We read 11 results from Keene Water Dept’s 2025 water quality report. 1 result over a legal limit and 1 above a health goal or guideline.
Serves about 30,000 people · Water system ID NH1241010 · Read the district’s 2025 report (opens in a new tab)
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Results from the 2025 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Turbidity (cloudiness)highest measured · listed as a violation in the report · Treatment plant · 2025 report, page 4 | 1.08 NTU | None set | 1 NTU | Over the legal limit1.1x the legal limit |
| PFOS (a PFAS)as reported · listed as a violation in the report · Treated water · 2025 report, page 4 | 1.3 ppt | 1 ppt | 15 ppt (New Hampshire) now; 4 ppt from 2029 | Above the health goal1.3x the health goal |
| Chlorineas reported · range 0.28 to 1.59 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 0.97 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 57 homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 4 | 0.11 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)as reported · range 14.2 to 41.9 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 35 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)as reported · range 10.6 to 81.9 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 63 ppb | None set | 80 ppb | Below the legal limit |
| Lead90th percentile of 57 homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 4 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)as reported · range 0.76 to 1.2 · listed as a violation in the report · sampled 2024 · Treated water · 2025 report, page 4 | 1.03 ppm | 10 ppm | 10 ppm | Below the health goal |
| Hardnesshighest measured · range 0.41 to 3.28 · Treated water · 2025 report, page 5 | 3.28 gpg (56 ppm) | — | — | Soft |
| PFBA (a PFAS)as reported · Treated water · 2025 report, page 5 | 1.7 ppt | None set | None | No health limit |
| Sodiumas reported · sampled 2024 · Treated water · 2025 report, page 4 | 17 ppm | None set | None | No health limit |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
Sediment or cloudy water
Found: Turbidity (cloudiness)
What removes it: Sediment filter.
PFAS ("forever chemicals")
Found: PFOS (a PFAS)
What removes it: Reverse osmosis.
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