80.3
County avg score
2
Cities ranked
100%
A or B grade
0%
D or F grade
2
Health violations
2
PFAS detected
Grade Distribution
How Dewey 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 South Dakota average
▼ 1.3 pts below state average
City Map
Water quality across Dewey
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Dewey
Best cities
Worst cities
Full Rankings
All 2 cities in Dewey
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Ridgeview | A- | 86.2 | 2K | 67 | Health Unresolved | |
| 2 | Eagle Butte | B- | 74.5 | 6K | 92 | Health Unresolved |