Michigan
Water Quality Report
90 Excellent
Average Score
90/100
Water Systems
584
Population
7.4M
Violations
7 1 unresolved
Score Distribution
2 A
3 B
1 C
0 D
1 F
Top Contaminant Violations
| Contaminant | Violations |
|---|---|
| Radium-228 | 1 |
| Manganese | 1 |
| Mercury | 1 |
| Total Trihalomethanes | 1 |
| PFAS (Per- and Polyfluoroalkyl Substances) | 1 |
Lowest Scoring Water Systems
29
Ann Arbor Water Treatment F
MI8110001 Ann Arbor, MI 123,851 served
57
City of Flint Water System C
MI2510001 Flint, MI 95,943 served
81
Lansing Board of Water and Light B
MI3310001 Lansing, MI 112,644 served
89
Great Lakes Water Authority (Detroit) B
MI8210001 Detroit, MI 639,111 served
89
Karegnondi Water Authority (Flint area) B
MI2510002 Flint, MI 60,000 served
Counties in Michigan
Cities in Michigan
View all 400 cities →Popular City Comparisons in Michigan
Quickly compare major cities in Michigan by water quality score and grade.
Frequently Asked Questions
Is tap water in Michigan safe to drink?
Michigan has an average WaterQ score of 90/100 across 584 public water systems. Safety can vary by city and system, so check your local report for recent violations and contaminants.
How many water systems are in Michigan?
WaterQ currently tracks 584 public water systems in Michigan.
Where can I compare cities in Michigan?
Use the city list below to open detailed reports, or visit the compare tool to benchmark two cities side-by-side on score, grade, and system coverage.