We read 15 results from Marston Pws’s 2025 water quality report. No results over a legal limit or above a health goal.
Serves about 503 people · Water system ID MO4010504 · 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 |
|---|---|---|---|---|
| Chloridehighest measured · range 18.1 to 18.1 · sampled 2024 · 2025 report, page 3 | 18.1 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 | 0.04 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 3.7 to 3.7 · DBPDUAL-01 · 2025 report, page 2 | 4 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 25.7 to 25.7 · DBPDUAL-01 · 2025 report, page 2 | 26 ppb | None set | 80 ppb | Below the legal limit |
| Ironhighest measured · range 0.13 to 0.13 · sampled 2024 · 2025 report, page 3 | 0.13 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 |
| pHhighest measured · range 7.07 to 7.07 · sampled 2024 · 2025 report, page 3 | 7.07 | — | — | Normal range |
| Sulfatehighest measured · range 14.8 to 14.8 · sampled 2024 · 2025 report, page 3 | 14.8 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidshighest measured · range 261 to 261 · sampled 2024 · 2025 report, page 3 | 261 ppm | — | 500 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 180 to 180 · sampled 2024 · 2025 report, page 3 | 180 ppm | None set | None | No health limit |
| Calciumhighest measured · range 62.6 to 62.6 · sampled 2024 · 2025 report, page 3 | 62.6 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 12.3 to 12.3 · sampled 2024 · 2025 report, page 3 | 12.3 gpg (210 ppm) | — | — | Very hard |
| Magnesiumhighest measured · range 13.1 to 13.1 · sampled 2024 · 2025 report, page 3 | 13.1 ppm | None set | None | No health limit |
| Potassiumhighest measured · range 1.67 to 1.67 · sampled 2024 · 2025 report, page 3 | 1.67 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 11.8 to 11.8 · sampled 2024 · 2025 report, page 3 | 11.8 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. 4 numbers we weren’t sure about are held back until a person checks.
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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