Delta Water Quality Report
6 cities ranked · Average grade: C- · Colorado
Avg Score
55.4
Cities Ranked
6
Health Violations
5
PFAS Detected
1
55.4
County avg score
6
Cities ranked
33%
A or B grade
67%
D or F grade
5
Health violations
1
PFAS detected
Grade Distribution
How Delta cities scored
A
1
17%
Excellent
B
1
17%
Good
C
0
0%
Fair
D
2
33%
Poor
F
2
33%
Failing
Comparison
County vs Colorado average
▼ 10.7 pts below state average
City Map
Water quality across Delta
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Delta
Best cities
Worst cities
Full Rankings