We read 14 results from Mo American Jefferson City District’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 30,075 people · Water system ID MO3010409 · 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 |
|---|---|---|---|---|
| Lead90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 2 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal10x the health goal |
| Chloridehighest measured · range 30.7 to 30.7 · 2025 report, page 3 | 30.7 ppm | — | 250 ppm guideline | Within the guideline |
| Copper90th percentile of homes tested, 0 over the action level · 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 11.3 to 31.5 · DBPDUAL-01, highest of 4 sources · 2025 report, page 2 | 24 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 24.2 to 83 · DBPDUAL-01, highest of 4 sources · 2025 report, page 2 | 55 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.59 to 0.59 · 2025 report, page 2 | 0.59 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · range 1.7 to 1.7 · 2025 report, page 2 | 1.7 ppm | 10 ppm | 10 ppm | Below the health goal |
| Seleniumhighest measured · range 2 to 2 · 2025 report, page 2 | 2 ppb | 30 ppb | 50 ppb | Below the health goal |
| Sulfatehighest measured · range 154 to 154 · 2025 report, page 3 | 154 ppm | — | 250 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 148 to 226 · 2025 report, page 3 | 226 ppm | None set | None | No health limit |
| Calciumhighest measured · range 28 to 28 · 2025 report, page 3 | 28 ppm | None set | None | No health limit |
| Lithiumhighest measured · range 26.2 to 92.7 · sampled 2024 · highest of 2 sources · 2025 report, page 3 | 92.7 ppb | None set | None | No health limit |
| Magnesiumhighest measured · range 16 to 16 · 2025 report, page 3 | 16 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 60.4 to 60.4 · 2025 report, page 3 | 60.4 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 Mo American Jefferson City District’s water between Feb 2024 and Nov 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium92.7 ppbFound in 4 of 4 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.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
More districts: Missouri water quality · All states · Something look wrong? Tell us