Minnesota ZIP Code Water Quality
11 ZIP codes with water quality data · State average grade: A-
ZIP Codes
11
Avg Grade
A-
A or B
36%
D or F
45%
Grade Distribution
How Minnesota ZIP codes scored
A
1
9%
Excellent
B
3
27%
Good
C
2
18%
Fair
D
4
36%
Poor
F
1
9%
Failing
All ZIP Codes
All 11 ZIP codes in Minnesota
| ZIP Code | Primary City | Grade | Score | Score | Cities |
|---|---|---|---|---|---|
| 55089 | Welch | B+ | 80.5 | 1 | |
| 55372 | Prior Lake | B+ | 81.5 | 1 | |
| 55605 | Grand Portage | F | 35 | 1 | |
| 55720 | Cloquet | A- | 87.9 | 1 | |
| 55772 | Nett Lake | D | 46 | 1 | |
| 56241 | Granite Falls | B- | 72 | 1 | |
| 56270 | Morton | C+ | 68 | 1 | |
| 56359 | Onamia | D | 45 | 1 | |
| 56591 | White Earth | D | 46 | 1 | |
| 56633 | Cass Lake | C- | 56.1 | 1 | |
| 56671 | Red Lake | D+ | 50 | 1 |