We read 23 results from St Charles County Pwsd 2 Warren’s 2025 water quality report. No results over a legal limit; 6 above a health goal or guideline.
Serves about 1,192 people · Water system ID MO6024629 · 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 |
|---|---|---|---|---|
| Copper90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 2 | 0.66 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal2.2x the health goal |
| Fluoridehighest measured · range 1.33 to 1.37 · sampled 2023 · 2025 report, page 2 | 1.37 ppm | 1 ppm | 4 ppm | Above the health goal1.4x the health goal |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 2 | 1.22 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal6.1x the health goal |
| Radium (combined 226 + 228)highest measured · range 2.2 to 2.2 · sampled 2023 · 2025 report, page 2 | 2.2 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Radium-226highest measured · range 2.2 to 2.2 · sampled 2023 · 2025 report, page 2 | 2.2 pCi/L | 0.05 pCi/L | 5 pCi/L | Above the health goal44x the health goal |
| Total dissolved solidshighest measured · range 497 to 508 · sampled 2023 · 2025 report, page 3 | 508 ppm | — | 500 ppm guideline | Above the guideline1x the guideline (taste, odor or stains; not a health limit) |
| Bariumhighest measured · range 0.04 to 0.04 · sampled 2023 · 2025 report, page 2 | 0.04 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 47.8 to 49.5 · sampled 2023 · 2025 report, page 3 | 49.5 ppm | — | 250 ppm guideline | Within the guideline |
| Disinfection byproducts (HAA5)highest running annual average · range 1.27 to 1.27 · DBPDUAL-01 · 2025 report, page 2 | 1 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 4.79 to 4.79 · DBPDUAL-01 · 2025 report, page 2 | 5 ppb | None set | 80 ppb | Below the legal limit |
| Ironhighest measured · range 0.08 to 0.13 · sampled 2023 · 2025 report, page 3 | 0.13 ppm | — | 0.3 ppm guideline | Within the guideline |
| Manganesehighest measured · range 0.0029 to 0.0078 · sampled 2023 · 2025 report, page 3 | 0.0078 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)highest measured · range 0.02 to 0.04 · 2025 report, page 2 | 0.04 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHhighest measured · range 7.81 to 7.89 · sampled 2023 · 2025 report, page 3 | 7.89 | — | — | Normal range |
| Sulfatehighest measured · range 76.5 to 80 · sampled 2023 · 2025 report, page 3 | 80 ppm | — | 250 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.02 to 0.04 · sampled 2023 · 2025 report, page 3 | 0.04 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 376 to 412 · sampled 2023 · 2025 report, page 3 | 412 ppm | None set | None | No health limit |
| Calciumhighest measured · range 61.5 to 62.9 · sampled 2023 · 2025 report, page 3 | 62.9 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 16.4 to 16.6 · sampled 2023 · 2025 report, page 3 | 16.6 gpg (283 ppm) | — | — | Very hard |
| Magnesiumhighest measured · range 30.7 to 30.7 · sampled 2023 · 2025 report, page 3 | 30.7 ppm | None set | None | No health limit |
| Nickelhighest measured · range 2.57 to 2.74 · printed as 0.00274 MG/L · sampled 2023 · 2025 report, page 3 | 2.74 ppb | None set | None | No health limit |
| Potassiumhighest measured · range 7.38 to 8.2 · sampled 2023 · 2025 report, page 3 | 8.2 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 66.6 to 71.6 · sampled 2023 · 2025 report, page 3 | 71.6 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.
Lead
Found: Copper, Lead
What removes it: Reverse osmosis or Certified carbon block or RO.
Fluoride
Found: Fluoride
What removes it: Reverse osmosis.
Radium and uranium
Found: Radium (combined 226 + 228), Radium-226
What removes it: Reverse osmosis.
Salty taste / high TDS
Found: Total dissolved solids
What removes it: Reverse osmosis.
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