St. Louis Water Quality Report
18 cities ranked · Average grade: A- · Minnesota
Avg Score
87.4
Cities Ranked
18
Health Violations
9
PFAS Detected
1
87.4
County avg score
18
Cities ranked
94%
A or B grade
0%
D or F grade
9
Health violations
1
PFAS detected
Grade Distribution
How St. Louis cities scored
A
16
89%
Excellent
B
1
6%
Good
C
1
6%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Minnesota average
▼ 0.1 pts below state average
City Map
Water quality across St. Louis
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in St. Louis
Worst cities
County context
99.9%
of residents on fluoridated water (CDC, 2020)
Full Rankings
All 18 cities in St. Louis
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Floodwood | A+ | 99.3 | 501 | 5 | Health | |
| 2 | Hermantown | A+ | 98.5 | 7K | 0 | Zero violations | |
| 3 | Mountain Iron | A | 93.8 | 3K | 5 | Unresolved | |
| 4 | Hoyt Lakes | A | 90.4 | 2K | 3 | Unresolved | |
| 5 | Cook | A | 90.4 | 574 | 5 | Health Unresolved | |
| 6 | Biwabik | A- | 89.8 | 975 | 4 | Health Unresolved | |
| 7 | Aurora | A- | 89.5 | 3K | 7 | Unresolved | |
| 8 | Virginia | A- | 88.7 | 8K | 1 | Unresolved | |
| 9 | Duluth | A- | 88.6 | 88K | 4 | Health Unresolved | |
| 10 | Buhl | A- | 88.1 | 1K | 6 | Health Unresolved | |
| 11 | Proctor | A- | 87 | 3K | 3 | Unresolved | |
| 12 | Chisholm | A- | 86.7 | 5K | 1 | Unresolved | |
| 13 | Gilbert | A- | 86.6 | 2K | 3 | Unresolved | |
| 14 | Tower | A- | 86.5 | 872 | 11 | Health Unresolved | |
| 15 | Eveleth | A- | 86.1 | 4K | 16 | Health Unresolved | |
| 16 | Babbitt | A- | 85.7 | 1K | 3 | Unresolved | |
| 17 | Ely | B- | 74.8 | 3K | 8 | Health Unresolved | |
| 18 | Hibbing | C | 62.9 | 16K | 11 | Health Lead Unresolved |