We read 12 results from Otsego’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 19,000 people · Water system ID MN1860026 · 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 |
|---|---|---|---|---|
| Copper90th percentile of 30 homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 0.47 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1.6x the health goal |
| Lead90th percentile of 30 homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 0.99 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal4.9x the health goal |
| Manganesehighest measured · range 0.05 to 0.71 · printed as 698 ppb · sampled 2021 · 2025 report, page 4 | 0.7 ppm | — | 0.05 ppm guideline | Above the guideline14x the guideline (taste, odor or stains; not a health limit) |
| Uraniumhighest measured · range 2 to 5.3 · sampled 2023 · 2025 report, page 3 | 5.3 ppb | 0.6 ppb | 30 ppb | Above the health goal8.8x the health goal |
| Bariumhighest measured · range 0.03 to 0.05 · 2025 report, page 3 | 0.05 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloraminehighest running annual average · range 0.19 to 0.7 · 2025 report, page 3 | 0.77 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 5.7 · 2025 report, page 3 | 5.7 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 3 to 8.6 · 2025 report, page 3 | 8.6 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest running annual average · range 0.4 to 0.72 · 2025 report, page 3 | 0.64 ppm | 1 ppm | 4 ppm | Below the health goal |
| Sulfatehighest measured · range 3.87 to 10.6 · 2025 report, page 4 | 10.6 ppm | — | 250 ppm guideline | Within the guideline |
| PFBA (a PFAS)highest running annual average · range ND to 0.48 · 2025 report, page 4 | 0.24 ppt | None set | None | No health limit |
| Sodiumhighest measured · range 2.62 to 7.94 · 2025 report, page 4 | 7.94 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.
Lead
Found: Copper, Lead
What removes it: Reverse osmosis or Certified carbon block or RO.
Sediment or cloudy water
Found: Manganese
What removes it: Oxidation filter.
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