59
County avg score
9
Cities ranked
44%
A or B grade
56%
D or F grade
7
Health violations
5
PFAS detected
Grade Distribution
How Pima cities scored
A
1
11%
Excellent
B
3
33%
Good
C
0
0%
Fair
D
2
22%
Poor
F
3
33%
Failing
Comparison
County vs Arizona average
▼ 9.4 pts below state average
City Map
Water quality across Pima
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Pima
Worst cities
County context
1
Superfund site in Pima
2
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Pima
Industrial polluters nearby
Facilities reporting the most surface-water releases in Pima, 2023.
Total reported releases to surface water: 2 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
ASARCO LLC MISSION COMPLEX SAHUARITA, AZ85629 | Copper And Copper Compounds | 2 |
FREEPORT-MCMORAN SIERRITA INC GREEN VALLEY, AZ85614 | — | — |
VULCAN MATERIALS CO MARANA MARANA, AZ85653 | — | — |
SILVER BELL MINING LLC MARANA, AZ85653 | — | — |
CALPORTLAND CO TANGERINE PLANT MARANA, AZ85653 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Pima
Superfund sites nearby
Federally tracked hazardous-waste sites within Pima on the EPA National Priorities List.
- TUCSON INTERNATIONAL AIRPORT AREA
Source: EPA Superfund National Priorities List
Full Rankings
All 9 cities in Pima
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Silverbell | A | 92.8 | 3K | 39 | Unresolved | |
| 2 | Organ Pipe Nm | B | 79.7 | 755 | 53 | Health Unresolved | |
| 3 | Avra Valley | B- | 72.4 | 900 | 229 | Health Unresolved | |
| 4 | Ajo | B- | 70.6 | 3K | 163 | Unresolved | |
| 5 | Oro Valley | D | 49 | 47K | 1930 | Health Unresolved | |
| 6 | Green Valley | D | 46.2 | 22K | 1175 | Health Unresolved | |
| 7 | Marana | F | 42.2 | 19K | 923 | Health PFAS Unresolved | |
| 8 | Sahuarita | F | 40 | 19K | 798 | Health PFAS Unresolved | |
| 9 | Tucson | F | 38.1 | 852K | 11665 | Health PFAS Unresolved |