We read 24 results from Troy Pws’s 2025 water quality report. No results over a legal limit; 7 above a health goal or guideline.
Serves about 12,500 people · Water system ID MO6010798 · Read the district’s 2025 report (opens in a new tab)
Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.
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 |
|---|---|---|---|---|
| Gross alpha (radioactivity)highest measured · range 7.6 to 10.6 · highest of 2 sources · 2025 report, page 2 | 10.6 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 · Customer taps · 2025 report, page 2 | 1.65 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal8.2x the health goal |
| Radium (combined 226 + 228)highest measured · range 2.8 to 4.8 · 2025 report, page 2 | 4.8 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Radium-226highest measured · range 2.8 to 3.4 · 2025 report, page 2 | 3.4 pCi/L | 0.05 pCi/L | 5 pCi/L | Above the health goal68x the health goal |
| Radium-228highest measured · range ND to 1.4 · 2025 report, page 2 | 1.4 pCi/L | 0.02 pCi/L | 5 pCi/L | Above the health goal74x the health goal |
| Total dissolved solidshighest measured · range 632 to 668 · 2025 report, page 3 | 668 ppm | — | 500 ppm guideline | Above the guideline1.3x the guideline (taste, odor or stains; not a health limit) |
| Uraniumhighest measured · range 0.9 to 0.9 · sampled 2023 · 2025 report, page 2 | 0.9 ppb | 0.6 ppb | 30 ppb | Above the health goal1.5x the health goal |
| Chloridehighest measured · range 105 to 110 · 2025 report, page 3 | 110 ppm | — | 250 ppm guideline | Within the guideline |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 0.13 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 1.53 to 1.53 · DBPDUAL-04 · 2025 report, page 2 | 2 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 23.9 to 23.9 · DBPDUAL-04, highest of 2 sources · 2025 report, page 2 | 24 ppb | None set | 80 ppb | Below the legal limit |
| Ironhighest measured · range 0.06 to 0.07 · 2025 report, page 3 | 0.07 ppm | — | 0.3 ppm guideline | Within the guideline |
| Manganesehighest measured · range 0.0029 to 0.0041 · 2025 report, page 3 | 0.0041 ppm | — | 0.05 ppm guideline | Within the guideline |
| pHhighest measured · range 7.56 to 7.88 · 2025 report, page 3 | 7.88 | — | — | Normal range |
| Sulfatehighest measured · range 94 to 137 · 2025 report, page 3 | 137 ppm | — | 250 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.01 to 0.03 · 2025 report, page 3 | 0.03 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 397 to 403 · 2025 report, page 3 | 403 ppm | None set | None | No health limit |
| Calciumhighest measured · range 53.5 to 76.7 · 2025 report, page 3 | 76.7 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 13.6 to 19.2 · 2025 report, page 3 | 19.2 gpg (328 ppm) | — | — | Very hard |
| Lithiumhighest measured · range 90.9 to 251 · sampled 2024 · highest of 2 sources · 2025 report, page 3 | 251 ppb | None set | None | No health limit |
| Magnesiumhighest measured · range 24.2 to 33.2 · 2025 report, page 3 | 33.2 ppm | None set | None | No health limit |
| Nickelhighest measured · range 2.8 to 4.65 · printed as 0.00465 MG/L · 2025 report, page 3 | 4.65 ppb | None set | None | No health limit |
| Potassiumhighest measured · range 7.2 to 10.7 · 2025 report, page 3 | 10.7 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 107 to 124 · 2025 report, page 3 | 124 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.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Troy Pws’s water between Mar 2024 and Sep 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium251 ppbFound in 10 of 10 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.
Radium and uranium
Found: Gross alpha (radioactivity), Radium (combined 226 + 228), Radium-226, Radium-228, Uranium
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
Salty taste / high TDS
Found: Total dissolved solids
What removes it: Reverse osmosis.
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