We read 16 results from Jefferson County Pwsd 12’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 3,000 people · Water system ID MO6024304 · 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 |
|---|---|---|---|---|
| Ironhighest measured · range ND to 0.49 · sampled 2023 · 2025 report, page 3 | 0.49 ppm | — | 0.3 ppm guideline | Above the guideline1.6x the guideline (taste, odor or stains; not a health limit) |
| Bariumhighest measured · range 0.12 to 0.23 · sampled 2023 · 2025 report, page 2 | 0.23 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range ND to 9.88 · sampled 2023 · 2025 report, page 3 | 9.88 ppm | — | 250 ppm guideline | Within the guideline |
| Manganesehighest measured · range ND to 0.0092 · sampled 2023 · 2025 report, page 3 | 0.0092 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)highest measured · range ND to 0.34 · 2025 report, page 2 | 0.34 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHhighest measured · range 7.55 to 7.98 · sampled 2023 · 2025 report, page 3 | 7.98 | — | — | Normal range |
| Sulfatehighest measured · range 20.3 to 20.8 · sampled 2023 · 2025 report, page 3 | 20.8 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidshighest measured · range 266 to 378 · sampled 2023 · 2025 report, page 3 | 378 ppm | — | 500 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.0065 to 0.03 · sampled 2023 · 2025 report, page 3 | 0.03 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 343 to 397 · sampled 2023 · 2025 report, page 3 | 397 ppm | None set | None | No health limit |
| Calciumhighest measured · range 52.9 to 73.3 · sampled 2023 · 2025 report, page 3 | 73.3 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 15.6 to 20.7 · sampled 2023 · 2025 report, page 3 | 20.7 gpg (354 ppm) | — | — | Very hard |
| Magnesiumhighest measured · range 32.4 to 41.6 · sampled 2023 · 2025 report, page 3 | 41.6 ppm | None set | None | No health limit |
| Nickelhighest measured · range 1.94 to 3.05 · printed as 0.00305 MG/L · sampled 2023 · 2025 report, page 3 | 3.05 ppb | None set | None | No health limit |
| Potassiumhighest measured · range 1 to 1.15 · sampled 2023 · 2025 report, page 3 | 1.15 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 1.82 to 6.54 · sampled 2023 · 2025 report, page 3 | 6.54 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. 2 numbers we weren’t sure about are 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.
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