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Massachusetts system directory

Find a community water system

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

465

systems with a current result

9,028,348

people served by them

1

system carrying a supplier result

10

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.

Showing 465 of 465 systems

0-9

122 Main StreetHuman impact likely2.48 mg/LJan 202630 served

A

Abington/Rockland Joint Wtr. WorksNatural background0.12 mg/LOct 202533,647 served Acton Water Supply DistrictHuman impact likely1.55 mg/LMay 202620,780 served Acushnet Manufactured HomesHuman impact likely2.59 mg/LApr 202685 served Adams Fire DistrictNatural background0.63 mg/LApr 20267,851 served Agawam Springs Water CompanyNatural background0.29 mg/LDec 20252,380 served Amesbury Dpw Water Div.Natural background0.03 mg/LMay 202617,366 served Amherst Dpw Water DivisionNatural background0.44 mg/LMay 202639,263 served Andover Water DeptNatural background0.41 mg/LJan 202636,569 served Andrews Farm Water Co.,Inc.Human impact clear4.75 mg/LJun 2026150 served Applewood Community CorporationHuman impact likely1.16 mg/LJul 2025500 served Applewood Home For EldersNatural background0.01 mg/LDec 202550 served Aquarion Water Co. (Springdale Farms)Human impact clear4.54 mg/LApr 2026126 served Aquarion Water CompanyNatural background0.03 mg/LOct 2025987 served Aquarion Water Company (Dover)Health-study range5.14 mg/LApr 20261,922 served Aquarion Water Company OxfordHuman impact clear3.47 mg/LJun 20267,343 served Aquarion Water Company Ponds of PlymouthHuman impact likely1.43 mg/LMay 20262,267 served Aquarion Water Company, MillburyHuman impact likely2.37 mg/LJun 202611,326 served Aquarion Water Company, PinehillsNatural background0.57 mg/LFeb 20269,195 served Arbor Glen CondominiumsNatural background0.13 mg/LMar 2026132 served Ash/Win Joint Water AuthorityNatural background0.05 mg/LApr 202611,394 served Ashfield Water DistrictNatural background0.15 mg/LMay 2026400 served Ashland Water And Sewer Dept.Natural background0.15 mg/LJul 202518,832 served Ashmere Water ServiceNatural background0.56 mg/LJul 202566 served Athol Dpw Water DivisionHuman impact likely1.36 mg/LApr 202610,587 served Attleboro Water DeptNatural background0.24 mg/LJan 202646,654 served Auburn Water DistrictHuman impact likely1.44 mg/LMay 202612,255 served Town of AvonHuman impact likely2.26 mg/LJun 20264,777 served Ayer Dpw Water DivisionNatural background0.40 mg/LMay 20268,479 served Ayer Road Properties LlcNatural background0.66 mg/LApr 2026150 served

B

Bachelor KnollsHuman impact likely2.95 mg/LSep 2025101 served Bard College At Simons RockHuman impact likely2.16 mg/LJul 2025500 served Barnstable Fire DistrictHuman impact likely2.50 mg/LJun 20255,400 served Barre Mhp/Waterwheel VillageHuman impact likely1.91 mg/LApr 2026114 served Barre Water DepartmentNatural background0.71 mg/LApr 20264,098 served Bartows Mobile Home ParkNatural background0.18 mg/LFeb 202625 served Beaver Pond MeadowsNatural background0.23 mg/LJul 2025160 served Beechwood Point CondosHealth-study range5.80 mg/LApr 2026112 served Belchertown Water DistrictHuman impact likely1.68 mg/LApr 20263,253 served Bellingham Dpw Water Sewer DivisionNatural background0.99 mg/LApr 202616,061 served Benchmark CondominiumsNatural background0.71 mg/LApr 202660 served Benfield FarmsNatural background0.03 mg/LJul 202550 served Berkshire EstatesNatural background0.43 mg/LApr 2026180 served Berkshire Rehab Skilled Care CtrHuman impact likely1.97 mg/LOct 2025100 served Berkshire SchoolNatural background0.06 mg/LOct 2025425 served Bernardston Fire Water DistNatural background0.65 mg/LApr 20261,462 served Billerica Water WorksNatural background0.26 mg/LAug 202542,119 served Bishops Landing CondominiumsNatural background0.03 mg/LApr 202650 served Bisselville EstateNatural background0.21 mg/LJul 202574 served Blackstone Water DepartmentHuman impact likely1.13 mg/LJul 20259,868 served Blandford Water DeptNatural background0.03 mg/LJun 2026442 served Bolton Country ManorNatural background0.03 mg/LApr 202660 served Bolton Office Park Alta Nashoba ValleyNatural background0.05 mg/LApr 2026788 served Bondsville Fire And Water DistrictHuman impact likely1.15 mg/LDec 20251,429 served Boston Water And Sewer Commission (Mwra)Natural background0.43 mg/LNov 2023675,647 served Bourne Water DistrictNatural background0.58 mg/LFeb 202622,500 served Boylston Water DistrictHuman impact likely2.89 mg/LJun 20263,343 served Braintree Water And Sewer Dept.Natural background0.03 mg/LJun 202639,143 served Breton EstatesNatural background0.13 mg/LOct 202548 served Brewster Water DepartmentNatural background0.61 mg/LFeb 202635,000 served Briarwood TownhomesNatural background0.01 mg/LMay 202640 served Bridgewater Water DepartmentHuman impact likely2.35 mg/LApr 202628,633 served Briggsville Water DistrictNatural background0.17 mg/LApr 2026180 served Brimfield Housing AuthorityNatural background0.01 mg/LApr 202660 served Brockton Water DepartmentNatural background0.13 mg/LMar 2026105,643 served Brook Village CondominiumNatural background0.76 mg/LApr 2026400 served Brookfield Meadows MhpNatural background0.03 mg/LApr 2026120 served Brookfield Water DepartmentNatural background0.03 mg/LJun 20261,008 served Brookside Mobile Home ParkNatural background0.23 mg/LApr 202667 served Brookside VillageNatural background0.02 mg/LNov 202580 served Buffumville Heights Estates CondominiumNatural background0.38 mg/LApr 202640 served Burlington Water DeptNatural background0.19 mg/LMay 202626,680 served Buzzards Bay Water DistrictHuman impact likely1.60 mg/LMay 20267,700 served Byfield Water DistrictNatural background0.47 mg/LMay 20262,228 served

C

Cady Brook Crossing CondominiumsNatural background0.01 mg/LApr 202675 served Cambridge Water DepartmentNatural background0.62 mg/LJun 2026118,214 served Canton Water DeptHuman impact likely1.62 mg/LJan 202622,453 served Carriage House CondominiumHuman impact likely2.49 mg/LApr 202668 served Carver Municipal BuildingsNatural background0.03 mg/LSep 2025100 served Cedarwood ApartmentsNatural background0.03 mg/LApr 202625 served Centerville Osterville Marstons Mills WdHuman impact clear4.70 mg/LAug 202550,000 served Centre Village ApartmentsNatural background0.57 mg/LApr 202636 served Century Mill EstatesNatural background0.56 mg/LMay 2026135 served Charlton Manor Rest HomeNatural background0.11 mg/LMay 202626 served Chatham Water DepartmentNatural background0.17 mg/LJan 202630,000 served Chelmsford Water DistrictNatural background0.86 mg/LFeb 202628,750 served Chelsea Water Dept. (Mwra)Natural background0.10 mg/LFeb 202638,319 served Cherry Valley/ Rochdale Water DistrictNatural background0.03 mg/LMay 20263,696 served Cheshire Water DeptHuman impact likely1.31 mg/LApr 20261,407 served Chester Water DeptNatural background0.06 mg/LMay 2026750 served Clark Shores Water CorporationNatural background0.74 mg/LOct 2025350 served Cliffside ApartmentsNatural background0.36 mg/LNov 2025500 served Clinton Water DeptNatural background0.03 mg/LAug 202515,530 served Cobblers Creek CondominiumsNatural background0.36 mg/LAug 202525 served Codman Hill CondominiumNatural background0.06 mg/LApr 2026360 served Cohasset Water DeptNatural background0.05 mg/LMay 20267,555 served Colony Heights CondominiumHuman impact likely2.54 mg/LApr 2026120 served Colrain Fire District #1Natural background0.24 mg/LApr 2026100 served Concord Water DeptNatural background0.92 mg/LMay 202618,788 served Cool Sandy Beach Community Water SystemNatural background0.03 mg/LApr 202670 served Cotuit Fire District Water DepartmentHuman impact likely2.47 mg/LApr 20264,938 served Countryside CondominiumNatural background0.88 mg/LJun 202630 served Craftsman Village CondominiumsNatural background0.03 mg/LJun 202640 served Cranberry KnollNatural background0.15 mg/LJun 202640 served Cranberry Village Residents AssociationNatural background0.55 mg/LApr 2026414 served Crescent Valley CondosNatural background0.01 mg/LAug 202578 served Cummington Water DeptHuman impact likely1.24 mg/LApr 2026320 served Curtis Hill CondominiumHuman impact likely1.52 mg/LApr 202696 served

D

Dalton Fire DistrictNatural background0.35 mg/LMay 20266,330 served Danvers Water Dept.Natural background0.25 mg/LAug 202528,087 served Dartmouth Water DivisionNatural background0.77 mg/LFeb 202624,630 served Dedham Westwood Water Dist.Human impact likely1.13 mg/LJan 202641,630 served Deerfield EstatesNatural background0.05 mg/LApr 2026100 served Deerfield Fire DistrictHealth-study range7.01 mg/LApr 20261,300 served Dennis Water DistrictNatural background0.91 mg/LMay 202565,000 served Devens MassdevelopmentNatural background0.48 mg/LMay 20266,500 served Dighton Water DistrictHuman impact likely1.12 mg/LApr 20265,264 served Douglas Water DepartmentHuman impact likely2.10 mg/LMay 20264,400 served Dracut Water Supply DistrictHuman impact likely1.28 mg/LJul 202525,808 served Dragon Hill CondominiumsNatural background0.06 mg/LDec 202530 served Dudley Water DepartmentHuman impact likely1.63 mg/LApr 20265,515 served Dunstable Water DepartmentHuman impact likely2.06 mg/LMay 2026337 served Duxbury Water DepartmentHuman impact clear3.40 mg/LMay 202616,387 served

E

Eagle Hill SchoolNatural background0.07 mg/LSep 2025300 served Eaglebrook SchoolNatural background0.06 mg/LMay 2026350 served East Bridgewater Water DeptHuman impact likely2.65 mg/LJan 202614,526 served East Brookfield Water DepartmentNatural background0.10 mg/LJun 20261,526 served East Chelmsford Water DistrictNatural background0.03 mg/LJul 20252,800 served East Northfield Water CoNatural background0.03 mg/LOct 2025659 served Town of EasthamHuman impact likely1.24 mg/LMay 20266,199 served Easthampton Water DeptHuman impact likely2.40 mg/LApr 202616,211 served Easton Water DivHuman impact clear3.80 mg/LJan 202623,112 served Edgartown Water DepartmentNatural background0.81 mg/LJul 20258,027 served Egremont Water DeptNatural background0.08 mg/LApr 20261,000 served Elizabeth Brook ApartmentsNatural background0.05 mg/LJul 202554 served Enclave At BoxboroughNatural background0.28 mg/LApr 2026100 served Erving Water DeptNatural background0.39 mg/LApr 2026561 served Essex Water Dept.Natural background0.24 mg/LMay 20263,675 served Estates At Highland RidgeHuman impact likely1.17 mg/LJun 2026100 served

F

Fall River Water DepartmentNatural background0.03 mg/LFeb 202694,000 served Falmouth Water DeptNatural background0.35 mg/LApr 202697,551 served Fields At Sherborn Condo TrustHuman impact likely1.46 mg/LSep 2025110 served Fitchburg Dpw Division of Water SupplyNatural background0.05 mg/LApr 202641,946 served Four Mile VillageNatural background0.20 mg/LJun 2026133 served Foxboro Water DepartmentHuman impact likely2.41 mg/LApr 202618,639 served Foxglove ApartmentsNatural background0.43 mg/LApr 202640 served Franklin Water DepartmentHuman impact clear4.67 mg/LApr 202633,399 served

G

Gardner Water DepartmentNatural background0.05 mg/LJun 202621,287 served Garrison PlaceNatural background0.03 mg/LJul 202532 served Georgetown Water DepartmentNatural background0.07 mg/LMay 20268,766 served Gilbertville Water DistrictNatural background0.10 mg/LJul 20251,089 served Gloucester Public Utility DivisionNatural background0.06 mg/LJan 202637,440 served Gosnold Water DeptNatural background0.17 mg/LSep 2025425 served Gould FarmNatural background0.03 mg/LAug 202593 served Grafton Water DistrictHuman impact likely1.27 mg/LJun 202610,925 served Granby Heights CondominiumsNatural background0.05 mg/LJul 2025152 served Granby Housing AuthorityNatural background0.01 mg/LJul 202561 served Granville Centre Water CoNatural background0.19 mg/LAug 202570 served Great Barrington Fire DistNatural background0.31 mg/LAug 20254,375 served Greenfield Water DepartmentNatural background0.43 mg/LAug 202517,645 served Greylock Estates Homeowners AssociationNatural background0.03 mg/LJul 202525 served Griswoldville Water DistrictNatural background0.11 mg/LApr 2026125 served Groton Water DepartmentNatural background0.51 mg/LApr 20265,456 served Groveland Water DepartmentNatural background0.95 mg/LApr 20266,743 served

H

Hadley Dpw Water DivisionNatural background0.56 mg/LJul 20254,819 served Halifax Water DepartmentNatural background0.29 mg/LMay 20267,553 served Hamilton Water DeptHealth-study range6.58 mg/LMay 20267,377 served Hampden Housing AuthorityHuman impact likely2.30 mg/LJul 202559 served Hanover Water DeptHuman impact likely1.68 mg/LMar 202614,984 served Hanscom Family Housing (Landings)Natural background0.62 mg/L20243,067 served Hanson Water DepartmentNatural background0.48 mg/LSep 20259,546 served Harborside VillageHuman impact likely1.10 mg/LJul 2025165 served Hardwick Center Water DistrictNatural background0.62 mg/LJul 202580 served Harvard Green CondominiumsNatural background0.30 mg/LApr 2026150 served Harvard Ridge CondominiumHuman impact likely2.61 mg/LJun 2026350 served Harvard Water DepartmentNatural background0.59 mg/LMay 20261,422 served Harwich Water DepartmentHuman impact likely1.80 mg/LAug 202539,144 served Hatfield Water DeptHuman impact likely1.23 mg/LJul 20253,183 served Haverhill Water DeptNatural background0.05 mg/LMay 202663,235 served Haystack EstatesHuman impact likely1.16 mg/LJun 202660 served Heron Pond At StockbridgeNatural background0.35 mg/LOct 202550 served Herring Cove Condominiums TrustHuman impact clear4.90 mg/LMar 202625 served High Lawn FarmNatural background0.16 mg/LAug 202543 served Highland Ridge CondominiumsNatural background0.93 mg/LApr 2026132 served Hillcrest Water DistrictNatural background0.03 mg/LJun 20261,500 served Hillside Heights of GranbyNatural background0.26 mg/LApr 202630 served Hinsdale Water DeptNatural background0.27 mg/LAug 20251,800 served Holden Water Division, DpwHuman impact likely1.16 mg/LMay 202617,951 served Holliston Water DepartmentHuman impact clear3.31 mg/LMay 202615,713 served Holyoke Water WorksNatural background0.03 mg/LAug 202537,838 served Hopedale Water DepartmentNatural background0.75 mg/LMay 20266,017 served Hopkinton Water DepartmentHuman impact likely1.10 mg/LApr 202612,586 served Horton Estates Condominium Trust, Inc.Natural background0.06 mg/LJul 202564 served Housatonic Water WorksNatural background0.08 mg/LJul 20251,391 served Hubbardston House ApartmentsHuman impact likely2.60 mg/LMar 202640 served Hudson Water SupplyHuman impact likely1.00 mg/LJun 202520,032 served Huntington Water DeptNatural background0.27 mg/LSep 20252,180 served Hutchinson Water LlcNatural background0.06 mg/LApr 2026400 served Hyannis Water System, Town of BarnstableNatural background0.79 mg/LApr 202635,000 served

I

Inima Usa / Aquaria LlcNatural background0.28 mg/LMar 2026105,643 served Ipswich Dpu Water DeptHuman impact clear3.11 mg/LMar 202613,090 served

J

Jakes Path PwsNatural background0.05 mg/LSep 2025168 served Jiminy Peak ResortNatural background0.85 mg/LJun 20261,000 served Juniper Hill Water CompanyNatural background0.03 mg/LJun 2026220 served

K

Kings Grant Water Co IncHealth-study range5.43 mg/LJun 2026434 served Kingston Water DepartmentHuman impact likely1.69 mg/LJun 202614,712 served Kuehns Way LlcNatural background0.85 mg/LJul 202580 served

L

Lake Point VillageNatural background0.12 mg/LApr 202666 served Lancaster Water DepartmentHuman impact likely1.69 mg/LMay 20266,000 served Lancaster Woods CondominiumsNatural background0.03 mg/LApr 2026120 served Lanesborough Fire And Water DistrictNatural background0.91 mg/LJul 20252,324 served Laurel Hill CondominiumsNatural background0.01 mg/LSep 202564 served Lawrence Water WorksNatural background0.45 mg/LJan 202688,877 served Lee Water DeptNatural background0.07 mg/LMay 20265,420 served Leicester Water Supply DistrictNatural background0.03 mg/LJun 20263,200 served Leland FarmsNatural background0.56 mg/LApr 202525 served Lenox Dpw Water DivisionNatural background0.03 mg/LJul 20259,800 served Leominster Water DivisionNatural background0.53 mg/LApr 202641,683 served Liberty House CondominiumNatural background0.03 mg/LMay 202680 served Lincoln Water DeptNatural background0.53 mg/LApr 20265,593 served Linda Manor Nursing HomeNatural background0.17 mg/LOct 2025120 served Littleton Water DepartmentHuman impact likely1.08 mg/LApr 20269,611 served Long Pond Realty TrustHuman impact clear3.00 mg/LMar 202690 served Lowell Regional Water UtilityNatural background0.47 mg/LFeb 2026115,000 served Lunenburg Water DistrictNatural background0.62 mg/LJun 20267,219 served Lynn Water And Sewer CommNatural background0.11 mg/LFeb 2026101,253 served Lynnfield Center Water DistrictHuman impact likely2.04 mg/LApr 20268,569 served

M

Madden EstatesNatural background0.69 mg/LApr 202650 served Maillet Woods CondominiumsNatural background0.18 mg/LJun 202655 served Manchaug Water District of SuttonNatural background0.05 mg/LJun 2026476 served Manchester By The Sea DpwNatural background0.06 mg/LJul 20255,170 served Mansfield Water DivisionHuman impact likely1.06 mg/LFeb 202623,289 served Maplebrook ApartmentsHuman impact likely2.76 mg/LApr 202633 served Marblehead Water Dept. (Mwra)Natural background0.17 mg/LMay 202420,441 served Marion Water DivisionHuman impact likely1.76 mg/LApr 20265,761 served Marlborough Dpw Water Div. (Mwra)Natural background0.49 mg/LMay 202441,799 served Marshfield Water DepartmentHealth-study range6.70 mg/LJun 202634,000 served Masac PlymouthNatural background0.05 mg/LMay 2026210 served Mashpee Water DistrictHuman impact likely1.90 mg/LJan 202636,922 served Massasoit Hills Trailer ParkHuman impact likely1.95 mg/LJun 2026120 served Mattapoisett River Valley W.D.Natural background0.65 mg/LMay 202629,600 served Mattapoisett Water DepartmentNatural background0.64 mg/LMar 20267,685 served Maynard Dpw, Water DivisionNatural background0.48 mg/LMay 202610,401 served Maynard State LlcNatural background0.07 mg/LApr 202535 served Mci Norfolk/Cedar Junction/WalpoleNatural background0.34 mg/LMay 20262,200 served Mci ShirleyNatural background0.30 mg/LJun 20263,500 served Meadow Woods Estate Homeowners Assn, IncHuman impact likely2.10 mg/LApr 2026120 served Meadowbrook Acres Mobile Home ParkNatural background0.24 mg/LApr 2026137 served Meadowbrook Village CondominiumsNatural background0.16 mg/LJul 2025150 served Meadowbrook Water TrustHuman impact likely2.10 mg/L202357 served Medfield Water Dept.Natural background0.42 mg/LMar 202612,894 served Medford Water Dept. (Mwra)Natural background0.56 mg/LAug 202561,700 served Medway Water DepartmentHuman impact likely1.89 mg/LApr 202613,115 served Mendon Housing AuthorityNatural background0.25 mg/LApr 202631 served Menemsha Water CompanyNatural background0.38 mg/LDec 2025841 served Merrimac Water DepartmentNatural background0.89 mg/LMay 20267,193 served Methuen Water DeptNatural background0.58 mg/LFeb 202653,059 served Middleborough Water SupplyHuman impact likely2.90 mg/LJan 202615,350 served Milford Water DepartmentNatural background0.12 mg/LApr 202630,379 served Mill River Water Takers AssociationNatural background0.87 mg/LDec 2025150 served Millis Water DeptNatural background0.70 mg/LMay 20269,002 served Milton Water Dept. (Mwra)Natural background0.12 mg/LJun 202528,630 served Monroe Water DistrictNatural background0.20 mg/LJul 202655 served Monson Water And Sewer DeptHuman impact likely1.20 mg/LAug 20254,212 served Montague Center Water DistrictNatural background0.44 mg/LJul 2025450 served Monterey Water CompanyNatural background0.05 mg/LJul 2025149 served Mount St Marys AbbeyHuman impact likely1.32 mg/LJul 202560 served MwraNatural background0.10 mg/LJun 20262,660,000 served

N

Nanatomqua Mobile Home ParkNatural background0.07 mg/LMay 2026123 served Natick Water And Sewer DivisionHuman impact likely1.30 mg/LFeb 202637,006 served Needham Water DeptNatural background0.58 mg/LJan 202633,130 served Nemasket Health Care CenterNatural background0.05 mg/LAug 202590 served City of New Bedford DpiNatural background0.03 mg/LFeb 2026101,079 served Newburyport Water DepartmentHuman impact likely2.03 mg/LJan 202620,335 served Newton Water Dept. (Mwra)Natural background0.24 mg/LMay 202588,415 served Noquochoke Village LlcNatural background0.38 mg/LApr 2026180 served Norfolk Water DivisionHuman impact likely1.41 mg/LApr 20267,602 served North Adams Water DeptNatural background0.17 mg/LSep 202513,000 served North Andover Water DeptNatural background0.05 mg/LJan 202630,915 served North Attleboro Water DeptHuman impact clear3.50 mg/LMar 202628,863 served North Brookfield Water DepartmentNatural background0.05 mg/LMay 20263,903 served North Carver Water DistrictNatural background0.03 mg/LSep 2023300 served North Chelmsford Water DistHuman impact likely1.01 mg/LApr 20267,498 served North Raynham Water DistrictHuman impact likely1.54 mg/LApr 20263,902 served North Reading Water Dept.purchased waterNatural background0.41 mg/LJan 202616,379 served North Sagamore Water DistrictHuman impact clear3.13 mg/LApr 20264,668 served Northampton Water DivisionHuman impact likely2.08 mg/LOct 202529,571 served Northbrook Village I / Berlin Ret.Human impact likely1.46 mg/LSep 202548 served Northbrook Village IiHuman impact likely2.32 mg/LSep 202580 served Northfield Mt Hermon SchoolHuman impact likely1.55 mg/LJul 2024750 served Northfield Water DistrictNatural background0.68 mg/LOct 2025800 served Norton Water DepartmentHuman impact likely1.26 mg/LApr 202619,161 served Norwell Water DepartmentHuman impact clear3.20 mg/LApr 202611,495 served Norwood Water Dept. (Mwra)Natural background0.38 mg/LDec 202529,909 served

O

Oak Bluffs Water DistrictNatural background0.05 mg/LFeb 202624,000 served Old Farm Road Water TrustHealth-study range6.28 mg/LJun 202640 served Onset Fire Districtwater Dept.Natural background0.53 mg/LApr 20265,392 served Orange Water DeptHealth-study range6.25 mg/LJun 20266,526 served Orleans Water DepartmentNatural background0.40 mg/LMay 202618,921 served Oronoque Condominium TrustNatural background0.23 mg/LOct 202525 served Otis Air National Guard BaseHuman impact likely2.00 mg/LApr 20266,000 served

P

Paddock EstatesHuman impact likely1.13 mg/LApr 2026463 served Palmer Water District No.1Natural background0.44 mg/LDec 20254,789 served Peabody Water Dept.Natural background0.15 mg/LJun 202654,481 served Pembroke Water Division DpwHuman impact likely1.62 mg/LMar 202618,251 served Pepperell Dpw Water DivisionHuman impact likely1.53 mg/LMay 20269,217 served Pilot Grove ApartmentsHuman impact likely2.63 mg/LMay 2026175 served Pilot Grove Apartments IiHuman impact likely2.30 mg/LMay 2026134 served Pine Hill CondominiumHuman impact likely1.94 mg/LApr 202695 served Pine Hill Village CondominiumsNatural background0.03 mg/LJun 202660 served Pine Ridge Condominiums At Sampsons PondNatural background0.18 mg/LJul 202589 served Pine Valley PlantationHuman impact likely1.69 mg/LApr 2026600 served Pinetree VillageHuman impact likely1.80 mg/LMay 2026348 served Pinewood On The Green CondosNatural background0.95 mg/LSep 202550 served Pittsfield Dpu Water DeptNatural background0.03 mg/LDec 202543,927 served Plainville Water DepartmentNatural background0.91 mg/LJul 20258,805 served Pleasant WaterNatural background0.53 mg/LJul 2025200 served Plymouth Water DepartmentNatural background0.05 mg/LFeb 202646,799 served Pond Ridge Condo AssnNatural background0.45 mg/LNov 202588 served Provincetown Water DepartmentNatural background0.62 mg/LAug 202522,250 served

Q

Quabbin Sunrise Cooperative IncNatural background0.05 mg/LOct 202565 served Quincy Water Dept. (Mwra)Natural background0.09 mg/LMay 2025106,000 served

R

Randolph/Holbrook Joint Water BoardNatural background0.05 mg/LJan 202645,767 served Raynham Center Water DistrictNatural background0.48 mg/LApr 202610,824 served Reading Water Department (Mwra)Natural background0.20 mg/LAug 202527,358 served Regency At Bolton CondominiumsNatural background0.03 mg/LJun 2026148 served Regency At Stow CondominiumsHuman impact likely2.61 mg/LApr 2026132 served River Crossing CondominiumHuman impact likely1.76 mg/LApr 2026150 served RiverbridgeNatural background0.54 mg/LApr 20261,330 served Rockport Water DeptNatural background0.05 mg/LJan 202610,000 served Rockwood MeadowsHuman impact likely1.51 mg/LSep 2025110 served Rowley Water DepartmentNatural background0.22 mg/LApr 20266,283 served Russell Water DeptNatural background0.88 mg/LOct 20251,228 served Rutland Water DepartmentNatural background0.19 mg/LMay 20265,605 served

S

Saint Josephs AbbeyNatural background0.12 mg/LMay 202645 served Salem And Beverly Water Supply BoardNatural background0.05 mg/LAug 202590,330 served Salisbury Water DivisionNatural background0.88 mg/LMay 202620,000 served Sandwich Water DistrictHuman impact likely1.60 mg/LJun 202623,000 served Sawyer Hill EcovillageNatural background0.22 mg/LMar 2026272 served Scantic Valley Water DistrictNatural background0.04 mg/LJul 2025100 served Scituate Water DivisionHuman impact likely2.62 mg/LMar 202619,297 served Scotts Grove LlcNatural background0.22 mg/LOct 202536 served Sea Oaks CondominiumsHuman impact likely1.60 mg/LApr 2026222 served Seekonk Water DistrictHuman impact likely1.17 mg/LApr 202614,704 served Sharon Water DeptHuman impact clear4.79 mg/LJun 202616,846 served Shelburne Falls Fire DistrictNatural background0.27 mg/LDec 20251,806 served Shirley Water DistrictHuman impact likely1.31 mg/LApr 20264,121 served Shrewsbury Water DepartmentNatural background0.64 mg/LApr 202638,325 served Siasconset Water DepartmentNatural background0.89 mg/LMay 20263,000 served Silver MeadowNatural background0.01 mg/LOct 202525 served Silverleaf Hollow CondominiumsNatural background0.03 mg/LJun 202640 served Somerset Water DepartmentNatural background0.11 mg/LFeb 202618,303 served South Ashmere Water Association IncHuman impact likely1.29 mg/LJul 2025150 served South Deerfield Water Supply DistrictNatural background0.03 mg/LMay 20263,800 served South Grafton Water DistrictHuman impact likely1.30 mg/LMay 20263,262 served South Hadley Fd #1 (Mwra)Natural background0.01 mg/LDec 202414,800 served South Hadley Fire District #2 Water DeptHuman impact likely1.50 mg/LOct 20256,200 served South Meadow VillageNatural background0.86 mg/LApr 2026750 served South Royalston Improvement CorpNatural background0.01 mg/LNov 2025275 served Southampton Water DeptHuman impact likely1.33 mg/LOct 20254,853 served Southborough Dpw Water Division (Mwra)Natural background0.06 mg/LSep 202510,514 served Southbridge Water DepartmentNatural background0.09 mg/LApr 202619,180 served Southfield Redevelopement AuthorityNatural background0.47 mg/L20231,800 served Southfield Water CompanyNatural background0.18 mg/LOct 202580 served Southwick Water DeptHuman impact clear3.44 mg/LOct 20257,646 served Spencer Water DepartmentNatural background0.82 mg/LJun 20267,037 served Sports Haven Mobile Home ParkNatural background0.15 mg/LApr 2026107 served Springfield Water And Sewer CommissionNatural background0.13 mg/LOct 2025167,954 served Staffordshire Country EstatesHuman impact likely1.03 mg/LApr 2026140 served Sterling Water DepartmentHuman impact likely1.59 mg/LMay 20266,754 served Still Meadow Village CondominiumsNatural background0.29 mg/LJul 202550 served Stockbridge Water DeptNatural background0.03 mg/LNov 20252,800 served Stones Throw CondosHuman impact likely2.79 mg/LSep 202580 served Stoughton Water DepartmentHuman impact clear4.16 mg/LApr 202629,281 served Sturbridge Crossing CondominiumNatural background0.06 mg/LApr 202652 served Sturbridge Retirement Coop. Corp.Natural background0.14 mg/LApr 2026350 served Sturbridge Water DepartmentNatural background0.19 mg/LMay 20264,567 served Sudbury Water DistrictHuman impact clear4.51 mg/LJun 202618,416 served Sunderland Water DistrictNatural background0.26 mg/LOct 20253,190 served Sunset Ridge CondominiumsHuman impact likely2.04 mg/LJun 202642 served Swansea Water DistrictNatural background0.44 mg/LMay 202617,375 served Sweet Wood Retirement CommunityNatural background0.47 mg/LOct 2025200 served

T

Taunton Water DivisionNatural background0.03 mg/LFeb 202662,165 served Templeton Munic. Light And Water PlantHuman impact likely1.93 mg/LApr 20266,152 served Tewksbury HospitalHuman impact likely1.40 mg/LJun 20262,500 served Tewksbury Water DepartmentNatural background0.39 mg/LMay 202631,342 served The Macduffie SchoolHuman impact likely2.45 mg/LJul 2025305 served The Meeting House @ Stow CondoNatural background0.03 mg/LMay 202692 served The Preserve At Hopkinton CondoHuman impact clear3.48 mg/LJun 202680 served The Reserve At Spring HillNatural background0.03 mg/LApr 2026300 served The Village At Shepley HillNatural background0.03 mg/LApr 202652 served Three Rivers Fire DistrictHuman impact likely2.12 mg/LNov 20253,258 served Tisbury Water WorksNatural background0.50 mg/LFeb 20266,082 served Topsfield Water DepartmentHuman impact likely1.39 mg/LJun 20265,435 served Toria Heights CondominiumNatural background0.01 mg/LApr 202660 served Townhouses @ Copper LanternNatural background0.10 mg/LJun 2025176 served Townsend Water DepartmentNatural background0.83 mg/LMay 20266,500 served Trail Ridge CondominiumsNatural background0.03 mg/LApr 2026104 served Turners Falls Water DeptNatural background0.14 mg/LJul 20258,080 served

U

Upper Cape Regional Water CooperativeNatural background0.09 mg/LAug 202556,250 served Upton Dpw Water/Wastewater DivisionHuman impact likely1.10 mg/LApr 20264,420 served Uxbridge Dpw, Water DivisionHuman impact likely1.31 mg/LApr 202611,525 served

V

Vantage At HampdenNatural background0.37 mg/LJul 2025100 served View Drive Water AssociationNatural background0.12 mg/LOct 202538 served Village At Highland ParkNatural background0.17 mg/LApr 202650 served Villages At StowHuman impact likely2.02 mg/LApr 2026300 served

W

Wagon Wheel Community, Inc.Natural background0.74 mg/LMay 2025228 served Wakefield Water DeptNatural background0.19 mg/LMar 202627,090 served Walpole Water DeptNatural background0.91 mg/LFeb 202624,070 served Waltham Water DepartmentNatural background0.48 mg/LJul 202565,218 served Wannacomet Water CompanyHuman impact likely1.20 mg/LMay 202627,703 served Ware Water DeptHuman impact likely2.16 mg/LNov 202410,066 served Wareham Fire DistrictNatural background0.34 mg/LJan 202621,418 served Warren Water DistrictNatural background0.42 mg/LNov 20252,289 served Washington AcresHuman impact likely2.49 mg/LApr 202630 served Watertown Water Dept. (Mwra)Natural background0.09 mg/LApr 202635,329 served Waterview Park LlcHealth-study range6.70 mg/LApr 2026102 served Waubeeka SpringsNatural background0.49 mg/LOct 202550 served Wayland Water DepartmentHuman impact clear3.50 mg/LMay 202613,196 served Webster Water DepartmentNatural background0.17 mg/LJun 202617,776 served Weir River Water SystemNatural background0.36 mg/LAug 202545,339 served Wellesley CollegeHuman impact likely2.50 mg/LApr 20263,000 served Wellesley Water DivisionHuman impact likely1.10 mg/LMar 202629,550 served Wellfleet ApartmentsHealth-study range5.50 mg/LApr 202648 served Wellfleet Municipal Water SystemNatural background0.17 mg/LApr 2026750 served Wenham Water Dept.Human impact clear3.30 mg/LJun 20263,942 served West Boylston Water DistrictNatural background0.16 mg/LJun 20267,132 served West Bridgewater Water DeptNatural background0.05 mg/LApr 20267,709 served West Brookfield Water DepartmentHuman impact likely1.05 mg/LApr 20263,217 served West Cummington Water DeptNatural background0.44 mg/LApr 2026110 served West Groton Water Supply DistrictNatural background0.76 mg/LJun 20261,853 served West Newbury Water DepartmentNatural background0.61 mg/LApr 20263,080 served West Springfield Dpw Water DivisionHuman impact clear3.73 mg/LOct 202528,835 served West Stockbridge Water DeptNatural background0.07 mg/LOct 2025535 served West Warren Water DistrictHuman impact likely1.44 mg/LApr 2026927 served Westborough Water DepartmentHuman impact likely1.30 mg/LMay 202621,567 served Westfield Dpwwater DivisionHuman impact likely1.50 mg/LNov 202541,094 served Westford Water DepartmentHuman impact likely1.91 mg/LMay 202618,680 served Westport Senior VillageHuman impact likely1.18 mg/LAug 2025150 served Weymouth Water DepartmentNatural background0.55 mg/LJul 202557,613 served Whately Water DepartmentNatural background0.06 mg/LOct 2025900 served Wheelwright Water DistrictNatural background0.29 mg/LJul 2025300 served White Birch Garden ApartmentsNatural background0.99 mg/LJul 202525 served White Pines CondominiumsNatural background0.55 mg/LOct 2025225 served Whitinsville Water CompanyNatural background0.51 mg/LMay 20267,933 served Whitman Water SystemNatural background0.18 mg/L202514,837 served Whitney Estates CondominiumsNatural background0.87 mg/LMay 202640 served Wildwood CondominiumNatural background0.03 mg/LJul 202525 served Wilkinsonville Water DistrictHuman impact likely1.18 mg/LMay 20262,773 served Williamsburg Water DeptNatural background0.31 mg/LOct 20251,575 served Williamstown Water DeptNatural background0.06 mg/LNov 20257,326 served Willows At BoxfordNatural background0.03 mg/LJan 202630 served Wilmington Water DeptNatural background0.84 mg/LJul 202522,481 served Winchester Water DeptNatural background0.05 mg/LJan 202622,970 served Woburn Water Dept.Natural background0.35 mg/LFeb 202640,876 served Woodhaven Elder Housing CommitteeNatural background0.32 mg/LJun 202630 served Woodland Mhp LlcNatural background0.82 mg/LApr 202636 served Woodland RidgeNatural background0.37 mg/LMay 2026125 served Woodland Walk ApartmentsHuman impact likely1.18 mg/LMay 202676 served Woodward VillageNatural background0.03 mg/LJul 202554 served Worcester Dpwp, Water Supply DivisionNatural background0.09 mg/LMay 2026206,518 served Worthington Fire DistrictNatural background0.83 mg/LNov 2025565 served Wrentham Developmental CenterHuman impact clear3.74 mg/LApr 2026937 served Wrentham Water DivisionHuman impact likely1.10 mg/LJun 202612,190 served

Y

Yarmouth Water DepartmentHuman impact clear4.30 mg/LApr 202638,900 served

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NitrateSmart

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

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

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