We read 18 results from Rosemount’s 2025 water quality report. No results over a legal limit; 5 above a health goal or guideline.
Serves about 26,500 people · Water system ID MN1190019 · 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 |
|---|---|---|---|---|
| Manganeseas reported · range 0.08 to 0.11 · printed as 108 ppb · sampled 2021 · Drinking water · 2025 report, page 8 | 0.11 ppm | — | 0.05 ppm guideline | Above the guideline2.2x the guideline (taste, odor or stains; not a health limit) |
| PFOA (a PFAS)as reported · range ND to 4.9 · Drinking water · 2025 report, page 6 | 4.4 ppt | 0.007 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20291.1x the 4 ppt federal limit that takes effect in 2029Not a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029. |
| PFOS (a PFAS)as reported · range ND to 5.2 · Drinking water · 2025 report, page 6 | 5 ppt | 1 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20291.3x the 4 ppt federal limit that takes effect in 2029Not a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029. |
| Radium (combined 226 + 228)highest running annual average · range 1.4 to 5.8 · listed as a violation in the report · Drinking water · 2025 report, page 4 | 4.9 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Uraniumas reported · range ND to 4.2 · listed as a violation in the report · Drinking water · 2025 report, page 4 | 4.1 ppb | 0.6 ppb | 30 ppb | Above the health goal6.8x the health goal |
| Bariumas reported · listed as a violation in the report · Drinking water · 2025 report, page 4 | 0.08 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorineas reported · range 0.06 to 0.21 · listed as a violation in the report · Distribution system · 2025 report, page 5 | 0.14 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)as reported · range ND to 7.9 · listed as a violation in the report · Distribution system · 2025 report, page 5 | 7.9 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)as reported · range ND to 26.6 · listed as a violation in the report · Distribution system · 2025 report, page 5 | 26.6 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideas reported · range 0.62 to 0.95 · listed as a violation in the report · Drinking water · 2025 report, page 6 | 0.84 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · range ND to 5.1 · listed as a violation in the report · Drinking water · 2025 report, page 4 | 5.1 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)as reported · range ND to 3.5 · Drinking water · 2025 report, page 8 | 3.5 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| Sulfateas reported · Drinking water · 2025 report, page 8 | 18.1 ppm | — | 250 ppm guideline | Within the guideline |
| Nickelas reported · range ND to 10.9 · sampled 2024 · Drinking water · 2025 report, page 8 | 10.9 ppb | None set | None | No health limit |
| PFBA (a PFAS)as reported · range 1.7 to 72 · Drinking water · 2025 report, page 8 | 68 ppt | None set | None | No health limit |
| PFBS (a PFAS)as reported · range ND to 4 · Drinking water · 2025 report, page 8 | 4 ppt | None set | None | No health limit |
| PFPeA (a PFAS)as reported · range ND to 3.7 · Drinking water · 2025 report, page 8 | 3.5 ppt | None set | None | No health limit |
| Sodiumas reported · Drinking water · 2025 report, page 8 | 5.04 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. 3 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.
Sediment or cloudy water
Found: Manganese
What removes it: Oxidation filter.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS)
What removes it: Reverse osmosis.
Radium and uranium
Found: Radium (combined 226 + 228), Uranium
What removes it: Reverse osmosis.
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