We read 16 results from Thayer Pws’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 2,200 people · Water system ID MO4010788 · 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 |
|---|---|---|---|---|
| Lead90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | 1.02 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal5.1x the health goal |
| Bariumhighest measured · range 0.02 to 0.03 · sampled 2024 · 2025 report, page 2 | 0.03 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range ND to 5.85 · sampled 2024 · 2025 report, page 2 | 5.85 ppm | — | 250 ppm guideline | Within the guideline |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | 0.16 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Ironhighest measured · range ND to 0.0053 · sampled 2024 · 2025 report, page 2 | 0.0053 ppm | — | 0.3 ppm guideline | Within the guideline |
| Nitrate (as N)highest measured · range 0.19 to 1.12 · 2025 report, page 2 | 1.12 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHhighest measured · range 7.55 to 7.66 · sampled 2024 · 2025 report, page 2 | 7.66 | — | — | Normal range |
| Total dissolved solidshighest measured · range 297 to 329 · sampled 2024 · 2025 report, page 2 | 329 ppm | — | 500 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.0036 to 0.0073 · sampled 2024 · 2025 report, page 2 | 0.0073 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 317 to 388 · sampled 2024 · 2025 report, page 2 | 388 ppm | None set | None | No health limit |
| Calciumhighest measured · range 66.1 to 72.5 · sampled 2024 · 2025 report, page 2 | 72.5 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 19.1 to 20.7 · sampled 2024 · 2025 report, page 2 | 20.7 gpg (354 ppm) | — | — | Very hard |
| Magnesiumhighest measured · range 39.2 to 42 · sampled 2024 · 2025 report, page 2 | 42 ppm | None set | None | No health limit |
| Nickelhighest measured · range 2.13 to 2.45 · printed as 0.00245 MG/L · sampled 2024 · 2025 report, page 2 | 2.45 ppb | None set | None | No health limit |
| Potassiumhighest measured · range ND to 1.55 · sampled 2024 · 2025 report, page 2 | 1.55 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 1.29 to 2.54 · sampled 2024 · 2025 report, page 2 | 2.54 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.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
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