mg/LAug 2025557 servedClymer Boro Muni AuthNatural background0.00 mg/LNov 20251,700 servedCoaldale Six Mile Run WaterNatural background0.00 mg/LJul 2025320 servedCoatesville Veterans Adm HospHuman impact likely1.77 mg/LApr 20252,000 servedCobbs Lake PreserveNatural background0.00 mg/LAug 2025200 servedCocalico Manor MhpHuman impact likely1.19 mg/LApr 202692 servedCochranton Boro Water DeptHuman impact likely1.27 mg/LApr 20261,136 servedCochranville MhpHuman impact likely2.37 mg/LJul 202699 servedCole Mobile Home ParkNatural background0.00 mg/LAug 202570 servedCollege Twp Water AuthorityHuman impact clear4.07 mg/LMay 20266,000 servedCollegeville Trappe Joint PwdHuman impact clear3.26 mg/LMay 20268,470 servedCollinsville MhpHealth-study range5.56 mg/LJun 202628 servedCollomsville Mutual WaterworksNatural background0.00 mg/LSep 2025250 servedColonial Glenn EstatesNatural background0.00 mg/LSep 202550 servedColony Cove East & South HoaNatural background0.00 mg/LApr 2026101 servedColumbia Water CoHealth-study range6.13 mg/LApr 202625,200 servedCommunity Is OmmunityNatural background0.35 mg/LMay 202584 servedCommunity Utilites Westgatepurchased waterNatural background0.00 mg/LAug 20252,668 servedConcordia Lutheran HomeNatural background0.00 mg/LSep 2025950 servedConemaugh Twp Muni AuthNatural background0.61 mg/LMar 20257,800 servedConestoga Hills CommunityHuman impact clear3.59 mg/LApr 2026150 servedConestoga Mobile Home ParkHuman impact likely1.73 mg/LApr 202665 servedConewago Valley MhpHuman impact likely1.89 mg/LJan 2026225 servedConfluence Boro Muni AuthNatural background0.00 mg/LJul 2025645 servedConneaut Lake Borough WtpNatural background0.00 mg/LJul 2025870 servedConneaut Lake Park WaterNatural background0.00 mg/LSep 2025250 servedConneautville Boro Water DeptNatural background0.00 mg/LJul 2025850 servedConodoguinet Mobile EstNatural background0.00 mg/LMar 2026265 servedBorough of Conwaypurchased waterHuman impact likely1.12 mg/LNov 20252,176 servedConyngham Sugarloaf Joint MaHuman impact clear3.79 mg/LMar 20263,230 servedCooks MhpHuman impact likely1.13 mg/LFeb 202692 servedCooper Twp Municipal AuthNatural background0.00 mg/LApr 20263,700 servedCoopersburg Mun Water AuthNatural background0.00 mg/LApr 20262,570 servedCooperstown Water CompanyHuman impact likely1.10 mg/LMay 2026360 servedCopper Kettle MhpNatural background0.46 mg/LMar 202562 servedCoral Ridge Estates MhpNatural background0.00 mg/LJul 2025200 servedCoraopolis Water & Sewer AuthHuman impact likely1.20 mg/LApr 20265,804 servedCorner Water Supply & ServiceNatural background0.00 mg/LMar 20252,100 servedCornerstone LivingHealth-study range5.63 mg/LJun 202644 servedCornplanter Townshippurchased waterNatural background0.36 mg/LFeb 20261,835 servedBorough of Cornwallpurchased waterNatural background0.31 mg/LMay 20263,343 servedCorry Two MhcNatural background0.12 mg/LAug 202588 servedCoudersport Boro AuthorityHuman impact likely1.04 mg/LAug 20253,166 servedCountry Acres MhpHealth-study range7.14 mg/LJun 2026400 servedCountry Acres Mobile Home ParkNatural background0.00 mg/LJul 202560 servedCountry Acres Personal CareNatural background0.00 mg/LSep 202535 servedCountry Acres Trailer CourtNatural background0.00 mg/LJul 202559 servedCountry Club ParkHealth-study range6.94 mg/LMay 202675 servedCountry Corner Rv ParkHuman impact clear3.62 mg/LMay 202650 servedCountry Crest MhpHuman impact likely2.19 mg/LMay 2026150 servedCountry EstatesNatural background0.16 mg/LSep 202570 servedCountry Estates MhpNatural background0.00 mg/LJul 202590 servedCountry Gardens Trailer CourtHuman impact likely1.41 mg/LAug 2025180 servedCountry Hills AptsHuman impact likely2.93 mg/LMay 202640 servedCountry Pines MhpHuman impact likely1.51 mg/LOct 2025280 servedCountry Place MhpNatural background0.00 mg/LMay 2026225 servedCountry Roads MhpNatural background0.00 mg/LJul 202560 servedCountry Terrace EstatesNatural background0.00 mg/LNov 202570 servedCountry View EstNatural background0.00 mg/LMar 2026330 servedCountry View Manor YwcHealth-study range6.82 mg/LMay 2026125 servedCountry View MhpHuman impact likely2.81 mg/LApr 202698 servedCountry View Village LpNatural background0.00 mg/LAug 202550 servedCountry Village MhpHuman impact likely1.01 mg/LMar 2025175 servedCountryside Christian CommNatural background0.00 mg/LFeb 2026100 servedCountryside Estates MhpNatural background0.00 mg/LJul 202539 servedCountryside MhpNatural background0.00 mg/LJul 202569 servedCountryside MhpNatural background0.49 mg/LMar 202660 servedCoventry TerraceHealth-study range6.06 mg/LApr 2026250 servedCovington Karthaus Girard A ANatural background0.00 mg/LJul 20251,700 servedCowanshan Yatesboro Numine SysNatural background0.26 mg/LJul 20251,200 servedCowanshannock M A Sagamore SysNatural background0.00 mg/LJul 2025300 servedCowanshannock Ma-Margaret SysNatural background0.18 mg/LJul 202595 servedCoylesville CourtNatural background0.00 mg/LJul 202576 servedCozy Oaks MhpNatural background0.00 mg/LDec 202565 servedCraley MhpHuman impact clear3.20 mg/LJun 202635 servedCranberry Twp Wtppurchased waterNatural background0.80 mg/LJan 202642,000 servedCranberry Village MhpNatural background0.00 mg/LFeb 2025400 servedCranesville Water Departmentpurchased waterNatural background0.00 mg/LAug 2025638 servedCrawford Township AuthorityNatural background0.00 mg/LMay 2026600 servedCreek View Mobile Home CommunNatural background0.11 mg/LMar 202680 servedCreekside Manor M H PHuman impact likely1.34 mg/LJan 202663 servedCreekside SubdivisionHuman impact clear3.26 mg/LJan 2026250 servedCreekview Farms MhpHuman impact likely1.54 mg/LAug 2025450 servedCreekview MhpHuman impact clear4.12 mg/LMay 2026200 servedCrescent LakeNatural background0.56 mg/LAug 202590 servedCrescent Lake North Comm AssocHuman impact likely1.82 mg/LDec 202593 servedCresson Boro Water Syspurchased waterNatural background0.33 mg/LAug 20251,700 servedCresson Twp Muni Authpurchased waterNatural background0.33 mg/LAug 20252,500 servedCrestview MhpHuman impact likely1.96 mg/LApr 202691 servedCrestview Mobile Home ParkNatural background0.00 mg/LSep 202535 servedCrestview Village MhpHuman impact clear4.20 mg/LDec 2025223 servedCrestwood CommunityHuman impact clear3.48 mg/LJul 2026470 servedCreswell Heights Jt AuthNatural background0.00 mg/LAug 202515,000 servedCrosby Water AssociationNatural background0.22 mg/LNov 202556 servedCross Station Mobile Home CommHuman impact likely1.89 mg/LAug 2025100 servedCrossroads MhpHealth-study range6.28 mg/LApr 202630 servedCroyle Twp Water Authpurchased waterNatural background0.30 mg/LJul 2025989 servedCrystal Springs MhpNatural background0.00 mg/LAug 202525 servedCupec Mobile EstatesNatural background0.00 mg/LJul 202556 servedCurryville Water Authpurchased waterHuman impact clear4.49 mg/LApr 202685 servedCypress ParkNatural background0.00 mg/LJan 2026210 served
D
D And H Trailer ParkHuman impact likely1.77 mg/LMay 202650 servedD And S EstatesNatural background0.00 mg/LJan 202661 servedD Water CompanyHuman impact likely1.70 mg/LJan 2026150 servedDallas MhpHuman impact likely1.42 mg/LOct 202586 servedDallastown Yoe Water Authpurchased waterHuman impact clear4.26 mg/LMay 202612,300 servedDanville Municipal Water AuthNatural background0.89 mg/LJan 20264,992 servedDarway Healthcare & RehabHuman impact likely1.38 mg/LJun 2026100 servedDavis EstatesHuman impact likely2.67 mg/LAug 202550 servedDayton Muni Water DeptNatural background0.00 mg/LAug 2025600 servedDean Twp Water SystemNatural background0.10 mg/LSep 2025216 servedDeann Village MhpHuman impact likely2.00 mg/LAug 2025135 servedDeer Chase MhpHuman impact likely2.20 mg/LAug 202584 servedDeer Lake Citizens AssocHuman impact likely1.16 mg/LMay 2026380 servedDeer Run Mobile Home ParkHuman impact likely2.41 mg/LMay 202654 servedDeerfield Village MhpHuman impact clear4.01 mg/LJun 202681 servedDeerhaven White Beauty View EsNatural background0.00 mg/LJun 202653 servedDefiance Water AssnHuman impact likely1.26 mg/LDec 2025205 servedDel-Aire Mobile Home ParkHuman impact likely1.31 mg/LApr 202633 servedDelaware Water Gap BoroNatural background0.00 mg/LApr 2025850 servedDelmar Meadows MhcNatural background0.00 mg/LApr 202664 servedDelta Boro Water SysHuman impact likely2.52 mg/LJun 20261,400 servedDemorgan Acres MhpNatural background0.70 mg/LJul 202590 servedDenny Ridge Mobile Home ParkNatural background0.47 mg/LAug 202560 servedDenver BoroHuman impact clear3.94 mg/LApr 20263,861 servedDerry Boro Muni AuthNatural background0.00 mg/LAug 20256,500 servedDesales UniversityHuman impact likely2.83 mg/LApr 20262,000 servedDevereux Pocono CenterNatural background0.61 mg/LMay 2025115 servedDevon Creek DevelopmentHuman impact clear3.22 mg/LApr 2026100 servedDickinson Twp Munic Authpurchased waterHuman impact clear3.36 mg/LApr 2026250 servedDillsburg Area AuthorityHuman impact clear3.49 mg/LSep 20258,962 servedDock Woods Communitypurchased waterHuman impact likely2.96 mg/LApr 202672 servedDoe Run Mobile Home ParkHuman impact clear4.43 mg/LJun 202629 servedDonegal Townshippurchased waterNatural background0.85 mg/LMar 2026820 servedDover Boro Water SysHuman impact clear4.43 mg/LJun 20261,900 servedDover Twp Water SysHuman impact likely2.93 mg/LMay 202621,097 servedDowningtown Water AuthorityHuman impact likely2.35 mg/LJan 20269,900 servedDoylestown Boro Water DeptHuman impact clear3.84 mg/LApr 20268,700 servedDriftwood BoroughNatural background0.19 mg/LFeb 2025258 servedDriftwood CourtHealth-study range5.71 mg/LApr 202653 servedDrumore MhpNatural background0.00 mg/LJan 202640 servedDry Run Water AssnNatural background0.00 mg/LMar 2026278 servedDtma Cedar Crest Farmspurchased waterHuman impact clear3.55 mg/LJun 2026300 servedDtma Main SystemHuman impact clear4.34 mg/LMay 20268,655 servedBorough of DublinHuman impact likely1.20 mg/LJan 20262,200 servedDublin Acres Homeowners AssocNatural background0.00 mg/LFeb 2025175 servedCity of Dubois Water DepartNatural background0.00 mg/LAug 20257,794 servedDudley Carbon Coalmont Jm AuthNatural background0.00 mg/LJul 2025403 servedDuncan Twp Municipal AuthorityNatural background0.00 mg/LMay 2026220 servedDuncannon Muni WaterHealth-study range5.32 mg/LApr 20262,000 servedDuncansville Mhp LlcNatural background0.00 mg/LOct 2025250 servedDuncansville Muni Water AuthHuman impact likely1.89 mg/LAug 20252,350 servedDuquesne Water Deptpurchased waterNatural background0.64 mg/LJul 20255,565 servedDurham Quarters AptsHuman impact likely1.54 mg/LOct 202525 servedDushore Water AuthorityHuman impact likely1.27 mg/LSep 2025400 servedDutch Mobilehome ParkHealth-study range7.91 mg/LJun 202645 servedDymonds MhpHuman impact clear3.87 mg/LDec 202576 served
E
E Armstrong Cnty Muni AuthNatural background0.00 mg/LDec 20251,875 servedE Bangor Mun AuthorityNatural background0.00 mg/LApr 2026800 servedE Greenville Boro Water DeptHuman impact likely1.88 mg/LNov 20253,100 servedE J Gulick MhpNatural background0.00 mg/LJul 202578 servedE Stroudsburg Boro Water DeptHuman impact likely1.04 mg/LMar 202613,000 servedE&Y Farm ApartmentsHuman impact clear4.50 mg/LApr 2026135 servedEagle CreekNatural background0.00 mg/LMay 202660 servedEagle Crest Manor MhpNatural background0.17 mg/LAug 202571 servedEagle Ridge Personal Care HomeNatural background0.00 mg/LMar 202537 servedEagle View MhpHuman impact likely1.66 mg/LJun 2026230 servedEast Berlin Area Joint AuthHuman impact clear4.47 mg/LMay 20261,750 servedEast Brady Water SystemHuman impact likely2.41 mg/LMay 20261,040 servedEast Cocalico TownshipHealth-study range5.73 mg/LApr 20266,735 servedEast Deer Twp Water Deptpurchased waterNatural background0.92 mg/LFeb 20252,000 servedEast DonegalHuman impact likely2.96 mg/LApr 20264,048 servedEast Hempfield Water AuthHealth-study range8.94 mg/LMay 202620,988 servedEast Petersburg BoroughHealth-study range5.12 mg/LMay 20266,215 servedEast Sharpsburg Water AssnNatural background0.00 mg/LAug 202595 servedEast Taylor Muni Authpurchased waterNatural background0.82 mg/LFeb 20253,152 servedEastbrook ApartmentsNatural background0.00 mg/LJul 202575 servedEastern Cumberland Water SysHuman impact likely1.63 mg/LFeb 2026150 servedEaston Area Water SystemNatural background0.00 mg/LApr 202696,867 servedEastville Water AssociationNatural background0.00 mg/LMay 202675 servedEaton Sewer & Water CoHuman impact likely1.29 mg/LSep 20253,100 servedEbensburg Boro Muni AuthNatural background0.00 mg/LMay 20268,500 servedEcho Beach MhpNatural background0.00 mg/LJun 202543 servedEcho Valley EstatesHuman impact likely2.05 mg/LAug 2025490 servedEcho Valley MhpHealth-study range7.47 mg/LJun 202660 servedEden Glen VillageHuman impact likely2.34 mg/LApr 202680 servedEdenville Water Assn IncNatural background0.00 mg/LJul 2025491 servedEdgewood At Countryside AptsHuman impact likely1.51 mg/LFeb 202680 servedEdgewood Mobile Home ParkNatural background0.62 mg/LMar 2026117 servedEdgeworth Boro Muni Authpurchased waterNatural background0.27 mg/LAug 20257,781 servedEdinboro Mh Village SouthNatural background0.33 mg/LSep 202560 servedEdinboro Water AuthorityNatural background0.29 mg/LDec 20257,800 servedEdwards Mobile Home ParkHuman impact likely1.56 mg/LApr 202690 servedEei Meadows ComplexHuman impact likely1.16 mg/LJan 2026628 servedEisenhower Water SupplyHuman impact likely1.78 mg/LApr 2026760 servedElderberry MhpNatural background0.00 mg/LJun 202560 servedEldred Borough Water AuthNatural background0.32 mg/LJul 2025850 servedEldred Twp Munic AuthNatural background0.00 mg/LAug 2025700 servedElizabethtown Area WaterHealth-study range7.33 mg/LJun 202619,000 servedElizabethville Area AuthNatural background0.00 mg/LApr 20262,700 servedElk MeadowsNatural background0.26 mg/LMar 202696 servedElkland Boro Water AuthorityNatural background0.00 mg/LJan 20262,660 servedEllsworth Boro Water Deptpurchased waterNatural background0.00 mg/LAug 20251,250 servedElverson Water CompanyHealth-study range5.89 mg/LApr 20261,641 servedEmery Cove EstatesNatural background0.99 mg/LFeb 202648 servedEmily Estates SubdivHealth-study range7.08 mg/LApr 2026162 servedEmmaus Borough Public WaterHuman impact clear4.67 mg/LApr 202614,000 servedEmpire Mobile Home ParkNatural background0.00 mg/LDec 202575 servedEmporium Water CompanyNatural background0.00 mg/LSep 20253,300 servedEphrata Area Joint AuthorityHealth-study range5.45 mg/LApr 202624,500 servedErie City Water AuthorityNatural background0.20 mg/LMay 2026220,001 servedEstates At Hamilton HillsNatural background0.00 mg/LApr 202684 servedEstates At Stone RowHuman impact likely1.23 mg/LMar 202548 servedEvans City Boroughpurchased waterHuman impact likely1.88 mg/LOct 20251,990 servedEverett Boro Muni AuthNatural background0.00 mg/LJul 20252,048 servedEvergreen Mhc LlcNatural background0.96 mg/LMar 202580 servedEvergreen Mobile Home ParkNatural background0.00 mg/LOct 202575 servedEvergreen Village MhpHuman impact likely1.99 mg/LDec 2025316 servedEvitts Creek Water CoNatural background0.00 mg/LApr 2026100 servedExeter Twp Sr Ctr & Apt CompleNatural background0.51 mg/LDec 202550 served
F
Fair WindsNatural background0.11 mg/LMar 2026182 servedFairfield Manor MhpNatural background0.00 mg/LJun 202592 servedFairfield Muni AuthHuman impact likely1.76 mg/LDec 20252,150 servedFairmount HomeHuman impact likely1.70 mg/LMay 2026483 servedFairview Twp Water Auth Dist 3Human impact likely1.92 mg/LAug 20253,320 servedFairview Twp Water District 1purchased waterNatural background0.20 mg/LMay 20264,500 servedFalls Creek Boro Mun Authpurchased waterNatural background0.00 mg/LAug 20251,440 servedFalls Twp Water & Sewer Deptpurchased waterHuman impact clear3.55 mg/LJun 202624,400 servedFamily And FriendsNatural background0.00 mg/LFeb 202640 servedFawn Frazer Jt Water Authpurchased waterNatural background0.66 mg/LJan 20264,650 servedFawn Valley South & NorthNatural background0.00 mg/LMay 2026100 servedFederal Corr Institute LorettoNatural background0.00 mg/LAug 20251,500 servedFentons CornerHuman impact likely1.01 mg/LOct 202525 servedFinch Hill Water CoNatural background0.07 mg/LJan 2026150 servedFindlay Twp Municipal Authpurchased waterNatural background0.54 mg/LMay 202611,460 servedFishertown Water AssnHuman impact likely2.55 mg/LJan 2026801 servedFleetwood Boro Water SystemHuman impact likely2.24 mg/LMar 20264,218 servedFord City Muni Water WorksHuman impact likely1.48 mg/LFeb 20252,991 servedForest Brook MhpNatural background0.43 mg/LSep 2025200 servedForest Green EstatesNatural background0.00 mg/LOct 2025225 servedForest Hills PchNatural background0.00 mg/LDec 202540 servedForrest Brooke MhpNatural background0.00 mg/LJul 2025491 servedFort Indiantown Gappurchased waterNatural background0.31 mg/LMay 20263,100 servedVillage of Four SeasonsNatural background0.56 mg/LOct 2025325 servedFour Seasons Estates MhpHuman impact likely1.44 mg/LJan 202698 servedFox Chapel Authpurchased waterNatural background0.38 mg/LMay 202618,500 servedFox Glen GardensNatural background0.00 mg/LFeb 202695 servedFoxburg Area Water & Sewer AutHuman impact likely1.60 mg/LJul 2025925 servedFoxcroft Manor Mobile Home PkNatural background0.00 mg/LMar 2026200 servedFranklin Mobile Home VillageNatural background0.33 mg/LSep 202580 servedFranklin System York WaterNatural background0.47 mg/LJan 20264,400 servedFranklin Twp Muni AuthHuman impact clear4.12 mg/LJan 2026441 servedFranklintown Boro Muni AuthHuman impact likely2.53 mg/LFeb 2025705 servedFrederick LivingNatural background0.65 mg/LDec 2025640 servedFredericksburg Water AssnNatural background0.00 mg/LAug 2025300 servedFredericksburg Water AuthHuman impact likely2.87 mg/LMay 20261,200 servedFredonia BoroNatural background0.00 mg/LFeb 2025443 servedFreeburg Municipal AuthorityHealth-study range6.57 mg/LJun 2026685 servedFreedom Twp Water & Sewerpurchased waterNatural background0.15 mg/LApr 20261,400 servedFreeland Boro Muni Water AuthHuman impact clear3.25 mg/LMar 20264,610 servedFreemans MhpHealth-study range8.02 mg/LApr 202683 servedFreemansburg MhcHuman impact clear3.97 mg/LApr 202690 servedFrelighs Whispering Pines MhpHuman impact clear3.36 mg/LAug 202542 servedFrieden Manor MhpNatural background0.97 mg/LMar 2026350 servedFritzingertown Sr Liv Comm #1Human impact clear3.02 mg/LOct 202566 servedFritzingertown Sr Liv Comm #2Human impact clear3.76 mg/LOct 2025118 servedFryburg Water CompanyNatural background0.00 mg/LMay 2026490 served
G
Galeton Borough AuthorityNatural background0.00 mg/LApr 20261,200 servedGallitzin Boro Water AuthNatural background0.00 mg/LMay 20263,130 servedGap View Community MhpHealth-study range7.53 mg/LMay 202650 servedGap View Mobile Home ParkNatural background0.00 mg/LMay 202672 servedGarrett Boro Water SysNatural background0.00 mg/LSep 2025449 servedGeisingers MhpHuman impact likely1.77 mg/LApr 202684 servedGeneral Authority of FranklinHuman impact likely1.20 mg/LJan 20269,096 servedGenesee Twp Water AuthorityNatural background0.00 mg/LApr 2026450 servedGettysburg Muni AuthHuman impact likely2.66 mg/LJun 202612,425 servedGetz Personal Care HomeHealth-study range5.79 mg/LApr 202695 servedGilbert Mobile Home ParkNatural background0.00 mg/LJan 2026150 servedGillett MhcNatural background0.00 mg/LApr 2025100 servedGilpin Twp Muni Authpurchased waterNatural background0.59 mg/LJul 20251,680 servedGirard Boro Water DeptHuman impact likely2.54 mg/LJul 20253,301 servedGlades Pike Estates Mhp LlcNatural background0.15 mg/LJul 2025180 servedGlasgow Municipal Water WorksNatural background0.42 mg/LNov 202551 servedGlen Campbell Water WorksNatural background0.00 mg/LAug 2025260 servedGlen Lake EstatesNatural background0.00 mg/LSep 202594 servedGlen Rock Water Authpurchased waterHuman impact clear3.63 mg/LMay 20262,000 servedGlencrest Mobile Home ParkHealth-study range7.58 mg/LMay 2026570 servedGlendale Valley Municipal Authpurchased waterNatural background0.10 mg/LJul 20253,200 servedGlenwood Mobilehome ParkHuman impact likely2.87 mg/LMay 202640 servedGluco LodgeHuman impact likely2.27 mg/LFeb 202665 servedGoldsboro Boro Water CoHuman impact likely2.35 mg/LJan 2026475 servedGracious Living Estates PchNatural background0.94 mg/LJan 202677 servedGrampas Woods EstatesNatural background0.00 mg/LSep 202545 servedGrampian Boro Penn Twp Mapurchased waterNatural background0.00 mg/LJul 20251,400 servedGrandview Acres MhpNatural background0.11 mg/LJul 202570 servedGrantville MhpHuman impact likely2.43 mg/LApr 20261,040 servedGratz Boro Water Revenue FundHuman impact clear4.90 mg/LJun 2026738 servedGray Area Watr Auth of Jen TwpNatural background0.00 mg/LDec 2025700 servedGreater Johnstown Wa RiversideNatural background0.00 mg/LFeb 202649,500 servedGreater Johnstown Wa SaltlickNatural background0.82 mg/LFeb 2025170 servedGreen Acres Mhcpurchased waterNatural background0.00 mg/LMay 20261,475 servedGreen Acres MhpHuman impact likely2.94 mg/LMay 202647 servedGreen Acres Mobile Home ParkHuman impact likely2.69 mg/LFeb 202648 servedGreen Acres ParkNatural background0.00 mg/LMay 2026280 servedGreen Grove Trailer CtHealth-study range6.48 mg/LMay 202675 servedGreen Hill MhpNatural background0.00 mg/LApr 2025323 servedGreen Mountain EstatesHuman impact likely1.47 mg/LDec 2025108 servedGreen Township Ma CookportNatural background0.00 mg/LJun 2025250 servedGreen Twp Mun Auth Barr SlopeNatural background0.00 mg/LJun 2025285 servedGreen Twp Mun Auth-CommodoreNatural background0.00 mg/LJun 2025350 servedGreenburr Water AssociationNatural background0.00 mg/LMay 2026115 servedGreencastle Area Water AuthHealth-study range6.46 mg/LApr 20265,500 servedGreenfield Acres MhpNatural background0.96 mg/LDec 202548 servedGreenfield Twp Muni AuthNatural background0.00 mg/LMay 20262,500 servedGreentop Mobile Home ParkNatural background0.00 mg/LApr 2025120 servedGreenville MhpNatural background0.00 mg/LSep 2025150 servedGregg Township Water AuthorityHuman impact clear3.79 mg/LMay 2026670 servedGretna SpringsNatural background0.94 mg/LDec 2025405 servedGreystone Country EstatesNatural background0.00 mg/LAug 202555 servedGrier SchoolHuman impact likely2.95 mg/LJun 2026450 servedGrims Mobile Home CourtNatural background0.00 mg/LMay 202640 servedGroffdale Mobilehome ParkNatural background0.00 mg/LJan 202698 servedGroninger Farms Arch RockHuman impact likely2.96 mg/LJun 2026175 servedGrove City Boro Water DeptNatural background0.00 mg/LApr 20267,871 servedGuilford Water AuthHuman impact clear4.04 mg/LJun 202628,135 servedGuys Mills Mutual Water AssocHealth-study range5.05 mg/LJun 202699 served
H
Haines Aaronsburg Mun AuthHuman impact likely1.73 mg/LMay 2026550 servedHaines Woodward Municipal AuthNatural background0.00 mg/LMar 2025140 servedHalfmoon Water AssociationNatural background0.00 mg/LMay 2026300 servedHalifax Area Water & Sewer AutHuman impact clear4.14 mg/LMay 20262,278 servedHalifax VillageHuman impact clear3.43 mg/LJun 2026272 servedHamburg Muni Water&Sewer AuthNatural background0.00 mg/LMar 20264,990 servedHamilton Twp Mun Authpurchased waterNatural background0.00 mg/LJan 2026400 servedHamlin Water CompanyNatural background0.00 mg/LDec 2025400 servedHampton Shaler Water AuthorityNatural background0.00 mg/LJul 202561,949 servedHanover Muni Water WorksHuman impact likely1.68 mg/LFeb 202640,900 servedHanover Township Lehigh Countypurchased waterHuman impact likely2.97 mg/LApr 2026520 servedHansons Landing MhpNatural background0.66 mg/LMar 202686 servedHappy Acres DevelopmentHuman impact likely1.68 mg/LAug 2025168 servedHappy HollowHuman impact likely1.33 mg/LDec 202589 servedHardwood EstatesNatural background0.00 mg/LSep 202561 servedHarford Muni Auth Water SystemNatural background0.15 mg/LFeb 2026100 servedHarmar Twp Muni AuthNatural background0.67 mg/LOct 20253,200 servedHarmony Boro Water AuthHuman impact likely1.53 mg/LFeb 20266,669 servedHarmony Estates MhpNatural background0.00 mg/LApr 202580 servedHarrison Twp Water AuthNatural background0.28 mg/LAug 202513,411 servedHarshbarger MhpNatural background0.35 mg/LSep 202590 servedHartslog CourtsNatural background0.00 mg/LApr 202690 servedHartzell Mobilehome ParkNatural background0.00 mg/LMar 202580 servedHarvest Moon Trailer CourtNatural background0.00 mg/LFeb 2026360 servedHastings Muni AuthNatural background0.66 mg/LJul 20252,100 servedHawk Valley VillageHuman impact clear3.62 mg/LApr 2026250 servedHawthorn Redbank Redbank MaNatural background0.62 mg/LApr 20261,500 servedHazel Hurst Water CompanyNatural background0.41 mg/LSep 2025140 servedHca Delano Park PlaceNatural background0.00 mg/LJul 20251,017 servedHca Derringer Fern GlenNatural background0.00 mg/LJul 2025275 servedHca Hazleton DivisionNatural background0.00 mg/LMay 202645,000 servedHca TomhickenNatural background0.00 mg/LJul 2025125 servedHeatherbrooke EstatesHuman impact likely2.97 mg/LFeb 2026410 servedHegins Hubley AuthorityHuman impact likely2.25 mg/LDec 20253,870 servedHeidelberg Acres MhpHuman impact clear4.70 mg/LMay 202690 servedHeidelberg Twp Muni AuthHuman impact clear4.28 mg/LMay 2026975 servedHeidelberg Water Coop CorpHuman impact likely2.31 mg/LMar 202690 servedHellers Mobile Home ParkNatural background0.00 mg/LSep 202521 servedHellertown Borough AuthorityHuman impact clear3.12 mg/LApr 20265,800 servedHemlock Acres CourtHuman impact clear4.98 mg/LJun 2026125 servedHemlock Farms (Main)Human impact likely1.35 mg/LFeb 20268,321 servedHemlock VillageNatural background0.00 mg/LAug 202545 servedHenderson Township Mun AuthNatural background0.00 mg/LAug 2025354 servedHenrietta Mutual Water AssnNatural background0.00 mg/LAug 2025165 servedHereford Est MhpNatural background0.62 mg/LJun 2026710 servedHeritage Est Mobile HomesHealth-study range6.16 mg/LApr 2026330 servedHeritage Hill EstateNatural background0.00 mg/LMar 202690 servedHeritage Hills MhpNatural background0.00 mg/LJul 2025425 servedHeritage Hills Retirement CommNatural background0.42 mg/LJun 202557 servedHeritage Village MhpNatural background0.00 mg/LAug 2025400 servedHerndon Boro Jackson Twp JmaHuman impact clear4.36 mg/LApr 2026432 servedHershey Estates & StorageHuman impact clear4.71 mg/LJun 2026293 servedHi Land MhpHuman impact likely2.66 mg/LMay 202666 servedHi View Mobile Home ParkHuman impact likely1.38 mg/LDec 202597 servedHickory Farm MhpNatural background0.50 mg/LMar 202670 servedHickory Hill Country VillageNatural background0.00 mg/LMar 2025375 servedHickory Hills MhcNatural background0.00 mg/LMay 2026800 servedHidden Valley Mobile Home CtNatural background0.00 mg/LDec 202560 servedHidden Valley Resort LpNatural background0.45 mg/LMar 2026750 servedHidden View EstatesNatural background0.00 mg/LApr 202557 servedHideaway Mobile Home ParkHuman impact clear4.46 mg/LMay 202695 servedHighland CourtHealth-study range7.66 mg/LMay 202654 servedHighland Est MhpHealth-study range5.39 mg/LApr 20261,050 servedHighland S & W Auth BeaverdamNatural background0.30 mg/LJul 202522,617 servedHighland S & W Auth LloydellNatural background0.28 mg/LJul 2025723 servedHighland S&W Auth Northern EndNatural background0.33 mg/LAug 2025463 servedHighland Twp Municipal AuthNatural background0.42 mg/LJul 2025286 servedHighridge Water AuthNatural background0.29 mg/LJun 202616,000 servedHillcrest Communities LpHuman impact likely1.50 mg/LMar 2025350 servedHillendale-On-The-DelawareHealth-study range8.08 mg/LApr 2026150 servedHillsdale Nursing And RehabNatural background0.00 mg/LSep 2025100 servedHillside CondominiumsNatural background0.00 mg/LMar 202565 servedHillside Manor AptsHuman impact likely1.95 mg/LJun 2026144 servedHillside MhpNatural background0.00 mg/LJan 202654 servedHillside Mobile Home ParkNatural background0.00 mg/LMay 202699 servedHillside Rest Home IncHuman impact likely2.15 mg/LJan 202658 servedHillside Terrace MhpNatural background0.00 mg/LJan 2026240 servedHillside View MhpNatural background0.00 mg/LJan 202685 servedHilltop Acres MhpHuman impact clear3.56 mg/LMay 2026120 servedHilltop Mobile EstatesHuman impact likely1.69 mg/LAug 2025220 servedHilltop Village AssociationNatural background0.00 mg/LDec 202586 servedHilltown Twp Water&Sewer AuthHuman impact likely1.70 mg/LDec 20255,770 servedHimalayan InstituteNatural background0.00 mg/LDec 2025124 servedHoffman Homes For Youths IncHuman impact likely1.53 mg/LApr 2026270 servedHollidaysburg Muni Authpurchased waterNatural background0.15 mg/LApr 20268,523 servedHollister Heights MhcHuman impact likely2.17 mg/LOct 202560 servedHolly Acres MhpNatural background0.00 mg/LSep 2025315 servedHoltwood Mobile Home ParkNatural background0.00 mg/LNov 2025196 servedHomeroom Commons ApartmentsHealth-study range5.44 mg/LMay 202634 servedHoney Brook Boro WaterHealth-study range5.98 mg/LApr 20262,892 servedHooversville Boropurchased waterNatural background0.61 mg/LMar 2025645 servedHorsham Water&Sewer AuthorityHuman impact likely1.60 mg/LJun 202626,000 servedHouston Run CommunityHealth-study range6.60 mg/LApr 202650 servedHoutzdale Municipal AuthorityNatural background0.00 mg/LJul 20258,410 servedBorough of HowardHuman impact clear4.18 mg/LMay 20261,001 servedHuefner Spring WaterNatural background0.24 mg/LJan 2026300 servedHughesville Borough Water AuthHuman impact likely1.87 mg/LAug 20252,800 servedHulmeville Municipal Authoritypurchased waterHuman impact clear3.55 mg/LJun 2026750 servedHuntingdon Boro Water DeptNatural background0.00 mg/LMay 202613,776 servedHuston Twp Muni Authpurchased waterNatural background0.00 mg/LMay 2026960 servedHy Vue Acres MhpNatural background0.00 mg/LJul 202562 servedHydetown Park EastHuman impact likely1.88 mg/LJan 202629 servedHydetown Park WestHuman impact likely1.10 mg/LJan 202626 servedHyland MhpNatural background0.41 mg/LDec 202575 servedHyland Mobile Home ParkNatural background0.23 mg/LSep 202556 servedHyndman Boro Water DeptNatural background0.00 mg/LAug 2025910 served
I
Icmsa ArcadiaNatural background0.00 mg/LJun 202665 servedIcmsa CherrytreeNatural background0.00 mg/LJun 2026400 servedIcmsa Coypurchased waterNatural background0.19 mg/LAug 2025650 servedIcmsa Crooked CreekNatural background0.00 mg/LJun 20269,638 servedIcmsa Lucernepurchased waterNatural background0.19 mg/LAug 2025625 servedIcmsa Pine TownshipNatural background0.00 mg/LJun 20261,932 servedIcmsa PlumvilleNatural background0.00 mg/LJun 2026883 servedIcmsa RossiterNatural background0.00 mg/LJun 2026500 servedImperial Mobile Home ParkHealth-study range5.45 mg/LApr 2026151 servedImperial Point Water ServiceNatural background0.00 mg/LAug 20251,500 servedIndependence ParkHuman impact clear4.88 mg/LApr 202691 servedIndependence ParkNatural background0.00 mg/LSep 2025225 servedIndian Creek Valley Water AuthHuman impact likely1.22 mg/LAug 20257,000 servedIndian Lake Boro WaterworksNatural background0.00 mg/LSep 20251,246 servedIndian Lake Camp CorpNatural background0.00 mg/LNov 2025125 servedIndian Run Village MhpHuman impact clear4.84 mg/LMay 2026550 servedIndustry Boro Muni AuthNatural background0.51 mg/LJan 20261,865 servedIrish Creek MhpNatural background0.00 mg/LJun 202690 servedIrvin Manheim MhpHuman impact likely2.94 mg/LJun 202677 servedIrvona Municipal AuthorityNatural background0.00 mg/LJul 20251,980 served
J
J & A MhpHuman impact clear3.41 mg/LNov 2025140 servedJackson MhpNatural background0.52 mg/LDec 2025300 servedJackson Twp Water Authpurchased waterNatural background0.00 mg/LMay 20264,236 servedJames Dorwart AptsHuman impact clear3.50 mg/LJan 2026226 servedJamestown Boro Water AuthNatural background0.00 mg/LJul 2025680 servedJay Twp Water AuthorityNatural background0.00 mg/LMay 20261,131 servedJefferson Estates MhpNatural background0.02 mg/LMar 202657 servedJefferson Twp Water And Sewerpurchased waterNatural background0.60 mg/LAug 2025350 servedJenner Twp Muni Authpurchased waterHuman impact likely1.27 mg/LSep 2025576 servedJennerstown Muni AuthNatural background0.08 mg/LAug 20251,625 servedJersey Shore Area Jnt Wat AuthHuman impact clear3.62 mg/LMay 20266,600 servedJim Thorpe Borough Water EastNatural background0.00 mg/LApr 20262,853 servedJim Thorpe Borough Water WestNatural background0.00 mg/LApr 20262,274 servedJohnsonburg Municipal AuthNatural background0.00 mg/LSep 20252,413 servedJones Twp Municipal AuthorityNatural background0.41 mg/LSep 2025396 servedJubilee MhpHealth-study range7.46 mg/LMay 202630 servedJulia Ribaudo Extended CareNatural background0.67 mg/LFeb 2026200 servedJust A Mere VillageHuman impact likely2.49 mg/LMar 202630 served
K
Ka Middlebury Mobile Home ParkNatural background0.00 mg/LApr 202657 servedKadima At LakesideHuman impact likely2.40 mg/LOct 202591 servedKadima RehabNatural background0.00 mg/LMay 202670 servedKadima Rehab Nursing At LuzernNatural background0.00 mg/LOct 2025100 servedKelleys RentalsNatural background0.00 mg/LJul 202565 servedKellows Mobile Home ParkHealth-study range6.33 mg/LMay 202630 servedKen-Man Water CoHuman impact clear3.45 mg/LDec 2025475 servedKennerdell North Water SystemNatural background0.00 mg/LJul 2025412 servedKennett Square Mun Water WorksHuman impact clear4.08 mg/LApr 20266,328 servedKerryview MhpHuman impact likely2.91 mg/LFeb 202680 servedKeswick PointeHuman impact likely1.23 mg/LAug 202550 servedKeystone Apt LlcNatural background0.00 mg/LJan 2026100 servedKeystone Job Corps CenterHuman impact likely2.34 mg/LApr 2026500 servedKilliam TractNatural background0.00 mg/LDec 202539 servedKingdom Hills Mobile Home ParkNatural background0.88 mg/LJun 202655 servedKings River Haven MhpHuman impact likely2.80 mg/LMay 202695 servedKipps Run Mobile CourtHuman impact likely1.05 mg/LMar 202619 servedKittanning Plumcreek Watr Authpurchased waterHuman impact likely1.66 mg/LMay 2026600 servedKittanning Suburb Jt Water AutNatural background0.67 mg/LFeb 20268,000 servedKline Township Mun AuthorityHuman impact likely1.06 mg/LApr 20266,700 servedKnob Vue EstatesNatural background0.00 mg/LSep 2025150 servedKnox Township Munic AuthorityNatural background0.00 mg/LAug 2025300 servedKnox Water WorksNatural background0.00 mg/LFeb 20261,380 servedKnoxville Water DepartmentNatural background0.00 mg/LJun 2026590 servedKreamer Mun AuthHuman impact likely2.16 mg/LMay 2025980 servedKutztown Borough WaterHuman impact likely2.96 mg/LJul 202614,200 served
L
Laceyville Water CoNatural background0.28 mg/LSep 2025415 servedLake Arthur EstatesNatural background0.00 mg/LSep 2025460 servedLake City Boro Munic WaterHuman impact likely1.93 mg/LSep 20252,935 servedLake Meade Muni AuthHuman impact likely2.57 mg/LJun 20253,221 servedLake of The PinesNatural background0.00 mg/LFeb 20261,200 servedLake Raylean Water AssociationNatural background0.77 mg/LFeb 202647 servedLake Rd Mhp Menu Mate MushroomHealth-study range5.96 mg/LJun 202665 servedLake Wallenpaupack Estates PoaHuman impact likely1.40 mg/LOct 2025204 servedLake Wallenpaupack Sandy ShoreNatural background0.00 mg/LNov 2025499 servedLakeshore Water Assnpurchased waterNatural background0.20 mg/LMay 2026800 servedLakeside MhpNatural background0.00 mg/LDec 202540 servedLakeview Manor MhpNatural background0.00 mg/LSep 2025150 servedLakeview Mobile Home ParkHealth-study range6.10 mg/LApr 2026275 servedLakeview Mobilehome ParkNatural background0.00 mg/LAug 202544 servedLakeview Personal CareNatural background0.17 mg/LJan 2026100 servedCity of LancasterHealth-study range5.68 mg/LApr 2026120,000 servedLancaster EstHuman impact clear3.33 mg/LApr 2026304 servedLandis Homespurchased waterHealth-study range5.68 mg/LApr 2026850 servedLansford Coaldale Jt Water AutNatural background0.00 mg/LJul 20259,300 servedLaporte Boro Mun Water SystemHuman impact likely1.43 mg/LMay 2026325 servedLatrobe Muni AuthNatural background0.00 mg/LSep 202530,000 servedLaurel Health ResourcesHuman impact clear4.67 mg/LMay 2026240 servedLaurel Lane Development AssocHuman impact likely1.60 mg/LOct 2025179 servedLaurel Mountain VillageNatural background0.38 mg/LDec 2025100 servedLaurel Ridgepurchased waterNatural background0.00 mg/LJul 2025105 servedLaurel Run EstatesNatural background0.00 mg/LOct 2025340 servedLaurel Woods Mobile Home ParkNatural background0.00 mg/LOct 202570 servedLaurelwood MhpNatural background0.82 mg/LAug 202535 servedLawrenceville Boro Water DeptNatural background0.00 mg/LMar 2026691 servedLazy Brook ManagementNatural background0.00 mg/LMay 202651 servedLazy K CampgroundNatural background0.00 mg/LJun 202675 servedLca Allentown DivisionHuman impact likely2.97 mg/LApr 2026118,000 servedLca Arcadia West DivisionHuman impact clear3.48 mg/LApr 20261,392 servedLca Beverly Hills DivisionHealth-study range5.06 mg/LApr 2026122 servedLca Clearview Farm Estates DivHuman impact likely2.07 mg/LApr 2026170 servedLca Emmaus Consecutive Divpurchased waterHuman impact clear4.67 mg/LApr 20261,046 servedLca Heidelberg Heights DivNatural background0.00 mg/LMay 2026509 servedLca Madison North DivisionHuman impact likely2.65 mg/LApr 2026290 servedLca Mill Creek DivisionHuman impact clear3.93 mg/LApr 202688 servedLca North Whitehall Divisionpurchased waterHuman impact likely1.08 mg/LJan 20262,910 servedLca Pine Lakes DivisionHuman impact likely1.10 mg/LApr 2026158 servedLca Upper Milford Central DivHealth-study range6.51 mg/LApr 2026256 servedLca Washington Township Divpurchased waterNatural background0.00 mg/LMay 2026965 servedLca Wlsa Central DivisionNatural background0.00 mg/LMay 202647,693 servedLcwsa Halls StationHuman impact likely1.42 mg/LJul 2025518 servedLcwsa Limestone WaterNatural background0.00 mg/LNov 2025825 servedLcwsa Village WaterHuman impact likely1.30 mg/LJul 2025598 servedLeacock Twp Mun AuthHuman impact clear4.17 mg/LApr 20261,640 servedLebanon Valley MhcHuman impact likely2.90 mg/LMar 2026160 servedLebanon Water AuthNatural background0.31 mg/LMay 202657,000 servedLeesburg Water AssociationNatural background0.78 mg/LSep 2025125 servedLeesport Boro Water AuthHealth-study range5.00 mg/LMay 20262,200 servedLehet VillageNatural background0.00 mg/LJul 202540 servedLehigh Twp Muni AuthHuman impact clear4.96 mg/LApr 2026260 servedLehighton Water AuthorityNatural background0.00 mg/LMay 20259,000 servedLehman Home ParkNatural background0.42 mg/LMar 202563 servedLenape Hills Trailer ParkHuman impact likely1.51 mg/LFeb 202644 servedLenwood ParkHealth-study range6.58 mg/LApr 2026230 servedLeraysville Water CompanyNatural background0.00 mg/LSep 2025360 servedLewis Run Boroughpurchased waterNatural background0.23 mg/LApr 2025892 servedLiberty Acres MhpNatural background0.00 mg/LJul 202547 servedLiberty ParkNatural background0.00 mg/LJun 202640 servedLiberty Townshippurchased waterNatural background0.00 mg/LApr 2026138 servedLiberty VillageHuman impact likely2.80 mg/LJan 202640 servedLigonier Twp Muni AuthNatural background0.00 mg/LDec 20253,293 servedLil Wolf MhpHuman impact likely1.07 mg/LApr 2025600 servedLilly Borough Water AuthorityNatural background0.00 mg/LJun 20261,388 servedLimestone Twp Mun Authpurchased waterHealth-study range5.76 mg/LJun 2026200 servedLincoln Twp Muni AuthNatural background0.00 mg/LNov 20251,400 servedLincolnwood MhpHuman impact likely2.82 mg/LJun 2026450 servedLinesville Municipal AuthorityHuman impact clear3.46 mg/LJul 20251,600 servedLititz BoroHealth-study range5.88 mg/LJul 20269,397 servedLittle Acres MhpNatural background0.00 mg/LMay 202630 servedLittle Britain MhpHuman impact clear3.77 mg/LJun 202660 servedLittle Creek Estates M H PNatural background0.00 mg/LApr 202660 servedLittlestown BoroHuman impact likely1.64 mg/LMay 20267,300 servedLiverpool Muni AuthHealth-study range7.50 mg/LApr 2026934 servedLlewellyns MhpHuman impact clear4.20 mg/LJan 2026250 servedLoags Corner Mobile Home ParkHuman impact likely2.42 mg/LApr 2026130 servedLocust Grove MhpHuman impact clear4.07 mg/LFeb 202649 servedLocust Grove Retirement HomeNatural background0.16 mg/LJun 2026177 servedLocust Manor MhpHuman impact clear3.00 mg/LAug 202565 servedLocustwood Mobilehome ParkHuman impact clear4.45 mg/LJun 202681 servedLog Cabin CourtHuman impact likely2.96 mg/LMay 2026175 servedLog Road VillageNatural background0.00 mg/LDec 202568 servedLoganton Boro Water SystemNatural background0.00 mg/LJul 2025402 servedLondon Grove Twp Mun Authpurchased waterHuman impact likely1.77 mg/LJun 20264,770 servedLondonderry Court Mhppurchased waterHuman impact likely1.77 mg/LJun 2026160 servedLondonderry Twp Water Syspurchased waterHuman impact clear4.23 mg/LMay 202636 servedLongwood GardensHuman impact likely2.11 mg/LApr 2026440 servedLoretto Boro Water Syspurchased waterNatural background0.00 mg/LSep 2025480 servedLovetts Mobile Home ParkNatural background0.00 mg/LDec 202577 servedLower Bucks Co Joint Mun AuthNatural background0.00 mg/LMar 202663,007 servedLower Mahanoy Twp Mun AuthNatural background0.00 mg/LFeb 2026450 servedLower Saucon Authoritypurchased waterNatural background0.00 mg/LAug 20255,700 servedLoyalsock Mobile Home ParkHuman impact clear4.45 mg/LMar 202685 servedLoyalton Water AssnHealth-study range5.30 mg/LMay 2026100 servedLoysville Youth Dev CtrHuman impact clear3.44 mg/LApr 2026249 servedLudlow County Line SystemNatural background0.00 mg/LAug 202581 servedLudlow Warner SystemNatural background0.00 mg/LAug 202576 servedLupfers Grove Mhp & CpgrdNatural background0.00 mg/LAug 202555 servedLutheran Home At ToptonNatural background0.00 mg/LMay 2026410 servedLycoming Creek VillageHuman impact likely2.54 mg/LFeb 202638 servedLykens Boro AuthHuman impact likely1.54 mg/LDec 20253,220 servedLynwood Acres Mobile Home ParkNatural background0.00 mg/LApr 202677 servedLyons BoroHuman impact likely2.66 mg/LApr 2026500 served
M
Macungie Borough AuthorityHuman impact likely2.37 mg/LMay 20263,039 servedMacungie Village MhpHuman impact likely2.79 mg/LJan 202665 servedMadison EstatesHuman impact likely2.19 mg/LOct 202560 servedMadisonburg Water WorksNatural background0.00 mg/LJul 2025250 servedMagic Chef MhpHuman impact likely2.10 mg/LJun 202632 servedMagnolia MhpHuman impact clear4.30 mg/LApr 202675 servedMagnolia Personal Care CenterHuman impact likely2.35 mg/LApr 202680 servedMahanoy Twp AuthNatural background0.00 mg/LMay 20255,584 servedMahoning Manor EstatesNatural background0.77 mg/LJun 202690 servedMahoning Townshippurchased waterNatural background0.05 mg/LJun 20261,032 servedMahoning Twp Muni Authpurchased waterNatural background0.43 mg/LApr 2026900 servedMahoning Valley Convalescent HNatural background0.00 mg/LJan 2026145 servedMaidencreek Twp Water AuthHealth-study range5.55 mg/LJul 20267,505 servedMajestic HeightsNatural background0.00 mg/LJul 2025110 servedMajors Mobilehome ParkHuman impact clear4.94 mg/LApr 202655 servedMalvern Courts MhpHuman impact likely1.39 mg/LJul 2026250 servedManheim Area Water & Sewer AutHealth-study range6.20 mg/LMay 20266,701 servedManor Twp Jt Muni AuthHuman impact likely1.66 mg/LMay 20266,744 servedMansfield Borough Mun AuthNatural background0.00 mg/LAug 20254,100 servedMansfield UniversityNatural background0.00 mg/LJun 20263,000 servedMaple Lane EstatesNatural background0.06 mg/LNov 2024200 servedMaple Manor MhpNatural background0.00 mg/LAug 202537 servedMaple Park Garden ApartmentsNatural background0.00 mg/LJan 202675 servedMaple Rock Trailer CourtNatural background0.00 mg/LJan 2026100 servedMapleton Muni Water AuthNatural background0.00 mg/LDec 2025570 servedMaplewood HeightsNatural background0.00 mg/LNov 202532 servedMaplewood Mobile Home ParkHealth-study range8.23 mg/LJun 202670 servedMarianna Muni Water Workspurchased waterNatural background0.46 mg/LAug 2025480 servedMarion Twp Water Syspurchased waterHuman impact likely1.12 mg/LNov 2025700 servedMarion Twp WtpNatural background0.00 mg/LJul 2025225 servedMars Borough Water WorksNatural background0.00 mg/LJun 20261,956 servedMarsteller Comm Water AuthNatural background0.34 mg/LJul 202575 servedMartins Community Lp MhpHuman impact clear4.04 mg/LJun 2026180 servedMartinsburg Muni AuthHuman impact clear4.49 mg/LApr 20263,160 servedMary D Community AssociationNatural background0.00 mg/LSep 2025250 servedMasonic HomesHealth-study range8.60 mg/LApr 20263,707 servedMasons Mobile CityNatural background0.00 mg/LFeb 2025140 servedMasontown Muni Water Workspurchased waterNatural background0.46 mg/LAug 20253,841 servedMawc Furnace Runpurchased waterNatural background0.00 mg/LFeb 20263,100 servedMawc Sweeney PlantNatural background0.59 mg/LJul 2025143,000 servedMawc Yough PlantHuman impact likely1.01 mg/LJan 2025133,000 servedMaxatawny Twp Muni AuthHuman impact clear3.82 mg/LApr 2026425 servedMcalisterville Area Joint AuthHuman impact clear4.70 mg/LJun 2026850 servedMcclure Municipal AuthorityNatural background0.00 mg/LApr 2026845 servedMcconnellsburg Boro Muni AuthHuman impact clear3.09 mg/LJun 20262,000 servedMckean Twp Waterworkspurchased waterNatural background0.20 mg/LMay 20261,048 servedMcma HawstoneNatural background0.00 mg/LJul 202560 servedMcveytown Boro AuthNatural background0.00 mg/LJul 2025478 servedMeadow Brook M H PNatural background0.00 mg/LFeb 2026224 servedMeadowbrook Mobile HomesHuman impact likely2.07 mg/LJun 202660 servedMeadows At Bethel MhpHuman impact likely2.09 mg/LAug 202550 servedMeadows Mobile Home ParkNatural background0.02 mg/LFeb 2026250 servedMeadville Area Water AuthorityNatural background0.13 mg/LMay 202617,339 servedMeadville Housing NorthgateNatural background0.00 mg/LSep 2025256 servedMehoopany Twp Municipal AuthNatural background0.63 mg/LJan 202685 servedMelanie Manor Mobile Home ParkHuman impact likely1.04 mg/LMay 2026110 servedMercersburg Muni Water AuthNatural background0.00 mg/LSep 20252,350 servedMeshoppen Borough Water CoNatural background0.17 mg/LApr 2025563 servedMeshoppen Townhouse AptsNatural background0.00 mg/LAug 202565 servedMeyersdale Muni AuthNatural background0.00 mg/LJan 20262,566 servedMid Lakes DevelopmentNatural background0.00 mg/LMar 2026490 servedMiddleburg Municipal AuthorityNatural background0.00 mg/LMar 20261,600 servedMiddlesex Twp Muni AuthHealth-study range8.50 mg/LApr 20263,527 servedMidland Boro Muni AuthNatural background0.75 mg/LJun 20253,100 servedMifflin Cnty Muni AuthHuman impact likely1.63 mg/LJul 202529,432 servedMifflinburg Boro Water DeptHealth-study range5.76 mg/LJun 20263,690 servedMifflintown Muni AuthNatural background0.00 mg/LJul 20254,450 servedMiles Twp Water Auth EastHuman impact likely1.22 mg/LMay 2025425 servedMilesburg Borough Water AuthHuman impact likely2.11 mg/LJun 20262,750 servedMilford Senior CareHuman impact likely1.79 mg/LJun 2026110 servedMilford Twp Munic AuthNatural background0.00 mg/LDec 202375 servedMilford Twp Water AuthorityHuman impact likely1.95 mg/LAug 20254,497 servedMilford Water AuthorityNatural background0.58 mg/LSep 20252,420 servedMill Creek Area Mun AuthNatural background0.00 mg/LDec 20251,108 servedMillbrook 5R 7 8Natural background0.00 mg/LDec 2025169 servedMillbrooke EstHuman impact likely2.15 mg/LApr 202698 servedMiller Manor Homeowners AssocHealth-study range6.82 mg/LJun 202690 servedMillers Edgewood MhpNatural background0.00 mg/LApr 202678 servedMillersburg Water AuthHuman impact likely2.26 mg/LJun 20264,600 servedMillerstown Boro WaterHuman impact likely2.60 mg/LMay 2026700 servedMillersville UnivHealth-study range5.69 mg/LApr 20267,950 servedMillfair Heights Water SystemNatural background0.87 mg/LJul 2025390 servedMillheim Borough Water CompanyNatural background0.00 mg/LMay 2026902 servedMillville Municipal AuthorityHuman impact likely1.09 mg/LJun 2026969 servedMinersville Municipal Water AuNatural background0.00 mg/LAug 20257,275 servedMiracle Mountain RanchNatural background0.00 mg/LJul 202598 servedMitchell Lake Mobile Home ParkNatural background0.00 mg/LJul 2025100 servedMonaca Boro Water DeptNatural background0.19 mg/LSep 20256,500 servedMonger Mobilehome ParkHuman impact clear4.24 mg/LMar 202648 servedMonroe County Correctional FacNatural background0.00 mg/LJan 2026740 servedMonroe Valley MhpNatural background0.00 mg/LMar 202697 servedMonroeville Municipal Authpurchased waterNatural background0.59 mg/LJul 202548,500 servedMont Alto Municipal AuthorityNatural background0.00 mg/LJun 20261,705 servedMontgomery Water AuthorityHuman impact clear3.32 mg/LAug 20252,700 servedMontoursville Water CompanyHuman impact clear3.15 mg/LAug 20254,983 servedMonument Water AuthorityNatural background0.00 mg/LSep 2025140 servedMoon Twp Muni AuthNatural background0.52 mg/LAug 202538,000 servedMoon Valley FallsNatural background0.00 mg/LOct 2025120 servedMorrisville Munic AuthorityHuman impact likely1.11 mg/LFeb 202613,342 servedMoscow Dev AssocHuman impact likely2.98 mg/LOct 202580 servedMount Airy MhpHealth-study range5.90 mg/LApr 202650 servedMount Eagle Water AssocNatural background0.00 mg/LMay 2026130 servedMount Rock ManorAbove the federal limit10.38 mg/LApr 2026350 servedMount Trexler ManorHuman impact clear3.02 mg/LDec 202590 servedMountain Crest DevelopmentNatural background0.00 mg/LDec 202544 servedMountain Manor CommunityNatural background0.00 mg/LNov 2025187 servedMountain Springs MhpHuman impact likely1.21 mg/LJan 2026215 servedMountain View EstatesNatural background0.53 mg/LApr 202680 servedMountain View MhpHuman impact clear4.22 mg/LJan 2026180 servedMountain View TerraceHuman impact likely2.01 mg/LApr 2026117 servedMountain View VillageNatural background0.00 mg/LSep 2025100 servedMountain Water AssnNatural background0.00 mg/LOct 20253,856 servedMountain Water AuthorityNatural background0.53 mg/LJun 2026495 servedMountaindale ApartmentsNatural background0.06 mg/LJan 202650 servedMountaintop Mobilehome ParkHuman impact clear4.21 mg/LJan 2026115 servedMountaintop Reg Water AuthNatural background0.00 mg/LMay 20263,456 servedMountainview MhpHuman impact likely1.71 mg/LMar 2026335 servedMrs Bushs Personal Care HomeNatural background0.00 mg/LMar 202670 servedMt Gretna AuthHuman impact likely1.00 mg/LAug 2025485 servedMt Gretna Campmeeting AssnNatural background0.82 mg/LAug 2025375 servedMt Gretna Heights Water SysNatural background0.00 mg/LAug 2025125 servedMt Holly Springs Boro AuthHuman impact likely1.54 mg/LOct 20253,261 servedMt Hope Nazarene Ret CommHealth-study range5.19 mg/LMay 2026141 servedMt Idy Mobile Home ParkHuman impact clear3.47 mg/LJan 202680 servedMt Joy Boro AuthHuman impact clear3.58 mg/LJun 202615,261 servedMt Laurel Mobile Home VillageNatural background0.79 mg/LFeb 2025120 servedMt Morris Water & Sewage Authpurchased waterNatural background0.46 mg/LAug 20251,500 servedMt Penn Boro Muni AuthHuman impact likely2.35 mg/LMar 202610,400 servedMt Union Municipal AuthHuman impact likely1.12 mg/LApr 20265,801 servedMt View Terrace MhpNatural background0.00 mg/LMar 2026179 servedMt Village MhpHuman impact likely1.10 mg/LJun 2026771 servedVillage of Mtn Heights MhpHuman impact likely1.52 mg/LOct 202576 servedMuhlenberg Twp Muni AuthHuman impact clear4.91 mg/LApr 202621,000 servedMun Auth of Boro of BedfordNatural background0.00 mg/LJan 20255,127 servedMun Water Auth of AliquippaNatural background0.52 mg/LJan 202615,685 servedMuncy Borough Water CompanyHuman impact clear4.22 mg/LMay 20262,900 servedMuncy State Correctional InstNatural background0.99 mg/LSep 20252,050 servedMuni Auth of Boro of MatamorasHuman impact likely1.19 mg/LDec 20252,900 servedMuni Auth of Washington TwpNatural background0.35 mg/LJun 20269,100 servedMunicipal Authority of CorryHuman impact likely1.23 mg/LDec 20257,800 servedMunicipal Authority SunburyNatural background0.45 mg/LJun 202611,043 servedMunicipal Water Auth Adams Twppurchased waterNatural background0.80 mg/LJan 20268,700 servedMushroom FarmNatural background0.00 mg/LAug 2025172 servedMyerstown Water AuthHuman impact clear3.77 mg/LJul 20259,500 served
N
N Annville MhpNatural background0.82 mg/LSep 202572 servedN E Trailer CourtNatural background0.10 mg/LJun 202681 servedNanty Glo Water AuthHuman impact likely1.94 mg/LFeb 20263,152 servedNathans HamletNatural background0.00 mg/LMar 202660 servedNational Pike Water AuthNatural background0.00 mg/LJul 20252,800 servedNeelyton Water CoopNatural background0.00 mg/LJun 202657 servedNeighbors of Penn LakeNatural background0.00 mg/LJul 202554 servedNelson Township AuthorityNatural background0.00 mg/LAug 2025300 servedNemacolin WoodlandsNatural background0.00 mg/LApr 20261,300 servedVillage of Neshaminy Fallspurchased waterHuman impact clear3.55 mg/LJun 20261,300 servedNeshaminy Manor Centerpurchased waterNatural background0.00 mg/LJun 20262,100 servedNesquehoning Boro Water AuthNatural background0.78 mg/LJul 20252,850 servedNeville Twp Water Deptpurchased waterNatural background0.80 mg/LJan 20266,750 servedNevilles Mobile Home CourtHuman impact likely1.28 mg/LDec 202585 servedNew Albany Water Fundpurchased waterHuman impact likely1.79 mg/LAug 2025336 servedNew Berlin Municipal AuthorityHuman impact likely1.43 mg/LMar 2026990 servedNew Castle EstatesNatural background0.00 mg/LJul 202580 servedNew Enterprise Water AssnHealth-study range6.39 mg/LJun 2026443 servedNew Freedom Boro Water AuthHuman impact clear4.11 mg/LMay 20264,464 servedNew Holland BoroughHealth-study range5.41 mg/LMay 20268,490 servedNew Kensington Muni AuthNatural background0.57 mg/LJul 202547,800 servedNew Life For GirlsNatural background0.72 mg/LAug 202580 servedNew Meadow RunNatural background0.00 mg/LAug 2025300 servedNew Milford Municipal AuthNatural background0.00 mg/LApr 2026979 servedNew Oxford Manor MhpHuman impact likely1.09 mg/LDec 2025350 servedNew Oxford MhcHuman impact clear4.10 mg/LApr 2026437 servedNew Oxford Munci AuthHuman impact likely2.94 mg/LAug 20253,963 servedNew Sewickley Twp Muni Authpurchased waterNatural background0.80 mg/LJan 20264,276 servedNew Wilmington Boro Water Deptpurchased waterNatural background0.00 mg/LApr 20264,500 servedNewberry EstHealth-study range5.77 mg/LApr 2026200 servedNewell Muni AuthNatural background0.30 mg/LAug 2025520 servedNewmanstown Water AuthHuman impact clear4.31 mg/LJul 20262,335 servedNewport Boro Water AuthHuman impact likely2.70 mg/LJun 20263,200 servedNewton Hamilton Boropurchased waterHuman impact likely1.12 mg/LApr 2026270 servedNewtown Artesian Water CoHuman impact likely2.88 mg/LApr 202638,500 servedNewtown Hill Trailer ParkNatural background0.00 mg/LJun 202650 servedNewville Boro Water AuthHealth-study range6.94 mg/LApr 20262,070 servedNicholson Boro AuthNatural background0.16 mg/LFeb 2026789 servedNis Hollow EstatesNatural background0.00 mg/LApr 2026265 servedNittany Grove Condo Comm AssnHuman impact likely1.64 mg/LMay 202645 servedNolts Red Maple MhpHealth-study range5.30 mg/LJun 202651 servedNorth Coventry Water Systempurchased waterHuman impact likely2.31 mg/LMay 20262,907 servedNorth East Borough Water DeptNatural background0.00 mg/LSep 20254,601 servedNorth East Township Waterpurchased waterNatural background0.00 mg/LSep 20255,848 servedNorth Fayette Cnty Muni AuthNatural background0.52 mg/LJul 202535,409 servedNorth Penn Water AuthorityHuman impact likely2.96 mg/LApr 202691,941 servedNorth Sewickley Mun Water Authpurchased waterHuman impact likely1.12 mg/LNov 20254,578 servedNorth Star VillageNatural background0.00 mg/LJul 202560 servedNorth Wales Water AuthorityHuman impact clear3.55 mg/LJun 202672,496 servedNorth Warren Muni AuthorityHuman impact likely1.97 mg/LAug 20251,749 servedNorthampton Boro Muni AuthHuman impact likely1.08 mg/LJan 202640,000 servedNorthampton Bucks Co Mun AuthHuman impact clear3.39 mg/LDec 202536,750 servedNorthern Cambria Muni WaterNatural background0.00 mg/LJul 20254,500 servedNorthern Tier Childrens HomeNatural background0.22 mg/LJun 202545 servedNorthridge At CamelbackNatural background0.00 mg/LMay 2026330 servedNorthside Heights EstatesNatural background0.00 mg/LApr 2026461 servedNorthwestern Lancaster Co AuthHuman impact likely1.48 mg/LJul 20262,968 servedNottingham Manor M H CourtHealth-study range8.26 mg/LJun 2026473 servedNuremburg Water Co VeoliaHuman impact likely1.35 mg/LAug 2025340 servedNwwa Durham VillageHealth-study range5.55 mg/LJun 2026160 servedNwwa HermitageHuman impact clear3.49 mg/LMay 202675 servedNwwa Ingham MewsHuman impact likely2.60 mg/LMay 202697 servedNwwa Olde Colonial GreeneHuman impact likely2.95 mg/LMay 2026900 servedNwwa Pine RunHuman impact likely1.30 mg/LMay 2026700 servedNwwa Warrington TownshipNatural background0.00 mg/LJun 202621,588 servedNwwa Yorkshire MeadowsHuman impact likely2.23 mg/LMay 202690 served
O
O Yes AptsHuman impact likely2.40 mg/LApr 202635 servedOak Grove Park MhpHuman impact likely1.14 mg/LAug 2025130 servedOak Knoll Est MhpHealth-study range8.74 mg/LApr 2026350 servedOak Lynn Manor Mobile Home PkHuman impact likely2.25 mg/LMar 2026250 servedOak Manor EstatesNatural background0.00 mg/LFeb 202650 servedOak Ridge AuthorityNatural background0.00 mg/LApr 2026700 servedOak Run VillageNatural background0.00 mg/LJan 202660 servedOak VillageHuman impact clear3.19 mg/LAug 2025225 servedOakdale Boro Water Deptpurchased waterNatural background0.62 mg/LAug 20251,459 servedOakland Borough Water AuthNatural background0.00 mg/LJul 2025563 servedOakland Trailer ParkNatural background0.53 mg/LDec 202590 servedOakmont Water AuthorityNatural background0.51 mg/LNov 202539,901 servedOakridge ParkHuman impact likely1.94 mg/LApr 202675 servedOakwood Heights MhpHuman impact likely1.80 mg/LJun 202654 servedOakwood Lake Village MhpHuman impact likely1.38 mg/LJan 2026273 servedOhioville Boro Muni Authpurchased waterHuman impact likely1.82 mg/LAug 20252,750 servedOil CityNatural background0.36 mg/LFeb 20269,608 servedOld Orchard AptsHuman impact likely1.27 mg/LAug 202538 servedOld Orchard SubdivisionHuman impact clear3.32 mg/LApr 202696 servedOley Twp Muni AuthHuman impact likely2.33 mg/LJun 20262,204 servedOlympic VillageNatural background0.28 mg/LDec 202598 servedOntelaunee Townshippurchased waterNatural background0.00 mg/LJul 20262,598 servedOrangeville Municipal Water AuHuman impact likely1.86 mg/LJan 2026508 servedOrbisonia Rockhill Jt Mun AuthNatural background0.00 mg/LJun 20261,200 servedOrchard East Water AssocNatural background0.00 mg/LMar 202585 servedOrchard Grove MhpHuman impact likely2.46 mg/LFeb 202666 servedOrchard Hills AptsHuman impact likely1.56 mg/LJun 2026499 servedOrchard Hills MhpNatural background0.00 mg/LApr 2026303 servedOrchard Mobile Home ParkHuman impact likely2.59 mg/LMar 2026325 servedOrchard West Water AssocNatural background0.00 mg/LMar 202590 servedOre Hill Water AssnHuman impact clear4.06 mg/LJul 202580 servedOrviston Water Assoc IncNatural background0.00 mg/LMay 202672 servedOrwigsburg Municipal Water WksNatural background0.00 mg/LJul 20253,000 servedOsceola Twp Municipal AuthoritNatural background0.00 mg/LAug 2025400 servedOssies Mobile Home CommunityNatural background0.00 mg/LMay 202540 servedOsterburg Water CoNatural background0.00 mg/LSep 2025250 servedOverpeck MhpHuman impact clear3.65 mg/LMay 202625 servedOxford BoroughHuman impact clear4.84 mg/LApr 20265,280 served
P
Pa Amer Water CoHuman impact clear3.97 mg/LFeb 202650,200 servedPa Amer Water Co BrownellNatural background0.00 mg/LMay 202612,560 servedPa Amer Water Co Ellwood CtyHuman impact likely1.88 mg/LOct 202517,200 servedPa Amer Water Co FallbrookNatural background0.00 mg/LMay 20262,851 servedPa Amer Water Co Forest CityNatural background0.21 mg/LMay 20263,188 servedPa Amer Water Co Indian RocksNatural background0.40 mg/LAug 20251,100 servedPa Amer Water Co Lake HeritageHuman impact clear3.03 mg/LJan 20261,648 servedPa Amer Water Co Lake ScrantonNatural background0.22 mg/LMay 2026134,570 servedPa Amer Water Co MontroseNatural background0.63 mg/LApr 20261,890 servedPa Amer Water Co New CastleNatural background0.52 mg/LAug 202543,279 servedPa Amer Water Co Olwen HeightsHuman impact likely1.50 mg/LJul 2025330 servedPa Amer Water Co SpangenbergNatural background0.74 mg/LAug 2025370 servedPa Amer Water Co SusquehannaHuman impact likely1.28 mg/LApr 20264,230 servedPa Amer Water Co-PittsburghNatural background0.62 mg/LAug 2025686,000 servedPa Amer Water ThompsonHuman impact likely1.23 mg/LMay 2026225 servedPa American AudubonHuman impact likely2.76 mg/LJun 20268,200 servedPa American CoatesvilleHuman impact likely2.68 mg/LApr 202636,960 servedPa American Dilliner SystemNatural background0.21 mg/LJul 20254,200 servedPa American McewensvilleHuman impact clear4.51 mg/LApr 2026282 servedPa American NorristownHuman impact likely2.55 mg/LApr 202688,885 servedPa American RoyersfordHuman impact clear4.48 mg/LMay 202649,508 servedPa American TurbotvilleHealth-study range5.19 mg/LMay 2026705 servedPa American Water BerwickHuman impact clear3.77 mg/LApr 202615,282 servedPa American Water Co ButlerNatural background0.98 mg/LApr 202643,286 servedPa American Water Co ClarionNatural background0.35 mg/LApr 202616,600 servedPa American Water Co KaneNatural background0.53 mg/LApr 20265,725 servedPa American Water Co WarrenNatural background0.27 mg/LAug 202514,650 servedPa American Water Co WestHuman impact clear3.23 mg/LApr 2026105,127 servedPa American Water Co YardleyHuman impact likely2.29 mg/LJun 202633,171 servedPa American Water Co-Indiana DHuman impact likely1.37 mg/LApr 202622,360 servedPa American Water KittanningNatural background0.48 mg/LApr 20264,617 servedPa American Water PunxsyNatural background0.01 mg/LApr 20268,800 servedPa American Water SteeltonNatural background0.39 mg/LMay 20266,428 servedPa American White DeerNatural background0.77 mg/LJan 202630,209 servedPa-American Water Co-Connellsvpurchased waterHuman impact likely1.22 mg/LAug 202511,425 servedPa-American Water- Uniontownpurchased waterNatural background0.22 mg/LJul 202523,125 servedPa-American Water-BrownsvilleNatural background0.22 mg/LJul 20257,844 servedPalm City ParkHealth-study range5.30 mg/LJun 2026490 servedPalmer Shore WaterNatural background0.63 mg/LAug 2025150 servedPalmerton Municipal AuthorityHuman impact likely2.10 mg/LApr 20267,000 servedPanorama MhpHuman impact clear3.99 mg/LMar 202670 servedParadise MeadowsHuman impact clear3.27 mg/LOct 202590 servedParadise MhpNatural background0.84 mg/LJan 2026550 servedParadise PointHuman impact likely1.30 mg/LDec 2025300 servedParamount Senior LivingNatural background0.52 mg/LJun 2026250 servedPark Road EstHuman impact clear3.19 mg/LJan 202629 servedParker Area Water AuthNatural background0.07 mg/LJul 2025900 servedParkhouse Nursing & Rehab CtrHuman impact clear3.80 mg/LMay 20261,200 servedParks Twp Muni Authpurchased waterNatural background0.59 mg/LJul 20252,049 servedParkwood MhpNatural background0.00 mg/LDec 2025100 servedPathwaysHuman impact likely2.32 mg/LOct 202553 servedPatton Boro Water DeptNatural background0.00 mg/LAug 20251,805 servedPaupack Point Water AssocNatural background0.00 mg/LJul 2025180 servedPaw Bangor DistrictNatural background0.03 mg/LAug 20259,008 servedPaw Berry HollowNatural background0.01 mg/LAug 202570 servedPaw Blue Mountain DivisionNatural background0.04 mg/LAug 202523,763 servedPaw BoggsHuman impact likely2.67 mg/LApr 2026100 servedPaw CeasetownNatural background0.10 mg/LApr 202658,467 servedPaw Crystal LakeNatural background0.02 mg/LApr 20269,773 servedPaw FrackvilleHuman impact likely1.33 mg/LJan 20265,583 servedPaw Glen Alsace DivHuman impact clear3.48 mg/LMay 202624,951 servedPaw Golden OaksHuman impact likely2.31 mg/LMay 2026100 servedPaw HillcrestNatural background0.37 mg/LApr 2026125 servedPaw HomesiteHuman impact likely1.91 mg/LApr 202669 servedPaw HuntsvilleNatural background0.13 mg/LApr 202611,987 servedPaw NesbittNatural background0.24 mg/LApr 202652,640 servedPaw NittanyHuman impact likely2.55 mg/LJul 20251,499 servedPaw Penn DistrictHuman impact likely1.11 mg/LApr 202628,508 servedPaw PhilipsburgNatural background0.20 mg/LApr 202620,784 servedPaw Sutton HillsNatural background0.00 mg/LApr 2026195 servedPaw WatresNatural background0.21 mg/LApr 202652,002 servedPaw Wildcat ParkNatural background0.09 mg/LApr 202673 servedPaw WinolaNatural background0.72 mg/LMay 2026130 servedPawc All Seasons SystemNatural background0.00 mg/LApr 2026100 servedPawc Appalachian DistHuman impact likely2.87 mg/LFeb 20263,000 servedPawc Blue Mt LakeNatural background0.01 mg/LApr 20261,753 servedPawc ManwalaminkNatural background0.48 mg/LJun 20263,200 servedPawc Manwalamink Ns 1&2Natural background0.30 mg/LMay 2026600 servedPawc Manwalamink Ns 3Natural background0.00 mg/LMay 20261,100 servedPawc Marcel LakesNatural background0.26 mg/LMay 20261,048 servedPawc Mid MonroeNatural background0.07 mg/LApr 20261,580 servedPawc Milford LandingNatural background0.34 mg/LApr 2026468 servedPawc Pine Ridge SystemHuman impact likely2.19 mg/LMay 20262,450 servedPawc Pocono DistrictHuman impact clear4.11 mg/LJan 202617,860 servedPawc Saw Creek EstatesNatural background0.25 mg/LMay 20267,016 servedPawc Wild AcresNatural background0.78 mg/LApr 20262,943 servedPeaceful Acres TrailersHuman impact likely1.62 mg/LAug 2025165 servedPeddlers VillageHuman impact likely1.40 mg/LAug 2025960 servedPediatric Specialty CareHuman impact likely1.75 mg/LAug 202556 servedPenn Estates Utilities IncorpNatural background0.00 mg/LApr 20264,300 servedPenn State UnivHuman impact likely1.64 mg/LJun 202537,000 servedPenn Township Municipal AuthHuman impact clear3.77 mg/LNov 2025672 servedPenn Twp Water DistNatural background0.00 mg/LSep 2025300 servedPenn Valley VillageHuman impact clear3.11 mg/LMay 2026225 servedPennland FarmsNatural background0.00 mg/LApr 2026452 servedPenns Creek Municipal AuthHuman impact likely2.10 mg/LDec 2025725 servedPennwood Estates MhpNatural background0.02 mg/LMar 202651 servedPenny ParkAbove the federal limit15.83 mg/LMay 202651 servedPequea Water Coop AssnAbove the federal limit10.29 mg/LMay 2026121 servedPerkasie Regional AuthorityNatural background0.00 mg/LAug 202515,000 servedPerkiomen CrossingHuman impact likely2.81 mg/LApr 2026508 servedPerlo Ridge AptsHuman impact likely2.31 mg/LApr 202642 servedPerry Lake EstatesNatural background0.05 mg/LJan 202644 servedPerry Phillips Mobile HomesHuman impact likely2.78 mg/LApr 202660 servedPerry Twp Muni AuthHuman impact clear4.64 mg/LApr 2026145 servedPerry Twp Municipal AuthHuman impact likely1.22 mg/LApr 2026285 servedPerryville Water AssociationHuman impact likely1.14 mg/LAug 2025120 servedPetersburg Bor Water AuthNatural background0.00 mg/LOct 2025650 servedPetersburg Commons Water Systepurchased waterHealth-study range5.32 mg/LApr 2026100 servedPetroleum Valley Rwapurchased waterHuman impact likely2.41 mg/LMay 20263,800 servedPhiladelphia Water DepartmentHuman impact likely2.88 mg/LJun 20261,600,000 servedPhoenixville Water DeptHuman impact likely2.85 mg/LMay 202616,599 servedPike County Correctional FacilNatural background0.00 mg/LSep 2025500 servedPike Twp Municipal AuthorityNatural background0.00 mg/LJul 20254,500 servedPillow Boro AuthHuman impact clear4.22 mg/LMay 2026312 servedPine Garden ApartmentsNatural background0.00 mg/LJul 202540 servedPine Grove Boro Water SystemNatural background0.11 mg/LJul 20252,711 servedPine Grove EstatesNatural background0.00 mg/LDec 2025263 servedPine Grove Mobile Home ParkNatural background0.00 mg/LSep 2025244 servedPine Grove Twp Water SystemNatural background0.00 mg/LAug 2025640 servedPine Manor MhpHuman impact likely2.39 mg/LApr 2026302 servedPine Terrace Mobile Home ParkHuman impact likely2.66 mg/LMar 202650 servedPine Twp Water Distr Systempurchased waterNatural background0.00 mg/LApr 20263,082 servedPine Valley EstatesNatural background0.32 mg/LSep 202593 servedPine Valley Mobile Home CourtHuman impact likely1.47 mg/LDec 2025425 servedPinecrest Village MhpHuman impact clear3.04 mg/LApr 2025195 servedPinedale Mobile Home ParkNatural background0.00 mg/LJul 202580 servedPinehurst ManorHuman impact likely2.43 mg/LFeb 202647 servedPinehurst Manor MhpNatural background0.21 mg/LJul 202586 servedPinehurst Mobile EstatesNatural background0.00 mg/LAug 2025130 servedPithole Water AssociationNatural background0.00 mg/LFeb 202587 servedPittsburgh Water & Sewer AuthNatural background0.38 mg/LMay 2026520,000 servedPlateau Village MhpHuman impact likely1.32 mg/LMar 2025125 servedPleasant Hall ManorNatural background0.00 mg/LOct 202550 servedVillage of Pleasant HillHuman impact clear4.96 mg/LMay 2026650 servedPleasant Run MhpHuman impact likely1.85 mg/LJan 202632 servedPleasant Valley MhpNatural background0.64 mg/LAug 2025270 servedPleasant Valley Water Authpurchased waterHuman impact likely1.22 mg/LAug 20253,630 servedPleasant View Lakes PoaNatural background0.00 mg/LNov 2025389 servedPleasant View MhpHuman impact likely1.17 mg/LJun 202699 servedPleasant Village MhpNatural background0.00 mg/LJan 202640 servedPleasantville Borough Waterpurchased waterNatural background0.61 mg/LJul 2025846 servedPlum Boro Muni Authpurchased waterNatural background0.59 mg/LJul 202527,500 servedPlum Creek Municipal AuthHuman impact likely1.48 mg/LApr 20262,500 servedPlumer Water Companypurchased waterNatural background0.28 mg/LAug 2025185 servedPlumstead Northern SystemNatural background0.00 mg/LApr 20262,605 servedPlumstead Twp Durham RidgeNatural background0.00 mg/LApr 2026714 servedPlumstead Twp Patriots Ridgepurchased waterHuman impact clear3.55 mg/LJun 20261,704 servedPlumstead Twp Summer Hill MeadNatural background0.00 mg/LJul 20251,284 servedPoc Mtn Lake Est Sect 1ENatural background0.00 mg/LMay 2026140 servedPoco Apartments (Lower)Natural background0.35 mg/LMar 202548 servedPoco Apartments (Upper)Natural background0.44 mg/LMar 202536 servedPocono Manor InnHuman impact likely1.32 mg/LApr 2026300 servedPocono Mobile Home EstatesNatural background0.00 mg/LDec 2025129 servedPocono Mobile Manor MhpHuman impact likely2.33 mg/LAug 202577 servedPocono Mtn Lake Estates Sect5ANatural background0.00 mg/LAug 2025150 servedPocono Plateau Park Well 1Human impact likely2.13 mg/LAug 202560 servedPocono Ranch Lands Sect 4Natural background0.28 mg/LMar 2026225 servedPocono/Jackson Water AuthorityNatural background0.07 mg/LJul 20252,100 servedPoint Marion BoroNatural background0.37 mg/LJan 20261,110 servedPolk CenterNatural background0.00 mg/LDec 20241,058 servedPort Allegany Water DepartmentHuman impact likely1.37 mg/LJul 20252,591 servedPort Clinton Water Coop AssocNatural background0.60 mg/LMar 2026200 servedPort Florence DevelopmentNatural background0.00 mg/LDec 2025100 servedPort Matilda WaterworksNatural background0.00 mg/LMay 2026615 servedPort Royal Muni AuthNatural background0.00 mg/LSep 2025950 servedPortage Boro Muni AuthNatural background0.00 mg/LJun 20266,500 servedPorter Township Municipal AuthNatural background0.00 mg/LJul 2025425 servedPortland Boro AuthorityNatural background0.00 mg/LApr 20261,100 servedPossum Valley Muni AuthHuman impact likely1.73 mg/LMay 2026800 servedPottstown Borough Water AuthHuman impact likely2.31 mg/LMay 202636,000 servedProvidence Place of HazletonHuman impact likely1.95 mg/LOct 2025140 served
Q
Quaker View Mobile Home ParkHealth-study range5.36 mg/LApr 202660 servedQuakertown BoroNatural background0.26 mg/LSep 202512,800 servedQuarryville BoroHealth-study range6.45 mg/LApr 20263,150 servedQuarryville Presby Ret CommNatural background0.00 mg/LFeb 2026750 servedQuincy Twp Water SystemHuman impact clear3.26 mg/LApr 2026530 servedQuincy Village SystemHuman impact likely2.42 mg/LApr 2026450 served
R
R Own Lake IncNatural background0.00 mg/LAug 202530 servedRainbow Valley Mobile HomeNatural background0.00 mg/LAug 2025300 servedRainsburg Borough WaterNatural background0.00 mg/LMay 2026200 servedRalston Area Joint AuthorityNatural background0.00 mg/LJun 2026400 servedRawa North HeidelbergHuman impact clear4.41 mg/LJan 20261,350 servedRayburn Twp Joint Muni Authpurchased waterHuman impact likely1.66 mg/LMay 2026460 servedRaymond Drive Water CompanyNatural background0.00 mg/LSep 2025104 servedRbe Water Association IncNatural background0.70 mg/LFeb 2026175 servedReade Twp Muni AuthNatural background0.10 mg/LJul 20251,746 servedReading Area Water AuthorityNatural background0.00 mg/LJul 202695,100 servedRed Cliff MhpNatural background0.00 mg/LJul 202530 servedRed Hill Water AuthorityHuman impact likely2.75 mg/LFeb 20262,500 servedRed Lion Municipal AuthorityHuman impact clear4.26 mg/LMay 202615,882 servedRed Rock Job Corps CenterNatural background0.00 mg/LApr 2026425 servedRedbank Valley Mun AuthNatural background0.43 mg/LApr 20263,150 servedRedwood Estates Pa Llcpurchased waterNatural background0.62 mg/LAug 2025725 servedRegal Fountain HouseNatural background0.45 mg/LNov 2025125 servedRegency Woods MhpNatural background0.00 mg/LApr 2025450 servedReserve And Ridge At Hilltownpurchased waterHuman impact likely2.96 mg/LApr 2026300 servedReserve Twp Water Deptpurchased waterNatural background0.38 mg/LMay 20263,204 servedRest Assured Assisted LivingNatural background0.85 mg/LMar 202670 servedRestless Oaks Village MhpHuman impact clear3.34 mg/LJun 202652 servedRetreat VillageNatural background0.04 mg/LMay 202680 servedRew Water AssociationNatural background0.00 mg/LDec 2025325 servedReynolds Water CompanyNatural background0.00 mg/LAug 20252,370 servedReynoldsville Water AuthNatural background0.47 mg/LJun 20252,908 servedRichfield Area Joint AuthNatural background0.00 mg/LJun 20261,000 servedRichland Boro Water SupplyNatural background0.92 mg/LApr 20261,700 servedRichland Meadows MhpNatural background0.00 mg/LAug 2025750 servedRichland Twp Water AuthorityNatural background0.00 mg/LAug 20256,800 servedRichland Twp Water Authoritypurchased waterNatural background0.80 mg/LJan 202610,190 servedRichlandtown Water DepartmentHuman impact likely2.17 mg/LAug 20251,450 servedRidge Crest CommunityHuman impact likely1.53 mg/LJun 2026300 servedRidge On The CommonsHuman impact clear4.72 mg/LJul 202630 servedRidge View Personal Care HomeHuman impact likely1.07 mg/LJul 202535 servedRidgebury Mobile ManorNatural background0.39 mg/LDec 202423 servedRidgeview MhpHuman impact likely2.77 mg/LJun 202655 servedRidgeview Mhp & AptsHealth-study range6.30 mg/LJun 202630 servedRidgewood Manor MhpNatural background0.00 mg/LApr 2026314 servedRidgleaNatural background0.00 mg/LJan 2026900 servedRidgway Borough Water SystemNatural background0.00 mg/LAug 20254,700 servedRidgway Twp Water Authpurchased waterNatural background0.00 mg/LAug 20251,763 servedRiegelsville Water AuthorityHuman impact clear4.53 mg/LJul 2026980 servedRimersburg Boro Muni Authpurchased waterHuman impact likely2.41 mg/LMay 20261,873 servedRingtown Boro Water DepartmentHuman impact clear3.99 mg/LNov 2025823 servedRiveredge RentalsHuman impact clear4.64 mg/LMay 202680 servedRiversedgeHealth-study range7.59 mg/LApr 202675 servedRiverview EstatesHealth-study range6.13 mg/LApr 2026375 servedRixford Waterworks AssociationNatural background0.00 mg/LFeb 2026234 servedRoamingwood Sewer And WaterNatural background0.67 mg/LSep 20253,775 servedRoaring Branch WaterworksNatural background0.76 mg/LAug 202590 servedRoaring Spring Muni Water AuthHealth-study range5.28 mg/LApr 20263,182 servedRobinson Twp Muni AuthNatural background0.54 mg/LMay 202616,354 servedRobinsons Mobile Home ParkNatural background0.00 mg/LSep 202530 servedRobinwood VillageHuman impact likely1.69 mg/LFeb 202670 servedRock Spring Water CoNatural background0.00 mg/LJul 20251,000 servedRockwood Boro Muni AuthNatural background0.00 mg/LDec 20251,250 servedRocky Ridge Mobile Home ParkHuman impact likely2.53 mg/LApr 2026171 servedRocky Ridge VillageNatural background0.16 mg/LAug 2025150 servedRolling Hills EstatesHuman impact clear3.23 mg/LMar 2026175 servedRolling Hills ManorNatural background0.00 mg/LFeb 202664 servedRolling Hills MhpHuman impact likely1.99 mg/LJun 2026150 servedRolling Valley EstatesNatural background0.32 mg/LSep 2025180 servedRomar VillageNatural background0.00 mg/LJul 202575 servedRote Mutual Water AssociationNatural background0.00 mg/LJul 2025481 servedRoulette Twp Water AuthorityNatural background0.00 mg/LAug 20251,300 servedRound Top MhpHuman impact likely2.42 mg/LAug 2025185 servedRouseville Mun WaterworksNatural background0.28 mg/LAug 2025523 servedRoute 322 Mobile Home ParkNatural background0.00 mg/LJun 202553 servedRoyal Oaks MhpNatural background0.00 mg/LDec 202585 servedRoyalton Boropurchased waterHuman impact clear4.23 mg/LMay 20261,083 servedRural Solution W3 LlcNatural background0.00 mg/LAug 202538 servedRural Valley Water WorksNatural background0.02 mg/LMay 20261,000 servedRustic Acres MhpHuman impact likely1.18 mg/LFeb 202673 servedRyan Hill DevelopmentNatural background0.00 mg/LDec 202575 served
S
S R WaterNatural background0.56 mg/LApr 2026500 servedSaddleview Water LlcNatural background0.13 mg/LMar 2026233 servedSaegertown BoroughHuman impact likely1.95 mg/LJul 20251,500 servedSaegertown MhpNatural background0.00 mg/LNov 2025200 servedSage Run Distpurchased waterNatural background0.36 mg/LFeb 2026205 servedSaint Francis UniversityNatural background0.00 mg/LSep 20252,072 servedSaint Luke KnollsHuman impact clear3.36 mg/LOct 202550 servedSalemville Water Assnpurchased waterHealth-study range6.39 mg/LJun 2026115 servedSalisbury Boro Water CommNatural background0.00 mg/LDec 2025725 servedSalisbury Twp Water Systempurchased waterHuman impact clear4.18 mg/LMay 20268,522 servedSaltillo Muni Water WorksNatural background0.00 mg/LSep 2025350 servedSandy Hill EstatesNatural background0.00 mg/LApr 2025325 servedSandy Lake BoroHuman impact clear4.01 mg/LJan 20261,100 servedSandy Run AssocNatural background0.00 mg/LMar 202647 servedSandy Townshippurchased waterNatural background0.00 mg/LAug 20251,828 servedSandycreek Twp Waterworkspurchased waterHuman impact likely1.20 mg/LJan 20262,417 servedSankertown Boro Water Syspurchased waterNatural background0.33 mg/LAug 2025760 servedSaxton Muni Water AuthHuman impact likely1.29 mg/LJun 20261,675 servedSbwja Grove ParkHuman impact likely1.54 mg/LApr 2026185 servedSbwja Hampton Hills OpequonHuman impact likely2.19 mg/LJul 2025684 servedScenic Mobile Home ParkNatural background0.00 mg/LJan 202550 servedScenic ViewHuman impact likely2.96 mg/LJan 202645 servedScenic View ApartmentsHuman impact clear3.92 mg/LSep 2025150 servedSchoolhouse AptsHuman impact likely1.16 mg/LApr 202638 servedSchoolhouse Hill AptsNatural background0.19 mg/LJan 202638 servedSchuylkill Co Mun AuthNatural background0.00 mg/LJul 202531,850 servedSchuylkill Haven Boro WaterNatural background0.00 mg/LMar 20266,000 servedSchwenksville Borough AuthHuman impact likely1.23 mg/LFeb 20265,200 servedSci DallasNatural background0.00 mg/LNov 20252,900 servedSciota GardensNatural background0.00 mg/LSep 202550 servedScma Orwigsburg Consecutivepurchased waterNatural background0.00 mg/LJul 2025500 servedScma Pine Grove TownshipNatural background0.00 mg/LJul 2025260 servedScma PinebrookHuman impact clear3.14 mg/LJul 2025735 servedScma-TremontNatural background0.00 mg/LJul 20252,515 servedScottys Manufactured HomesHuman impact clear3.61 mg/LFeb 202667 servedSelinsgrove CenterHealth-study range8.03 mg/LJun 20261,000 servedSelinsgrove Muni AuthHuman impact clear3.93 mg/LJun 20265,584 servedSeneca & Cranberry Mall DistNatural background0.00 mg/LJun 20264,500 servedSeven Fields Boro Water Deptpurchased waterNatural background0.80 mg/LJan 20263,100 servedSeven Hills MhpNatural background0.00 mg/LJun 202565 servedSeven Springs Muni AuthHuman impact likely1.56 mg/LNov 20253,000 servedSewickley Boro Water AuthHuman impact likely2.40 mg/LJun 20266,800 servedShady Back Acres MhpHuman impact clear3.74 mg/LApr 202640 servedShady Grove Mobile Home ParkHuman impact clear4.80 mg/LJul 2026129 servedShady Lane Home ParkNatural background0.57 mg/LJan 202640 servedShalako Run MhpHealth-study range5.03 mg/LJun 2026125 servedShamokin Dam BoroughNatural background0.00 mg/LApr 20261,700 servedShangri La MhpHuman impact likely1.01 mg/LJan 202686 servedSharpsville Boro Water Copurchased waterNatural background0.00 mg/LApr 20265,029 servedSheffield Twp Municipal AuthNatural background0.62 mg/LJan 20261,075 servedShermans Valley Apts Perlo IiiHuman impact likely2.38 mg/LJun 202645 servedShillington Muni Authpurchased waterHealth-study range5.35 mg/LMay 202613,300 servedShinglehouse Boro Water DeptHuman impact likely2.02 mg/LSep 20251,250 servedShippensburg Boro Water AuthHuman impact likely2.43 mg/LMay 202617,800 servedShippingport Boro Water Syspurchased waterNatural background0.75 mg/LJun 2025222 servedShirleysburg Muni AuthNatural background0.00 mg/LMay 2026225 servedShoemakersville Boro Water SysHuman impact clear4.53 mg/LApr 20262,150 servedShort Mountain Village MhpHuman impact likely2.04 mg/LApr 202653 servedShrewsbury BoroughHealth-study range7.61 mg/LApr 20264,727 servedSicklers MhpNatural background0.76 mg/LApr 202630 servedSilver Spring Country EstatesNatural background0.00 mg/LApr 2026110 servedSilver Spring Water AssnNatural background0.00 mg/LJul 2025130 servedSittlers MhpNatural background0.00 mg/LApr 202689 servedSk Properties Lp Misty MeadowsHuman impact clear3.69 mg/LFeb 202660 servedSky View TerraceNatural background0.31 mg/LSep 202550 servedSkytop Lodge IncNatural background0.81 mg/LApr 2026300 servedSkyview Gardens AptsNatural background0.96 mg/LJan 2026234 servedSkyview Gardens Heights AptsNatural background0.94 mg/LJan 2026186 servedSlatington Borough Water SysNatural background0.00 mg/LMay 20264,450 servedSlippery Rock Muni AuthNatural background0.00 mg/LFeb 202615,778 servedSmethport BoroughHuman impact likely1.24 mg/LJul 20252,400 servedSmithfield CourtHuman impact likely1.25 mg/LMar 202650 servedSmithville MhpHealth-study range6.00 mg/LApr 2026166 servedSnake Spring Township MaHuman impact clear3.40 mg/LJun 2026750 servedSoldier Water Systempurchased waterNatural background0.00 mg/LAug 2025250 servedSolebury SchoolHuman impact likely2.86 mg/LMay 2026300 servedSomers Lane MhpNatural background0.00 mg/LApr 2026130 servedSomerset Boro Muni Water AuthNatural background0.60 mg/LAug 20256,309 servedSomerset Cnty Quemahoning SystHuman impact likely1.27 mg/LSep 202525 servedSomerset Estates MhpNatural background0.00 mg/LJun 2026300 servedSomerset Twp M A Friedenspurchased waterHuman impact likely1.27 mg/LSep 20251,374 servedSomerset Twp Ma Reading MinesNatural background0.00 mg/LJun 2026494 servedSomerset Twp Mun Auth ListieNatural background0.00 mg/LJun 2026218 servedSomerset Twp Muni Auth Oakridgpurchased waterNatural background0.60 mg/LAug 20253,800 servedSouth Buffalo Twp Muni Authpurchased waterNatural background0.35 mg/LAug 20251,230 servedSouth Middleton Twp Water AuthHuman impact clear3.36 mg/LApr 202611,695 servedSouth Mountain Restoration CtrNatural background0.00 mg/LApr 2025950 servedSouth Park Mhc Llcpurchased waterNatural background0.62 mg/LAug 2025740 servedSouth Pymatuningpurchased waterNatural background0.00 mg/LApr 2026641 servedSouthampton Manor MhpHuman impact likely1.29 mg/LNov 2025160 servedSouthern Cumberland Water AssnHuman impact clear4.78 mg/LApr 2026400 servedSouthland Hills Mobile HomesHuman impact likely2.51 mg/LApr 202696 servedSouthpoint Homeowners AssocNatural background0.00 mg/LJun 202640 servedSouthside Northside Water AssnNatural background0.52 mg/LJul 202572 servedSouthwest Warren Co Mun AuthNatural background0.35 mg/LJan 20261,040 servedSouthwestern Cambria Cnty Authpurchased waterNatural background0.30 mg/LJul 20254,400 servedSouthwestern Pa Water AuthNatural background0.46 mg/LAug 202540,200 servedSpring Lake ParkNatural background0.96 mg/LMar 202635 servedSpring Run Estates WtpHuman impact clear4.72 mg/LApr 2026450 servedSpring Twp Municipal AuthorityHuman impact clear3.12 mg/LMar 2025805 servedSpring Twp Water AuthorityHuman impact likely2.67 mg/LJul 20263,300 servedSpring ValleyNatural background0.14 mg/LAug 2025250 servedSpringboro Area Water AuthNatural background0.00 mg/LSep 20251,175 servedTownship of Springdalepurchased waterNatural background0.91 mg/LJun 20261,600 servedSpringdale Boro Water DeptNatural background0.91 mg/LJun 20263,405 servedSpringdale GardensNatural background0.00 mg/LJan 202641 servedSpringfield VillageHuman impact likely1.00 mg/LMar 202580 servedSpringhill Mobile Home ParkNatural background0.00 mg/LAug 2025130 servedSpringtown Water AuthorityHuman impact clear3.11 mg/LApr 2026600 servedSproul Water AssnHuman impact likely2.72 mg/LApr 2026180 servedSpruce Court ApartmentsHuman impact clear4.54 mg/LMay 2026139 servedSt Clairsville Water CompanyNatural background0.00 mg/LMay 2025392 servedSt Correct Inst HuntingdonNatural background0.00 mg/LApr 20262,200 servedSt Mary of Providence CenterHealth-study range6.41 mg/LMay 202675 servedSt Marys Area Water AuthNatural background0.22 mg/LJul 202519,588 servedSt Marys Villa Nursing HomeNatural background0.44 mg/LFeb 2026353 servedSt Paul HomesNatural background0.00 mg/LMay 20261,000 servedSt Petersburg Municipal WaterNatural background0.24 mg/LMay 2025465 servedStanton Hills CommunityNatural background0.41 mg/LSep 2025100 servedState College Boro Water AuthHuman impact clear4.51 mg/LApr 202672,000 servedState Corr Inst Benner TwpHuman impact clear3.01 mg/LJun 20262,850 servedState Correctional InstHuman impact clear3.80 mg/LApr 20263,500 servedState Line MhpHealth-study range5.82 mg/LJun 202665 servedStewartstown Boro Water AuthHealth-study range5.33 mg/LApr 20265,206 servedStone Barn RentalsHuman impact clear4.09 mg/LJun 2026120 servedStoneboro Water WorksHealth-study range5.20 mg/LJun 2026956 servedStonebridge Gardens MhpNatural background0.31 mg/LJun 202575 servedStonebridge Health & Rehab CtrNatural background0.00 mg/LAug 202560 servedStoneworth Apts WtpNatural background0.00 mg/LJul 2025150 servedStoney Run AptNatural background0.00 mg/LNov 202540 servedStoneyhill MhpHuman impact clear4.12 mg/LJan 2026124 servedStony Brook Circle MhpNatural background0.00 mg/LMay 2026272 servedStrasburg Muni Water AuthHealth-study range7.33 mg/LMay 20263,100 servedSuburban Lock Haven Water Authpurchased waterNatural background0.00 mg/LApr 20269,700 servedSuez Water Kensington Systempurchased waterHuman impact likely1.23 mg/LNov 2025204 servedSugar Creek Care CenterHuman impact likely1.11 mg/LJun 2026356 servedSugar Creek ResthomeNatural background0.00 mg/LFeb 2026323 servedSugarcreek Boroughpurchased waterHuman impact likely1.20 mg/LJan 20261,000 servedSugarcreek MhpHuman impact likely2.79 mg/LJul 202556 servedSugarcreek Water CoHuman impact likely1.70 mg/LMay 2026205 servedSullivan Trail VillageHuman impact likely1.24 mg/LDec 202545 servedSummerville Boro Mun AuthNatural background0.00 mg/LAug 2025700 servedSummit EstatesNatural background0.00 mg/LJul 202572 servedSummit Hill Water AuthorityNatural background0.10 mg/LJun 20252,890 servedSummit Township Water AuthoritNatural background0.00 mg/LOct 202512,500 servedSun Dial Village MhpNatural background0.00 mg/LSep 202590 servedSunny Acres Mobilehome ParkHuman impact clear3.56 mg/LSep 202560 servedSunny Crest HomeHuman impact clear4.61 mg/LMay 202671 servedSunny Spot ApartmentsNatural background0.00 mg/LJan 202627 servedSunnydale SubdivisionNatural background0.00 mg/LJul 202560 servedSunnyview Mobile Home ParkNatural background0.00 mg/LNov 202588 servedSunrise Lake Section 9Natural background0.97 mg/LNov 2025125 servedSunrise Lakes Sec 12Human impact likely1.21 mg/LNov 2025125 servedSunrise Terrace Mobile Home PkHuman impact likely1.12 mg/LAug 2025144 servedSunrise Trailer CtHuman impact likely2.02 mg/LMar 2026200 servedSunset Mobile Home ParkNatural background0.48 mg/LDec 2025150 servedSunset Ridge Rehab CtrHuman impact clear4.58 mg/LJun 202660 servedSunshine Hills Water CoNatural background0.00 mg/LMay 2025248 servedSutton MhpNatural background0.00 mg/LJul 202596 servedSweet Valley MhcNatural background0.77 mg/LMar 202660 servedSwt Allentown Cons Systempurchased waterHuman impact likely2.97 mg/LApr 20261,300 servedSwt Main SystemHuman impact clear4.18 mg/LMay 202614,500 servedSykesville Boroughpurchased waterNatural background0.00 mg/LAug 20251,500 served
T
T & J Valley View MhpNatural background0.00 mg/LNov 2025130 servedT&T MhpNatural background0.00 mg/LAug 202540 servedTall Timbers Village M H PNatural background0.64 mg/LMar 2025275 servedTamaqua Area Water AuthorityNatural background0.11 mg/LJul 20258,000 servedTamarack & Spread Eagle MhpHuman impact likely2.54 mg/LJan 2026300 servedTamiment ResortNatural background0.00 mg/LOct 20251,200 servedTarentum Boro Water DeptNatural background0.92 mg/LFeb 20254,927 servedTaylors Mobile Home ParkHuman impact likely2.33 mg/LFeb 202650 servedTeakettle Run Water AuthNatural background0.00 mg/LApr 202692 servedTeen Challenge Trng CtrNatural background0.61 mg/LMar 2026300 servedTel Hai Retirement CommunityHuman impact clear4.44 mg/LMay 2026930 servedTelford Borough AuthorityHuman impact clear3.07 mg/LJun 20267,700 servedTempleton Water CoHuman impact clear4.12 mg/LMar 2025451 servedTerrace Hill MhpNatural background0.79 mg/LJan 202690 servedTerre Hill BoroughHealth-study range8.88 mg/LJun 20261,295 servedTerryhill Estates MhpHuman impact clear4.69 mg/LApr 202690 servedThe Acorns LlcHuman impact likely2.99 mg/LApr 202650 servedThe EscapeHuman impact likely1.07 mg/LJun 20261,100 servedThe Gardens At OrangevilleHuman impact likely1.95 mg/LJan 2026118 servedThe Orchard At Airport RoadNatural background0.00 mg/LDec 202537 servedThe Pines At West PennNatural background0.00 mg/LMay 2026466 servedThe Valley MhcNatural background0.21 mg/LJan 202537 servedThompsontown Muni AuthNatural background0.00 mg/LAug 20251,000 servedThree Springs Boro Water CoNatural background0.00 mg/LSep 2025442 servedTiadaghton View MhpHuman impact likely2.93 mg/LMay 2026175 servedTiffany PinesNatural background0.00 mg/LFeb 2026150 servedTimber Rise LlcNatural background0.00 mg/LJul 202560 servedTimber Service CorpHuman impact likely2.10 mg/LAug 202550 servedTimber VillaHuman impact likely2.46 mg/LJun 2026140 servedTimbercrest ApartmentsNatural background0.00 mg/LApr 2025125 servedTioga Boro Municipal AuthorityHuman impact likely2.86 mg/LApr 2026615 servedTioga Mobile Home CommunityNatural background0.00 mg/LJan 2026200 servedTionesta Borough Water SupplyNatural background0.12 mg/LApr 2026610 servedTitusville EstatesNatural background0.00 mg/LSep 202544 servedTitusville Municipal WaterNatural background0.61 mg/LJul 20256,146 servedToby Waterpurchased waterNatural background0.22 mg/LJul 2025440 servedTobyhanna Army DepotNatural background0.00 mg/LJan 20263,800 servedTopton Boro Water SupplyHuman impact likely2.42 mg/LJan 20262,069 servedTorrance State HospitalNatural background0.23 mg/LAug 2025997 servedTowanda Municipal AuthorityHuman impact likely1.79 mg/LAug 20255,000 servedTower City Borough AuthorityNatural background0.00 mg/LMay 20263,150 servedTown & Country Water AssocHuman impact likely2.57 mg/LFeb 202679 servedTown And Country EstatesNatural background0.00 mg/LJan 2026200 servedTown Homes At Maple LaneNatural background0.00 mg/LMar 202660 servedTranquility FallsHuman impact likely1.13 mg/LFeb 2026121 servedTransitions Health CareHuman impact clear3.01 mg/LOct 2025150 servedTri Cnty Jt Muni AuthNatural background0.67 mg/LFeb 202510,100 servedTri Valley Eldo Lake DivisionNatural background0.00 mg/LJan 2026310 servedTriple J MhpHuman impact clear4.66 mg/LMay 2026200 servedTrotter FarmsHealth-study range6.01 mg/LApr 2026175 servedTroy Water DeptartmentHuman impact likely1.35 mg/LFeb 20261,362 servedTrumbauersville Mun WaterworksHuman impact likely1.16 mg/LOct 2025974 servedTunkhannock Boro Munic AuthHuman impact likely2.84 mg/LAug 20255,349 servedTuscarora VillageHuman impact likely2.68 mg/LApr 2026225 servedTwin Falls MhpNatural background0.00 mg/LFeb 202634 servedTwin Lakes Utilities IncNatural background0.00 mg/LJun 2026300 servedTwin Maples MhpNatural background0.00 mg/LApr 2026280 servedTwin Pines Health Care CenterHealth-study range6.57 mg/LApr 2026120 servedTwp of Upper MakefieldHuman impact likely2.99 mg/LJul 20261,800 servedTylersville Mutual Water AssnNatural background0.00 mg/LJun 2026273 servedTyrone Boro Water AuthNatural background0.00 mg/LJul 20256,500 served
U
Ulster Municipal AuthorityHuman impact likely1.90 mg/LJun 2026500 servedUlysses Municipal AuthorityHuman impact clear4.20 mg/LMay 2026640 servedUmh Arbor EstatesNatural background0.65 mg/LApr 2025920 servedUmh Valley StreamNatural background0.00 mg/LNov 2025384 servedUnion City Municipal AuthorityNatural background0.32 mg/LApr 20264,295 servedUnion Twp Municipal Authoritypurchased waterNatural background0.00 mg/LAug 2025450 servedUnionville Municipal WaterwksNatural background0.00 mg/LMay 2026290 servedUpper Halfmoon WaterHuman impact likely1.97 mg/LApr 20261,500 servedUpper Hanover Water AuthorityHuman impact likely2.67 mg/LApr 20264,600 servedUpper Leacock TownshipHealth-study range6.29 mg/LJun 20267,734 servedUpper Makefield EnclaveNatural background0.00 mg/LApr 202625 servedUpper Saucon Twp Water SupplyHuman impact likely2.66 mg/LMay 20267,300 servedUpper Southampton Mun AuthHuman impact likely1.80 mg/LApr 202616,000 servedUrban Acres MhpHuman impact likely2.06 mg/LApr 202680 servedUs Army GarrisonHuman impact clear3.60 mg/LAug 20251,700 served
V
Va Healthcare System Heinzpurchased waterNatural background0.38 mg/LMay 20263,112 servedVail Water AssnNatural background0.00 mg/LDec 202598 servedVali-View Mobile Home ParkNatural background0.00 mg/LFeb 2026150 servedValley Gorge Mh Park LlcNatural background0.00 mg/LApr 202660 servedValley Run Water SystemHuman impact clear4.25 mg/LMay 2026626 servedValley View EstatesNatural background0.00 mg/LJan 202668 servedValley View MhpNatural background0.00 mg/LOct 2025480 servedValley View Mhp BlandonHuman impact clear3.47 mg/LApr 202650 servedValley View Mhp MorgantownHuman impact likely1.41 mg/LApr 202660 servedValley View Mhp WernersvilleHuman impact clear4.86 mg/LApr 202660 servedValley View Village MhpNatural background0.00 mg/LAug 202555 servedVanport Twp Muni AuthHuman impact likely1.82 mg/LAug 20252,000 servedVenango Water CoNatural background0.00 mg/LApr 2026550 servedVeolia MechanicsburgHuman impact clear3.40 mg/LApr 202645,013 servedVeolia MiddletownHuman impact clear4.23 mg/LMay 20269,600 servedVeolia Newberry SystemHealth-study range5.50 mg/LApr 20266,480 servedVeolia WaterHealth-study range5.10 mg/LMay 2026110,000 servedVeolia Water Bethelpurchased waterHuman impact likely1.77 mg/LJun 20267,809 servedVeolia Water Pa Brown ManorHuman impact likely1.45 mg/LAug 202591 servedVeolia Water Pa DallasHuman impact likely1.28 mg/LAug 20257,563 servedVeolia Water Pa Harveys LakeNatural background0.79 mg/LAug 2025200 servedVeolia Water Pa Inc BloomsburgNatural background0.77 mg/LAug 202529,382 servedVeolia Water Pa Inc CcipHuman impact likely2.28 mg/LAug 2025419 servedVeolia Water Pa NoxenNatural background0.00 mg/LAug 2025315 servedVeolia Water Pa ShavertownHuman impact likely1.50 mg/LAug 20253,472 servedVernon Twp Water Authoritypurchased waterNatural background0.13 mg/LMay 20261,500 servedVictoria Estates MhpNatural background0.52 mg/LJul 202578 servedVictoria Manor EstHealth-study range6.78 mg/LMay 2026120 servedVictoria Village TownhouseNatural background0.00 mg/LFeb 202699 servedVillage 2 Community AssocHuman impact likely1.92 mg/LJan 2026650 servedVillage At CamelbackHuman impact likely2.30 mg/LJun 2026309 servedVillage At Safe HarborHuman impact clear3.02 mg/LApr 2026120 servedVillage At Summit CrestNatural background0.00 mg/LJan 2026120 servedVillage At Whispering PinesNatural background0.00 mg/LJan 202693 servedVillage Square CondiminiumsNatural background0.05 mg/LJun 202648 servedVillas At GeorgetownHuman impact likely1.39 mg/LApr 202630 servedVirginia Hills Pa Llcpurchased waterNatural background0.62 mg/LAug 2025843 servedVolant Borough Water DeptNatural background0.00 mg/LJul 2025120 served
W
W Carroll Twp W Auth St BenedNatural background0.00 mg/LApr 2026488 servedW Freedom Water AssnNatural background0.00 mg/LAug 2025250 servedW Stclair Pleasantville MuniHuman impact likely2.79 mg/LJan 2026715 servedWadels MhpHuman impact likely2.32 mg/LApr 202597 servedWalker Twp Muni AuthHuman impact likely1.36 mg/LJun 20261,450 servedWalker Twp Water AssocHuman impact clear4.98 mg/LMay 20263,250 servedWallenpaupack Lake EstatesNatural background0.33 mg/LSep 20252,200 servedWalmar Manor MhpHealth-study range5.60 mg/LDec 2025400 servedWalnut Grove MhcNatural background0.00 mg/LApr 2026425 servedWalnutport AuthorityHuman impact likely1.22 mg/LMay 20263,000 servedWalnutport Mobile CourtHealth-study range5.49 mg/LMay 2026150 servedBorough of Wampum Water DeptNatural background0.44 mg/LJul 2025832 servedWarminster Municipal AuthorityHuman impact likely1.82 mg/LMay 202636,000 servedWarren State HospitalHuman impact likely1.80 mg/LJun 2025721 servedWarriors Mark Gen AuthHealth-study range5.42 mg/LMay 2026750 servedWarwick Mobile Home ParkHuman impact clear4.90 mg/LApr 202640 servedWarwick Twp Lititz Syspurchased waterHealth-study range5.88 mg/LJul 20268,561 servedWarwick Twp Rothsville SystemHuman impact clear4.47 mg/LMay 20262,846 servedWarwick Twp Water & Sewer Authpurchased waterHuman impact clear4.00 mg/LJun 202614,699 servedWarwick Water WorksNatural background0.00 mg/LJul 202598 servedWashington Estates Ii Mhc Llcpurchased waterNatural background0.62 mg/LAug 2025373 servedWashington Estates Mhc Llcpurchased waterNatural background0.62 mg/LAug 2025358 servedWashington Twp Muni AuthHuman impact likely2.03 mg/LAug 20256,134 servedWashington Twp Water SystemNatural background0.00 mg/LSep 2025797 servedWaterford Municipal AuthorityNatural background0.00 mg/LApr 20261,700 servedWaterford WaterworksNatural background0.00 mg/LDec 2025389 servedWaterside Loysburg Water SupplNatural background0.00 mg/LApr 20261,724 servedWaterville Water AssocHuman impact likely2.15 mg/LJun 202698 servedWatrous Water AssociationNatural background0.00 mg/LJun 202575 servedWattsburg Boro WtpNatural background0.00 mg/LNov 2025450 servedWayne Twp Muni Water Authpurchased waterHuman impact likely1.12 mg/LApr 2026167 servedWbwa Mohrsville DistrictHuman impact clear4.95 mg/LApr 2026375 servedWeatherly Boro Mun AuthHuman impact likely2.28 mg/LSep 20252,612 servedWeaverland Valley Blue BallHealth-study range7.23 mg/LJun 20261,946 servedWec InternationalHuman impact likely1.68 mg/LJul 202525 servedWeidas Mobile Home ParkNatural background0.00 mg/LDec 202577 servedWellington Mobile EstatesHealth-study range5.15 mg/LApr 202690 servedWells Tannery Water SysHuman impact likely1.25 mg/LJun 202595 servedWellsboro Municipal AuthorityNatural background0.00 mg/LOct 20258,225 servedWelsh Mountain HomeHuman impact likely2.83 mg/LJan 202653 servedWernersville Muni Water AuthHealth-study range5.75 mg/LJul 20267,654 servedWest Buffalo Twp Mun AuthHealth-study range5.00 mg/LApr 2024333 servedWest Carroll W Auth BakertonHuman impact likely1.20 mg/LMay 2026670 servedWest Cnty Muni Auth-MckeesportNatural background0.64 mg/LJul 202532,644 servedWest Cocalico Twp Water AuthHealth-study range9.61 mg/LApr 20262,430 servedWest Cornwall Township MaHuman impact clear3.10 mg/LJun 2026900 servedWest Earl Water AuthorityHealth-study range5.20 mg/LApr 20264,327 servedWest Grove BoroughHealth-study range6.98 mg/LApr 20262,873 servedWest Hickory Water CompanyHuman impact likely1.50 mg/LMay 2026450 servedWest Kittanning Muni Authpurchased waterNatural background0.67 mg/LFeb 20262,000 servedWest Lebanon Twp Water SupplyHuman impact clear3.57 mg/LApr 2026780 servedWest Manchester Twp AuthHuman impact clear3.02 mg/LMay 20269,960 servedWest Reading Boro Waterpurchased waterHealth-study range5.35 mg/LMay 20264,300 servedWest Sheffield Water AssnNatural background0.00 mg/LJan 2026225 servedWest Springfield Mobile Hm PkHealth-study range8.58 mg/LApr 202690 servedWest View Water AuthorityNatural background0.80 mg/LJan 2026200,000 servedWestern Allegheny County Mun Apurchased waterNatural background0.62 mg/LAug 202519,031 servedWestern Berks Water AuthHealth-study range5.35 mg/LMay 202675 servedWestern Clinton Co Mun AuthNatural background0.00 mg/LOct 20252,610 servedWestern Cumberland Water SysNatural background0.00 mg/LMay 2026275 servedWestern HeightsNatural background0.68 mg/LApr 2026312 servedWestfield Borough WaterworksHuman impact likely2.41 mg/LJul 20251,300 servedWestgate Water SystemNatural background0.69 mg/LMar 2026150 servedWestover Municipal AuthorityNatural background0.00 mg/LSep 2025456 servedWesttown SchoolHealth-study range6.66 mg/LApr 2026900 servedWestwood Park Water CoNatural background0.00 mg/LOct 202595 servedWetherill EstatesHealth-study range6.50 mg/LJul 2026250 servedWheatfield VillageNatural background0.94 mg/LOct 202435 servedWherley ParkHealth-study range9.90 mg/LApr 202634 servedWhipperwill MhpNatural background0.00 mg/LFeb 202625 servedWhispering Hollow-South MhpHealth-study range5.65 mg/LJun 2026400 servedWhispering Pines MhpNatural background0.39 mg/LDec 202555 servedWhispering Pines MhpHuman impact clear4.49 mg/LMay 202597 servedWhispering WoodsNatural background0.00 mg/LDec 2025100 servedWhite Haven CenterHuman impact likely1.06 mg/LAug 2025375 servedWhite Rock Mobile Home ParkNatural background0.25 mg/LMay 202650 servedWhite Sand SpringsNatural background0.00 mg/LOct 202540 servedWhitehall Twp AuthorityHuman impact clear3.81 mg/LAug 202513,063 servedWhites Ferry Road AptsNatural background0.54 mg/LAug 202539 servedWhites Mobile Home ParkNatural background0.93 mg/LDec 202590 servedWhitetail Ski ResortNatural background0.00 mg/LJan 2026912 servedWilbur Community WaterHuman impact likely1.65 mg/LDec 202597 servedWilderness MhpNatural background0.00 mg/LApr 2025200 servedWilkinsburg-Penn Jt Water AuthNatural background0.33 mg/LAug 2025125,000 servedWill O Hill AptsHuman impact clear4.29 mg/LJul 2025300 servedWilliams Grove MhpHuman impact likely2.15 mg/LMar 2026282 servedWilliamsburg Munic AuthHuman impact likely1.49 mg/LApr 20261,800 servedWilliamsport Mun Water AuthNatural background0.43 mg/LAug 202551,000 servedWilliamstown Boro AuthNatural background0.00 mg/LMar 20262,390 servedWillow Haven North MhpHuman impact clear3.19 mg/LFeb 2026240 servedWindber Area AuthNatural background0.31 mg/LAug 20259,463 servedWindhaven MhpHuman impact likely2.57 mg/LApr 2026112 servedWindsor Boro Water Authpurchased waterHuman impact clear4.26 mg/LMay 20261,332 servedWindsor Castle MhpNatural background0.00 mg/LFeb 202690 servedWindsor Mobilehome ParkNatural background0.16 mg/LJul 202570 servedWinola View AptsNatural background0.56 mg/LAug 202528 servedWomelsdorf Robesonia Jt AuthHuman impact clear3.12 mg/LApr 20267,070 servedWonderview Water CoNatural background0.00 mg/LMay 2026350 servedWood Broad Top Wells Jmun AuthNatural background0.00 mg/LFeb 2026800 servedWoodbine Oaks MhpHuman impact clear3.50 mg/LNov 202565 servedWoodbrooke Water AuthorityNatural background0.00 mg/LJan 202687 servedWoodbury Water AuthorityNatural background0.00 mg/LAug 2025295 servedWooded Ridge DevelopmentHuman impact likely1.86 mg/LAug 202590 servedWoodhaven Mobile Home ParkNatural background0.38 mg/LDec 2024350 servedWoodland Est Mobile HomesHuman impact clear3.85 mg/LApr 202672 servedWoodland Heights ApartmentsNatural background0.00 mg/LSep 2025100 servedWoodland Heights Distpurchased waterNatural background0.36 mg/LFeb 2026480 servedWoodland HillsHuman impact likely1.25 mg/LDec 2025320 servedWoodland MhpHuman impact likely2.90 mg/LJun 202661 servedWoodlands Mobile Home ParkNatural background0.00 mg/LSep 2025175 servedWoodlyn ResidencesNatural background0.00 mg/LDec 202535 servedWoodmere EstatesNatural background0.13 mg/LJul 202561 servedWoodside Mobile Home ParkHuman impact clear3.48 mg/LFeb 2026130 servedWoodside Terrace MhpNatural background0.53 mg/LDec 202584 servedWorthington West Franklin JmaHuman impact likely2.01 mg/LJul 20251,500 servedWrightsville Boro Muni AuthHuman impact likely1.03 mg/LJun 20264,076 servedWyalusing Municipal AuthorityNatural background0.42 mg/LMay 2026700 servedWynwood House At Salem HillNatural background0.00 mg/LApr 202632 servedWyomissing Boro Water Systempurchased waterHealth-study range5.35 mg/LMay 20268,500 servedWysox Twp Municipal Authoritypurchased waterHuman impact likely1.79 mg/LAug 20251,763 served
Y
Yerkes Water AssociationHuman impact likely2.95 mg/LOct 2025165 servedYork Springs Muni WaterHuman impact clear3.45 mg/LMar 20261,095 servedYork Water CoHuman impact clear3.63 mg/LMay 2026206,762 servedYoungs Mobile Home ParkNatural background0.00 mg/LAug 202563 servedYoungstown Boro Muni AuthNatural background0.00 mg/LDec 20232,730 servedYoungsville Mun WaterworksHuman impact likely1.34 mg/LJul 20251,957 servedYouth Forestry Camp No 3Natural background0.00 mg/LApr 202643 served
Z
Zeigler MhpHealth-study range8.10 mg/LJun 202646 servedZelienople Boropurchased waterHuman impact likely1.12 mg/LNov 20254,123 servedZerbe SistersHealth-study range6.23 mg/LApr 2026210 servedZullinger Water System Wtmapurchased waterNatural background0.41 mg/LApr 20261,080 served

← Back to the Pennsylvania overview

NitrateSmart

Nitrate in community water systems, from the utilities’ own compliance reporting.

Results reaching back to July 2023 · current through August 9, 2026.

Data & methods

How this is built
Coverage and gaps

About

About
Privacy
Health data privacy
Contact

Educational information, not medical or personal safety advice.