We read 17 results from Alton Pws’s 2025 water quality report. No results over a legal limit or above a health goal.
Serves about 1,000 people · Water system ID MO4010012 · 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 |
|---|---|---|---|---|
| Aluminumhighest measured · range 0.02 to 0.02 · sampled 2024 · 2025 report, page 3 | 0.02 ppm | — | 0.2 ppm guideline | Within the guideline |
| Bariumhighest measured · range 0.03 to 0.03 · sampled 2024 · 2025 report, page 2 | 0.03 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 5.42 to 5.42 · sampled 2024 · 2025 report, page 3 | 5.42 ppm | — | 250 ppm guideline | Within the guideline |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | 0.03 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Ironhighest measured · range 0.01 to 0.01 · sampled 2024 · 2025 report, page 3 | 0.01 ppm | — | 0.3 ppm guideline | Within the guideline |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)highest measured · range 0.08 to 0.08 · 2025 report, page 2 | 0.08 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHhighest measured · range 8.23 to 8.23 · sampled 2024 · 2025 report, page 3 | 8.23 | — | — | Normal range |
| Total dissolved solidshighest measured · range 275 to 275 · sampled 2024 · 2025 report, page 3 | 275 ppm | — | 500 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.06 to 0.06 · sampled 2024 · 2025 report, page 3 | 0.06 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 367 to 367 · sampled 2024 · 2025 report, page 3 | 367 ppm | None set | None | No health limit |
| Calciumhighest measured · range 58 to 58 · sampled 2024 · 2025 report, page 3 | 58 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 17.1 to 17.1 · sampled 2024 · 2025 report, page 3 | 17.1 gpg (293 ppm) | — | — | Very hard |
| Magnesiumhighest measured · range 35.9 to 35.9 · sampled 2024 · 2025 report, page 3 | 35.9 ppm | None set | None | No health limit |
| Nickelhighest measured · range 2.08 to 2.08 · printed as 0.00208 MG/L · sampled 2024 · 2025 report, page 3 | 2.08 ppb | None set | None | No health limit |
| Potassiumhighest measured · range 1.23 to 1.23 · sampled 2024 · 2025 report, page 3 | 1.23 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 5.29 to 5.29 · sampled 2024 · 2025 report, page 3 | 5.29 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.
What you can do
Nothing in this report is above a health goal or legal limit. If you’re bothered by taste, smell, hardness or spots, or your home has older pipes, the filter catalog and buyer questions can help you pick, and a test of your own tap shows what your plumbing adds.
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