We read 14 results from Union Star Pws’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 386 people · Water system ID MO1010802 · 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 |
|---|---|---|---|---|
| Lead90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 2 | 1.16 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal5.8x the health goal |
| Aluminumhighest measured · range 0.01 to 0.01 · sampled 2023 · Purchased water (wholesaler) · 2025 report, page 3 | 0.01 ppm | — | 0.2 ppm guideline | Within the guideline |
| Chloridehighest measured · range 24.8 to 24.8 · sampled 2023 · Purchased water (wholesaler) · 2025 report, page 3 | 24.8 ppm | — | 250 ppm guideline | Within the guideline |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2023 · 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 10.2 to 10.2 · Purchased water: Distribution system, highest of 2 sources · 2025 report, page 3 | 10 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 11.1 to 11.1 · Purchased water: Distribution system, highest of 2 sources · 2025 report, page 3 | 11 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.7 to 0.7 · sampled 2023 · Purchased water (wholesaler) · 2025 report, page 2 | 0.7 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · range 0.32 to 0.32 · Purchased water (wholesaler) · 2025 report, page 2 | 0.32 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfatehighest measured · range 136 to 136 · sampled 2023 · Purchased water (wholesaler) · 2025 report, page 3 | 136 ppm | — | 250 ppm guideline | Within the guideline |
| Calciumhighest measured · range 37 to 37 · sampled 2023 · Purchased water (wholesaler) · 2025 report, page 3 | 37 ppm | None set | None | No health limit |
| Lithiumhighest measured · range 84.3 to 114 · sampled 2024 · Purchased water (wholesaler) · 2025 report, page 3 | 114 ppb | None set | None | No health limit |
| Magnesiumhighest measured · range 27 to 27 · sampled 2023 · Purchased water (wholesaler) · 2025 report, page 3 | 27 ppm | None set | None | No health limit |
| Silicahighest measured · range 17 to 17 · sampled 2023 · Purchased water (wholesaler) · 2025 report, page 3 | 17 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 56 to 56 · sampled 2023 · Purchased water (wholesaler) · 2025 report, page 3 | 56 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: Lead
What removes it: Certified carbon block or RO.
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