We read 22 results from Ste Genevieve Pws’s 2025 water quality report. No results over a legal limit or above a health goal.
Serves about 4,999 people · Water system ID MO4010710 · 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 |
|---|---|---|---|---|
| Aluminumhighest measured · range 0.03 to 0.03 · sampled 2024 · 2025 report, page 3 | 0.03 ppm | — | 0.2 ppm guideline | Within the guideline |
| Bariumhighest measured · range 0.03 to 0.03 · sampled 2024 · 2025 report, page 2 | 0.03 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 47.5 to 47.5 · sampled 2024 · 2025 report, page 3 | 47.5 ppm | — | 250 ppm guideline | Within the guideline |
| Chromium (total)highest measured · range 5.32 to 5.32 · sampled 2024 · 2025 report, page 2 | 5.32 ppb | None set | 100 ppb | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | 0.05 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 13.4 to 13.4 · DBPDUAL-01 · 2025 report, page 2 | 13 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 36.1 to 36.1 · DBPDUAL-01 · 2025 report, page 2 | 36 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.14 to 0.14 · sampled 2024 · 2025 report, page 2 | 0.14 ppm | 1 ppm | 4 ppm | Below the health goal |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)highest measured · range 0.47 to 0.47 · 2025 report, page 2 | 0.47 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHhighest measured · range 8.16 to 8.16 · sampled 2024 · 2025 report, page 3 | 8.16 | — | — | Normal range |
| Sulfatehighest measured · range 41 to 41 · sampled 2024 · 2025 report, page 3 | 41 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidshighest measured · range 250 to 250 · sampled 2024 · 2025 report, page 3 | 250 ppm | — | 500 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.0016 to 0.0016 · sampled 2024 · 2025 report, page 3 | 0.0016 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 148 to 148 · sampled 2024 · 2025 report, page 3 | 148 ppm | None set | None | No health limit |
| Calciumhighest measured · range 20.8 to 20.8 · sampled 2024 · 2025 report, page 3 | 20.8 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 7.08 to 7.08 · sampled 2024 · 2025 report, page 3 | 7.08 gpg (121 ppm) | — | — | Hard |
| Lithiumhighest measured · range 19.4 to 19.4 · highest of 2 sources · 2025 report, page 3 | 19.4 ppb | None set | None | No health limit |
| Magnesiumhighest measured · range 16.8 to 16.8 · sampled 2024 · 2025 report, page 3 | 16.8 ppm | None set | None | No health limit |
| Nickelhighest measured · range 1.07 to 1.07 · printed as 0.00107 MG/L · sampled 2024 · 2025 report, page 3 | 1.07 ppb | None set | None | No health limit |
| Potassiumhighest measured · range 6.27 to 6.27 · sampled 2024 · 2025 report, page 3 | 6.27 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 26.8 to 26.8 · sampled 2024 · 2025 report, page 3 | 26.8 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 Ste Genevieve Pws’s water between May 2025 and Nov 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium19.4 ppbFound in 2 of 2 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 in this report is above a health goal or legal limit. If you’re bothered by taste, smell, hardness or spots, or your home has older pipes, the filter catalog and buyer questions can help you pick, and a test of your own tap shows what your plumbing adds.
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