59.6
County avg score
32
Cities ranked
38%
A or B grade
50%
D or F grade
30
Health violations
27
PFAS detected
Grade Distribution
How Maricopa cities scored
A
1
3%
Excellent
B
11
34%
Good
C
4
13%
Fair
D
3
9%
Poor
F
13
41%
Failing
Comparison
County vs Arizona average
▼ 8.8 pts below state average
City Map
Water quality across Maricopa
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Maricopa
County context
5
Superfund sites in Maricopa
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Maricopa
Industrial polluters nearby
Facilities reporting the most surface-water releases in Maricopa, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
CHEMRESEARCH CO. INC. PHOENIX, AZ85007 | — | — |
LINDE GAS & EQUIPMENT INC. PHOENIX, AZ85008 | — | — |
UNIVAR SOLUTIONS-PHOENIX PS PHOENIX, AZ85009 | — | — |
COLUMBUS CHEMICAL INDUSTRIES INC. EMPLOYEE STOCK OWNERSHIP P PHOENIX, AZ85009 | — | — |
WEST DIRECT OIL #41 PHX PHOENIX, AZ85009 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Maricopa
Superfund sites nearby
Federally tracked hazardous-waste sites within Maricopa on the EPA National Priorities List.
- HASSAYAMPA LANDFILL
- INDIAN BEND WASH AREA
- MOTOROLA INC 52ND STREET PLANT
- PHOENIX GOODYEAR AIRPORT AREA
- WILLIAMS AIR FORCE BASE
Source: EPA Superfund National Priorities List
Full Rankings
All 32 cities in Maricopa
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Carefree | A- | 89.8 | 4K | 36 | Unresolved | |
| 2 | Patton Place Estates | B+ | 84.8 | 638 | 49 | Unresolved | |
| 3 | White Tanks | B+ | 84.2 | 19K | 19 | Health Unresolved | |
| 4 | Circle City | B+ | 83.4 | 815 | 56 | Health Unresolved | |
| 5 | Sun City West | B+ | 82.9 | 26K | 103 | Health Unresolved | |
| 6 | Aguila | B+ | 81.9 | 987 | 113 | Health Unresolved | |
| 7 | Tolleson | B+ | 81.5 | 9K | 112 | Health Unresolved | |
| 8 | Rio Verde | B+ | 80.5 | 5K | 97 | Health Unresolved | |
| 9 | Pioneer | B | 79.3 | 583 | 120 | Health Unresolved | |
| 10 | Anthem | B | 78.1 | 24K | 123 | Health Unresolved | |
| 11 | Sun City | B | 76.8 | 38K | 296 | Health Unresolved | |
| 12 | Buckeye-Sono | B- | 74.9 | 16K | 114 | Health Unresolved | |
| 13 | Avondale | C+ | 66 | 83K | 218 | Health PFAS Unresolved | |
| 14 | Paradise Valley | C | 60.8 | 14K | 315 | Health Unresolved | |
| 15 | Cave Creek | C- | 57.6 | 10K | 311 | Health Unresolved | |
| 16 | Adaman | C- | 57.2 | 700 | 177 | Health Unresolved | |
| 17 | Tempe | D+ | 53.8 | 165K | 306 | Health PFAS Unresolved | |
| 18 | El Mirage | D | 46 | 40K | 835 | Health Unresolved | |
| 19 | Queen Creek | D | 45.7 | 96K | 551 | Health Unresolved | |
| 20 | Surprise | F | 44.9 | 65K | 966 | Health Unresolved | |
| 21 | Goodyear | F | 44 | 50K | 359 | Health PFAS Unresolved | |
| 22 | Buckeye | F | 43.8 | 67K | 1892 | Health Unresolved | |
| 23 | Fountain Hills | F | 43.5 | 7K | 494 | Health Unresolved | |
| 24 | Wickenburg | F | 43.2 | 10K | 597 | Health Unresolved | |
| 25 | Scottsdale | F | 43 | 244K | 1262 | Health Unresolved | |
| 26 | Peoria | F | 42.3 | 194K | 2366 | Health PFAS Unresolved | |
| 27 | Glendale | F | 42.2 | 9K | 1036 | Health Unresolved | |
| 28 | Mesa | F | 40.6 | 466K | 1579 | Health Unresolved | |
| 29 | Litchfield Park | F | 40.6 | 51K | 927 | Health PFAS Unresolved | |
| 30 | Chandler | F | 40.5 | 250K | 1179 | Health Unresolved | |
| 31 | Phoenix | F | 37.5 | 1.7M | 1269 | Health Unresolved | |
| 32 | Gilbert | F | 34.8 | 248K | 1070 | Health PFAS Unresolved |