We read 21 results from Mound City Pws’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 1,159 people · Water system ID MO1010548 · 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 |
|---|---|---|---|---|
| Antimonyhighest measured · range 1.61 to 1.61 · sampled 2023 · 2025 report, page 2 | 1.61 ppb | 1 ppb | 6 ppb | Above the health goal1.6x the health goal |
| Arsenichighest measured · range 1.13 to 1.13 · sampled 2023 · 2025 report, page 2 | 1.13 ppb | 0.004 ppb | 10 ppb | Above the health goal282x the health goal |
| pHhighest measured · range 8.66 to 8.66 · sampled 2023 · 2025 report, page 3 | 8.66 | — | — | Outside the normal rangeAlkaline water can leave scale |
| Bariumhighest measured · range 0.08 to 0.08 · sampled 2023 · 2025 report, page 2 | 0.08 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 63.3 to 63.3 · sampled 2023 · 2025 report, page 3 | 63.3 ppm | — | 250 ppm guideline | Within the guideline |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 0.0031 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 2.31 to 2.31 · DBPDUAL-01 · 2025 report, page 2 | 2 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 36.2 to 36.2 · DBPDUAL-01 · 2025 report, page 2 | 36 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.13 to 0.13 · sampled 2023 · 2025 report, page 2 | 0.13 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 |
| Nitrate (as N)highest measured · range 0.06 to 0.06 · 2025 report, page 2 | 0.06 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfatehighest measured · range 64.2 to 64.2 · sampled 2023 · 2025 report, page 3 | 64.2 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidshighest measured · range 314 to 314 · sampled 2023 · 2025 report, page 3 | 314 ppm | — | 500 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 224 to 224 · sampled 2023 · 2025 report, page 3 | 224 ppm | None set | None | No health limit |
| Calciumhighest measured · range 33.3 to 33.3 · sampled 2023 · 2025 report, page 3 | 33.3 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 12.8 to 12.8 · sampled 2023 · 2025 report, page 3 | 12.8 gpg (219 ppm) | — | — | Very hard |
| Lithiumhighest measured · range 10.2 to 10.2 · 2025 report, page 3 | 10.2 ppb | None set | None | No health limit |
| Magnesiumhighest measured · range 32.9 to 32.9 · sampled 2023 · 2025 report, page 3 | 32.9 ppm | None set | None | No health limit |
| Nickelhighest measured · range 1.61 to 1.61 · printed as 0.00161 MG/L · sampled 2023 · 2025 report, page 3 | 1.61 ppb | None set | None | No health limit |
| Potassiumhighest measured · range 2.46 to 2.46 · sampled 2023 · 2025 report, page 3 | 2.46 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 27.5 to 27.5 · sampled 2023 · 2025 report, page 3 | 27.5 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.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Mound City Pws’s water between Feb 2025 and Aug 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium10.7 ppbFound in 2 of 2 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)
Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.
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.
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