We read 15 results from Niangua Pws’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 411 people · Water system ID MO5010575 · 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 2024 · Customer taps · 2025 report, page 2 | 0.3 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1x the health goal |
| Gross alpha (radioactivity)highest measured · range 3 to 3 · sampled 2023 · 2025 report, page 2 | 3 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 · sampled 2024 · Customer taps · 2025 report, page 2 | 1.1 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal5.5x the health goal |
| Bariumhighest measured · range 0.02 to 0.02 · 2025 report, page 2 | 0.02 ppm | 2 ppm | 2 ppm | Below the health goal |
| Ironhighest measured · range 0.15 to 0.15 · 2025 report, page 3 | 0.15 ppm | — | 0.3 ppm guideline | Within the guideline |
| pHhighest measured · range 8.17 to 8.17 · 2025 report, page 3 | 8.17 | — | — | Normal range |
| Sulfatehighest measured · range 10.3 to 10.3 · 2025 report, page 3 | 10.3 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidshighest measured · range 192 to 192 · 2025 report, page 3 | 192 ppm | — | 500 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.02 to 0.02 · 2025 report, page 3 | 0.02 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 306 to 306 · 2025 report, page 3 | 306 ppm | None set | None | No health limit |
| Calciumhighest measured · range 45.4 to 45.4 · 2025 report, page 3 | 45.4 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 12.5 to 12.5 · 2025 report, page 3 | 12.5 gpg (214 ppm) | — | — | Very hard |
| Magnesiumhighest measured · range 24.4 to 24.4 · 2025 report, page 3 | 24.4 ppm | None set | None | No health limit |
| Nickelhighest measured · range 1.13 to 1.13 · printed as 0.00113 MG/L · 2025 report, page 3 | 1.13 ppb | None set | None | No health limit |
| Sodiumhighest measured · range 3.13 to 3.13 · 2025 report, page 3 | 3.13 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.
Radium and uranium
Found: Gross alpha (radioactivity)
What removes it: Reverse osmosis.
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