Montana ZIP Code Water Quality
8 ZIP codes with water quality data · State average grade: C+
ZIP Codes
8
Avg Grade
C+
A or B
38%
D or F
63%
Grade Distribution
How Montana ZIP codes scored
A
0
0%
Excellent
B
3
38%
Good
C
0
0%
Fair
D
2
25%
Poor
F
3
38%
Failing