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Nitrate at Sunset Hills Domestic Water Association

Oregon · system OR4105258 · serves 41 people

Band placed by this system's most recent reported result within a rolling three-year window; the three-year range below shows the full spread.

The reading

1.03 mg/L as N
most recent reading · Nov 2025
1.02 to 1.03
three-year range (mg/L as N)
3 samples
what this result rests on
41
people served

A single reading is not a complete account of what a household drinks, so the three-year range and the number of tests behind it are shown too — a reading backed by many tests over three years is a fuller picture than one from a single sample.

Source: Oregon Health Authority - Drinking Water Services record · Oregon · system OR4105258 · the three years from August 9, 2023 to August 9, 2026

Where this ranks

This system's nitrate sits around the middle nationally. Systems reporting less serve about 70% of everyone on NitrateSmart's tracked supply; the other about 30% are on systems reporting the same or more. That compares what systems reported, not what comes out of any one tap.

Natural backgroundHuman impact likelyHuman impact clearHealth-study rangeAbove the federal limit

What "Human impact likely" means

Nitrate here is low, but a little above natural background[1] — enough to suggest that fertilizer, manure, a septic system, or wastewater has reached the source. This is a statement about where the nitrate came from, not about harm.

Sources

  1. Dubrovsky, N.M., and others (2010). Nutrients in the Nation's Streams and Groundwater, 1992–2004. U.S. Geological Survey Circular 1350.

The bands describe how strongly human activity, read from nitrate, has marked a water source — they are not a safety verdict. More on what the numbers mean and where nitrate comes from.

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

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