Custer Water Quality Report
2 cities ranked · Average grade: B+ · Idaho
Avg Score
84.6
Cities Ranked
2
Health Violations
2
PFAS Detected
0
84.6
County avg score
2
Cities ranked
100%
A or B grade
0%
D or F grade
2
Health violations
0
PFAS detected
Grade Distribution
How Custer cities scored
A
1
50%
Excellent
B
1
50%
Good
C
0
0%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Idaho average
▲ 16.4 pts above state average
City Map
Water quality across Custer
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Custer
Best cities
Worst cities
County context
0.0%
of residents on fluoridated water (CDC, 2020)
29,253
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Custer
Industrial polluters nearby
Facilities reporting the most surface-water releases in Custer, 2023.
Total reported releases to surface water: 29,253 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
THOMPSON CREEK MINING CO CLAYTON, ID83227 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 29,253 |
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings