Twin Falls Water Quality Report
5 cities ranked · Average grade: C+ · Idaho
Avg Score
65.9
Cities Ranked
5
Health Violations
5
PFAS Detected
2
65.9
County avg score
5
Cities ranked
60%
A or B grade
40%
D or F grade
5
Health violations
2
PFAS detected
Grade Distribution
How Twin Falls cities scored
A
0
0%
Excellent
B
3
60%
Good
C
0
0%
Fair
D
2
40%
Poor
F
0
0%
Failing
Comparison
County vs Idaho average
▼ 2.3 pts below state average
City Map
Water quality across Twin Falls
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Twin Falls
Best cities
Worst cities
County context
0.0%
of residents on fluoridated water (CDC, 2020)
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Twin Falls
Industrial polluters nearby
Facilities reporting the most surface-water releases in Twin Falls, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
JD HEISKELL & CO GOODING, ID83330 | — | — |
GLANBIA FOODS INC GOODING, ID83330 | — | — |
J D HEISKELL & CO WENDELL, ID83355 | — | — |
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 5 cities in Twin Falls
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Kimberly | B+ | 81.9 | 5K | 91 | Health Unresolved | |
| 2 | Hansen | B | 77.1 | 1K | 11 | Health Unresolved | |
| 3 | Filer | B- | 70.8 | 3K | 84 | Health Unresolved | |
| 4 | Twin Falls | D+ | 52.5 | 56K | 313 | Health Unresolved | |
| 5 | Buhl | D | 47.2 | 5K | 209 | Health Unresolved |