We read 21 results from Lake Ozark Pws’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 2,007 people · Water system ID MO3010441 · 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 5.8 to 5.8 · 2025 report, page 2 | 5.8 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Radium (combined 226 + 228)highest measured · range 1.4 to 1.4 · 2025 report, page 2 | 1.4 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Radium-226highest measured · range 1.4 to 1.4 · 2025 report, page 2 | 1.4 pCi/L | 0.05 pCi/L | 5 pCi/L | Above the health goal28x the health goal |
| Bariumhighest measured · range 0.14 to 0.23 · sampled 2024 · 2025 report, page 2 | 0.23 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 8.32 to 8.52 · sampled 2024 · 2025 report, page 3 | 8.52 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 |
| Fluoridehighest measured · range ND to 0.18 · sampled 2024 · 2025 report, page 2 | 0.18 ppm | 1 ppm | 4 ppm | Below the health goal |
| 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 ND to 0.0024 · sampled 2024 · 2025 report, page 3 | 0.0024 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)highest measured · range 0.05 to 0.2 · 2025 report, page 2 | 0.2 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHhighest measured · range 7.58 to 7.6 · sampled 2024 · 2025 report, page 3 | 7.6 | — | — | Normal range |
| Sulfatehighest measured · range 8.85 to 14.5 · sampled 2024 · 2025 report, page 3 | 14.5 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidshighest measured · range 331 to 345 · sampled 2024 · 2025 report, page 3 | 345 ppm | — | 500 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.0063 to 0.0067 · sampled 2024 · 2025 report, page 3 | 0.0067 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 312 to 330 · sampled 2024 · 2025 report, page 3 | 330 ppm | None set | None | No health limit |
| Calciumhighest measured · range 67.4 to 70.4 · sampled 2024 · 2025 report, page 3 | 70.4 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 19 to 20.8 · sampled 2024 · 2025 report, page 3 | 20.8 gpg (356 ppm) | — | — | Very hard |
| Magnesiumhighest measured · range 38.1 to 43.8 · sampled 2024 · 2025 report, page 3 | 43.8 ppm | None set | None | No health limit |
| Nickelhighest measured · range 2.51 to 2.82 · printed as 0.00282 MG/L · sampled 2024 · 2025 report, page 3 | 2.82 ppb | None set | None | No health limit |
| Potassiumhighest measured · range ND to 1.71 · sampled 2024 · 2025 report, page 3 | 1.71 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 4.09 to 7.89 · sampled 2024 · 2025 report, page 3 | 7.89 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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