We read 19 results from Hamilton Pws’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 1,813 people · Water system ID MO1010342 · 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 |
|---|---|---|---|---|
| Atrazinehighest measured · range ND to 0.72 · 2025 report, page 2 | 0.72 ppb | 0.15 ppb | 3 ppb | Above the health goal4.8x the health goal |
| Aluminumhighest measured · range 0.06 to 0.06 · 2025 report, page 3 | 0.06 ppm | — | 0.2 ppm guideline | Within the guideline |
| Bariumhighest measured · range 0.08 to 0.08 · 2025 report, page 2 | 0.08 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 21.2 to 21.2 · 2025 report, page 3 | 21.2 ppm | — | 250 ppm guideline | Within the guideline |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 2 | 0.03 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 20 to 46.1 · DBPDUAL-01, highest of 2 sources · 2025 report, page 2 | 35 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 33.8 to 74.4 · DBPDUAL-01, highest of 2 sources · 2025 report, page 2 | 51 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.17 to 0.17 · 2025 report, page 2 | 0.17 ppm | 1 ppm | 4 ppm | Below the health goal |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 2 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)highest measured · range 0.31 to 0.31 · 2025 report, page 2 | 0.31 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHhighest measured · range 8.07 to 8.07 · 2025 report, page 3 | 8.07 | — | — | Normal range |
| Total dissolved solidshighest measured · range 164 to 164 · 2025 report, page 3 | 164 ppm | — | 500 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 232 to 232 · highest of 2 sources · 2025 report, page 3 | 232 ppm | None set | None | No health limit |
| Calciumhighest measured · range 32.7 to 32.7 · 2025 report, page 3 | 32.7 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 6.26 to 6.26 · 2025 report, page 3 | 6.26 gpg (107 ppm) | — | — | Moderately hard |
| Magnesiumhighest measured · range 6.21 to 6.21 · 2025 report, page 3 | 6.21 ppm | None set | None | No health limit |
| Nickelhighest measured · range 1.2 to 1.2 · printed as 0.0012 MG/L · 2025 report, page 3 | 1.2 ppb | None set | None | No health limit |
| Potassiumhighest measured · range 6.28 to 6.28 · 2025 report, page 3 | 6.28 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 17.9 to 17.9 · 2025 report, page 3 | 17.9 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. 1 number we weren’t sure about is held back until a person checks.
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.
Industrial chemicals and pesticides
Found: Atrazine
What removes it: Carbon block or RO.
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