We read 12 results from Winona’s 2024 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 27,782 people · Water system ID MN1850013 · Read the district’s 2024 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 2024 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 30 homes tested, 0 over the action level · listed as a violation in the report · sampled 2022 · Customer taps · 2024 report, page 2 | 1.75 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal8.8x the health goal |
| Radium (combined 226 + 228)as reported · range ND to 3.5 · listed as a violation in the report · Drinking water · 2024 report, page 2 | 3.5 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Bariumas reported · listed as a violation in the report · sampled 2023 · Drinking water · 2024 report, page 2 | 0.06 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorineas reported · range 0.53 to 0.76 · listed as a violation in the report · Distribution system · 2024 report, page 2 | 0.65 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 30 homes tested, 0 over the action level · listed as a violation in the report · sampled 2022 · Customer taps · 2024 report, page 2 | 0.12 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)as reported · range ND to 4.1 · listed as a violation in the report · Distribution system · 2024 report, page 2 | 4.1 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)as reported · range 3.3 to 43.1 · listed as a violation in the report · Distribution system · 2024 report, page 2 | 43.1 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideas reported · range 0.63 to 0.7 · listed as a violation in the report · Drinking water · 2024 report, page 2 | 0.67 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)as reported · range ND to 0.08 · listed as a violation in the report · Drinking water · 2024 report, page 2 | 0.08 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfateas reported · range 31.5 to 37.3 · sampled 2023 · Drinking water · 2024 report, page 3 | 37.3 ppm | — | 250 ppm guideline | Within the guideline |
| Lithiumas reported · range ND to 43.5 · Drinking water · 2024 report, page 3 | 43.5 ppb | None set | None | No health limit |
| Sodiumas reported · range 2.47 to 137 · sampled 2023 · Drinking water · 2024 report, page 3 | 137 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.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Winona’s water between Nov 2023 and Jul 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium50.1 ppbFound in 4 of 6 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.
Radium and uranium
Found: Radium (combined 226 + 228)
What removes it: Reverse osmosis.
More districts: Minnesota water quality · All states · Something look wrong? Tell us