Columbia Water Quality Report
1 cities ranked · Average grade: A- · Washington
Avg Score
89.1
Cities Ranked
1
Health Violations
1
PFAS Detected
0
89.1
County avg score
1
Cities ranked
100%
A or B grade
0%
D or F grade
1
Health violations
0
PFAS detected
Grade Distribution
How Columbia cities scored
A
1
100%
Excellent
B
0
0%
Good
C
0
0%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Washington average
▲ 19.0 pts above state average
City Map
Water quality across Columbia
Each dot is a city, colored by grade. Click any city to view its full report.
Full Rankings
All 1 cities in Columbia
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Dayton | A- | 89.1 | 3K | 15 | Health Unresolved |