We read 16 results from Johnson Bay Subdivision’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 126 people · Water system ID MO3031338 · 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 2024 · Customer taps · 2025 report, page 2 | 2.5 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal13x the health goal |
| Bariumhighest measured · range 0.36 to 0.36 · sampled 2024 · 2025 report, page 2 | 0.36 ppm | 2 ppm | 2 ppm | Below the health goal |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | 0.07 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Ironhighest measured · range 0.21 to 0.21 · sampled 2024 · 2025 report, page 3 | 0.21 ppm | — | 0.3 ppm guideline | Within the guideline |
| Manganesehighest measured · range 0.0037 to 0.0037 · sampled 2024 · 2025 report, page 3 | 0.0037 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)highest measured · range 0.01 to 0.01 · 2025 report, page 2 | 0.01 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHhighest measured · range 7.72 to 7.72 · sampled 2024 · 2025 report, page 3 | 7.72 | — | — | Normal range |
| Sulfatehighest measured · range 9.04 to 9.04 · sampled 2024 · 2025 report, page 3 | 9.04 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidshighest measured · range 281 to 281 · sampled 2024 · 2025 report, page 3 | 281 ppm | — | 500 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.23 to 0.23 · sampled 2024 · 2025 report, page 3 | 0.23 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 289 to 289 · sampled 2024 · 2025 report, page 3 | 289 ppm | None set | None | No health limit |
| Calciumhighest measured · range 59.1 to 59.1 · sampled 2024 · 2025 report, page 3 | 59.1 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 16.6 to 16.6 · sampled 2024 · 2025 report, page 3 | 16.6 gpg (284 ppm) | — | — | Very hard |
| Magnesiumhighest measured · range 33.2 to 33.2 · sampled 2024 · 2025 report, page 3 | 33.2 ppm | None set | None | No health limit |
| Nickelhighest measured · range 2.06 to 2.06 · printed as 0.00206 MG/L · sampled 2024 · 2025 report, page 3 | 2.06 ppb | None set | None | No health limit |
| Sodiumhighest measured · range 2.43 to 2.43 · sampled 2024 · 2025 report, page 3 | 2.43 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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