Arizona
Water Quality Report
57 Fair
Average Score
57/100
Water Systems
350
Population
7.4M
Violations
2 2 unresolved
Score Distribution
3 A
1 B
0 C
1 D
0 F
Top Contaminant Violations
| Contaminant | Violations |
|---|---|
| Nitrate | 1 |
| Chromium (Total) | 1 |
| Radium-226 | 1 |
Lowest Scoring Water Systems
37
City of Scottsdale Water D
AZ0410025 Scottsdale, AZ 241,361 served
81
Salt River Project Water Services B
AZ0410002 Phoenix, AZ 800,000 served
100
City of Phoenix Water Services A
AZ0410001 Phoenix, AZ 1,626,078 served
100
Tucson Water A
AZ1010001 Tucson, AZ 548,073 served
100
City of Mesa Water A
AZ0410080 Mesa, AZ 508,958 served
Counties in Arizona
Cities in Arizona
View all 121 cities →Popular City Comparisons in Arizona
Quickly compare major cities in Arizona by water quality score and grade.
Frequently Asked Questions
Is tap water in Arizona safe to drink?
Arizona has an average WaterQ score of 57/100 across 350 public water systems. Safety can vary by city and system, so check your local report for recent violations and contaminants.
How many water systems are in Arizona?
WaterQ currently tracks 350 public water systems in Arizona.
Where can I compare cities in Arizona?
Use the city list below to open detailed reports, or visit the compare tool to benchmark two cities side-by-side on score, grade, and system coverage.