We read 8 results from Marquette’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 20,629 people · Water system ID MI0004120 · 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 |
|---|---|---|---|---|
| Gross alpha (radioactivity)as reported · sampled 2024 · Treated water (Lake Superior) · 2025 report, page 3 | 0.09 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Radium (combined 226 + 228)as reported · sampled 2024 · Treated water (Lake Superior) · 2025 report, page 3 | 0.4 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Chlorinehighest running annual average · range 0.22 to 0.99 · Distribution system · 2025 report, page 3 | 0.67 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 4 | 0.2 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (TTHM)highest running annual average · range 12.1 to 26.7 · Distribution system · 2025 report, page 3 | 20.4 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideas reported · range 0.61 to 0.92 · Treated water (Lake Superior) · 2025 report, page 3 | 0.76 ppm | 1 ppm | 4 ppm | Below the health goal |
| Uraniumas reported · sampled 2024 · Treated water (Lake Superior) · 2025 report, page 3 | 0.07 ppb | 0.6 ppb | 30 ppb | Below the health goal |
| Sodiumas reported · Treated water (Lake Superior) · 2025 report, page 3 | 8 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.
Radium and uranium
Found: Gross alpha (radioactivity), Radium (combined 226 + 228)
What removes it: Reverse osmosis.
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