We read 24 results from Osborn Pws’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 405 people · Water system ID MO1010609 · 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 6.9 to 6.9 · sampled 2021 · 2025 report, page 2 | 6.9 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 2.65 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal13x the health goal |
| Aluminumhighest measured · range 0.01 to 0.01 · sampled 2023 · Purchased water (wholesaler) · 2025 report, page 3 | 0.01 ppm | — | 0.2 ppm guideline | Within the guideline |
| Bariumhighest measured · range 0.07 to 0.07 · sampled 2023 · 2025 report, page 2 | 0.07 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 25.9 to 25.9 · sampled 2023 · highest of 2 sources · 2025 report, page 3 | 25.9 ppm | — | 250 ppm guideline | Within the guideline |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 0.09 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 11 to 11 · DBPDUAL-01 · 2025 report, page 2 | 11 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 11.5 to 11.5 · DBPDUAL-01 · 2025 report, page 2 | 12 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.5 to 0.5 · sampled 2023 · 2025 report, page 2 | 0.5 ppm | 1 ppm | 4 ppm | Below the health goal |
| Manganesehighest measured · range 0.02 to 0.02 · sampled 2023 · 2025 report, page 3 | 0.02 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)highest measured · range 0.13 to 0.48 · 2025 report, page 2 | 0.48 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHhighest measured · range 7.34 to 7.34 · sampled 2023 · 2025 report, page 3 | 7.34 | — | — | Normal range |
| Seleniumhighest measured · range 5.42 to 5.42 · sampled 2023 · 2025 report, page 2 | 5.42 ppb | 30 ppb | 50 ppb | Below the health goal |
| Sulfatehighest measured · range 136 to 136 · sampled 2023 · Purchased water (wholesaler), highest of 2 sources · 2025 report, page 3 | 136 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidshighest measured · range 453 to 453 · sampled 2023 · 2025 report, page 3 | 453 ppm | — | 500 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.21 to 0.21 · sampled 2023 · 2025 report, page 3 | 0.21 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 356 to 356 · sampled 2023 · 2025 report, page 3 | 356 ppm | None set | None | No health limit |
| Calciumhighest measured · range 81.3 to 81.3 · sampled 2023 · highest of 2 sources · 2025 report, page 3 | 81.3 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 18.6 to 18.6 · sampled 2023 · 2025 report, page 3 | 18.6 gpg (318 ppm) | — | — | Very hard |
| Lithiumhighest measured · range 84.3 to 114 · sampled 2024 · Purchased water (wholesaler) · 2025 report, page 3 | 114 ppb | None set | None | No health limit |
| Magnesiumhighest measured · range 28 to 28 · sampled 2023 · highest of 2 sources · 2025 report, page 3 | 28 ppm | None set | None | No health limit |
| Nickelhighest measured · range 2.66 to 2.66 · printed as 0.00266 MG/L · sampled 2023 · 2025 report, page 3 | 2.66 ppb | None set | None | No health limit |
| Silicahighest measured · range 17 to 17 · sampled 2023 · Purchased water (wholesaler) · 2025 report, page 3 | 17 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 56 to 56 · sampled 2023 · Purchased water (wholesaler), highest of 2 sources · 2025 report, page 3 | 56 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. 8 numbers we weren’t sure about are 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)
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
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