We read 22 results from Windsor Pws’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 2,900 people · Water system ID MO1010865 · 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 |
|---|---|---|---|---|
| Gross alpha (radioactivity)highest measured · range 3.3 to 3.3 · 2025 report, page 2 | 3.3 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Radium (combined 226 + 228)highest measured · range 1 to 1 · 2025 report, page 2 | 1 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Radium-226highest measured · range 1 to 1 · 2025 report, page 2 | 1 pCi/L | 0.05 pCi/L | 5 pCi/L | Above the health goal20x the health goal |
| 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 9.27 to 9.27 · sampled 2023 · 2025 report, page 3 | 9.27 ppm | — | 250 ppm guideline | Within the guideline |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 0.11 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (TTHM)highest running annual average · range 4.85 to 4.85 · DBPDUAL-01, highest of 2 sources · 2025 report, page 2 | 5 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.62 to 0.62 · sampled 2023 · 2025 report, page 2 | 0.62 ppm | 1 ppm | 4 ppm | Below the health goal |
| Ironhighest measured · range 0.05 to 0.05 · sampled 2023 · 2025 report, page 3 | 0.05 ppm | — | 0.3 ppm guideline | Within the guideline |
| Lead90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Manganesehighest measured · range 0.0068 to 0.0068 · sampled 2023 · 2025 report, page 3 | 0.0068 ppm | — | 0.05 ppm guideline | Within the guideline |
| pHhighest measured · range 7.66 to 7.66 · sampled 2023 · 2025 report, page 3 | 7.66 | — | — | Normal range |
| Sulfatehighest measured · range 66.1 to 66.1 · sampled 2023 · 2025 report, page 3 | 66.1 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidshighest measured · range 374 to 374 · sampled 2023 · 2025 report, page 3 | 374 ppm | — | 500 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.04 to 0.04 · sampled 2023 · 2025 report, page 3 | 0.04 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 301 to 301 · sampled 2023 · 2025 report, page 3 | 301 ppm | None set | None | No health limit |
| Calciumhighest measured · range 73.4 to 73.4 · sampled 2023 · 2025 report, page 3 | 73.4 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 18.3 to 18.3 · sampled 2023 · 2025 report, page 3 | 18.3 gpg (313 ppm) | — | — | Very hard |
| Magnesiumhighest measured · range 31.5 to 31.5 · sampled 2023 · 2025 report, page 3 | 31.5 ppm | None set | None | No health limit |
| Nickelhighest measured · range 3.03 to 3.03 · printed as 0.00303 MG/L · sampled 2023 · 2025 report, page 3 | 3.03 ppb | None set | None | No health limit |
| Potassiumhighest measured · range 4.14 to 4.14 · sampled 2023 · 2025 report, page 3 | 4.14 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 26.1 to 26.1 · sampled 2023 · 2025 report, page 3 | 26.1 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.
Radium and uranium
Found: Gross alpha (radioactivity), Radium (combined 226 + 228), Radium-226
What removes it: Reverse osmosis.
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