We read 13 results from Aquarion Water/Nh’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 34,000 people · Water system ID NH1051010 · 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 |
|---|---|---|---|---|
| Arsenicaverage · range ND to 4 · listed as a violation in the report · Wells · 2025 report, page 3 | 2 ppb | 0.004 ppb | 10 ppb | Above the health goal500x the health goal |
| Copper90th percentile of homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 3 | 0.38 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1.3x the health goal |
| PFOA (a PFAS)average · range 2 to 4 · listed as a violation in the report · Wells · 2025 report, page 4 | 4 ppt | 0.007 ppt | 12 ppt (New Hampshire) now; 4 ppt from 2029 | Above the health goal571x the health goal |
| PFOS (a PFAS)average · range ND to 3 · listed as a violation in the report · Wells · 2025 report, page 4 | 2 ppt | 1 ppt | 15 ppt (New Hampshire) now; 4 ppt from 2029 | Above the health goal2x the health goal |
| Bariumaverage · range 0.01 to 0.02 · listed as a violation in the report · Wells · 2025 report, page 3 | 0.02 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorideaverage · range 67 to 94 · Wells · 2025 report, page 4 | 80 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.3 to 1.3 · listed as a violation in the report · Distribution system · 2025 report, page 3 | 0.85 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)highest measured · range 2 to 5 · listed as a violation in the report · Distribution system · 2025 report, page 3 | 5 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest measured · range 8 to 21 · listed as a violation in the report · Distribution system · 2025 report, page 3 | 21 ppb | None set | 80 ppb | Below the legal limit |
| Lead90th percentile of homes tested, 1 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 3 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)average · range ND to 1.8 · listed as a violation in the report · Wells · 2025 report, page 3 | 1.1 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfateaverage · range 11 to 32 · Wells · 2025 report, page 4 | 22 ppm | — | 250 ppm guideline | Within the guideline |
| Sodiumaverage · range 52 to 68 · Wells · 2025 report, page 4 | 58 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.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Aquarion Water/Nh’s water between May 2024 and Nov 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA4.7 pptFound in 1 of 8 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS4.5 pptFound in 1 of 8 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- Lithium24.9 ppbFound in 2 of 8 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)
Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.
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.
Copper
Found: Copper
What removes it: Reverse osmosis.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS), PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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