Tap Water Quality Report
Tap water quality in Flint, Michigan
Tap water in Flint, Michigan receives a grade of B (81/100) from TapWaterSafety.org. It's served by 2 public water systems, primarily FLINT, CITY OF. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; PFAS contamination; Arsenic detected. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in Flint's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utilities serving Flint.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 25.3 ppb, 422x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 26.7 ppb, 178x above the EWG health guideline of 0.15 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 15.4 ppb, 154x above the EWG health guideline of 0.1 ppb.
PFAS contamination
Severe concernPerfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Arsenic detected
Moderate concernArsenic detected at 0.18 ppb.
EPA compliance record
Official U.S. EPA records for FLINT, CITY OF (system ID MI0002310) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Lead and Copper Rule Revisions | Required treatment not met | 10/17/2024 | Open |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Water systems serving Flint
Flint is served by 2 public water systems. Click any utility to see its complete grade card and treatment plant contact info.
FLINT, CITY OF
- Haloacetic acids (HAA9) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
- Haloacetic acids (HAA5) significantly above health guideline
GENESEE COUNTY WATER SYSTEM
- PFAS contamination
- Haloacetic acids (HAA9) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
Recommended filters for Flint
Filters matched to the specific contaminants in Flint's water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in Flint's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
25.3 ppb | 0.06 | — | — | — | — | — | 422× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
38.1 ppb | 0.15 | 80.0 | 100 | — | — | — | 254× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
15.4 ppb | 0.1 | 60.0 | 60 | — | — | — | 154× over |
| Arsenic Heavy metal |
0.18 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 45× over |
| Chromium (hexavalent) Heavy metal |
0.236 ppb | 0.02 | — | — | — | — | — | 12× over |
| Radium, combined (-226 and -228) Radiological |
0.59 pCi/L | 0.05 | 5.0 | — | — | — | — | 12× over |
| Nitrate Inorganic |
0.167 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 1.2× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.08 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | Below guideline |
| Manganese Heavy metal |
4.92 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Barium Heavy metal |
13.3 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Molybdenum Other |
0.671 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
9.0 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.125 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.108 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| 4-Androstene-3,17-dione Other |
0.205 ppt | — | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.64 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from FLINT, CITY OF.