We read 12 results from City of Flint’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 81,252 people · Water system ID MI0002310 · 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, 2 over the action level · listed as a violation in the report · Customer taps (Jul-Dec 2025), highest of 2 sources · 2025 report, page 7 | 6 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal30x the health goal |
| Arsenichighest measured · range ND to 0.54 · listed as a violation in the report · sampled 2024 · GCDC Lake Huron plant · 2025 report, page 5 | Not detected | 0.004 ppb | 10 ppb | Not detected |
| Bariumhighest measured · range 0.01 to 0.01 · listed as a violation in the report · sampled 2024 · GCDC Lake Huron plant · 2025 report, page 5 | 0.01 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest running annual average · range 0.5 to 1.8 · listed as a violation in the report · Flint distribution system, highest of 3 sources · 2025 report, page 6 | 1.24 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · listed as a violation in the report · Customer taps (Jan-Jun 2025), highest of 2 sources · 2025 report, page 7 | 0.1 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 9 to 32 · listed as a violation in the report · Flint distribution system · 2025 report, page 6 | 17.9 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 12.6 to 57.3 · listed as a violation in the report · Flint distribution system · 2025 report, page 6 | 30.5 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.18 to 0.87 · listed as a violation in the report · GCDC Lake Huron plant, highest of 2 sources · 2025 report, page 5 | 0.87 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)single sample · listed as a violation in the report · GLWA Lake Huron plant · 2025 report, page 5 | 0.33 ppm | 10 ppm | 10 ppm | Below the health goal |
| Seleniumsingle sample · listed as a violation in the report · sampled 2024 · GCDC Lake Huron plant · 2025 report, page 5 | 1 ppb | 30 ppb | 50 ppb | Below the health goal |
| Turbidity (cloudiness)highest measured · listed as a violation in the report · GLWA Lake Huron plant, highest of 2 sources · 2025 report, page 5 | 0.14 NTU | None set | 1 NTU | Below the legal limit |
| Sodiumaverage · GCDC Lake Huron plant, highest of 2 sources · 2025 report, page 6 | 7.4 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.
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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