Orange Water Quality Report
27 cities ranked · Average grade: B+ · California
Avg Score
80.8
Cities Ranked
27
Health Violations
20
PFAS Detected
26
80.8
County avg score
27
Cities ranked
85%
A or B grade
4%
D or F grade
20
Health violations
26
PFAS detected
Grade Distribution
How Orange cities scored
A
12
44%
Excellent
B
11
41%
Good
C
3
11%
Fair
D
0
0%
Poor
F
1
4%
Failing
Comparison
County vs California average
▲ 4.3 pts above state average
City Map
Water quality across Orange
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Orange
County context
18
Superfund sites in Orange
1,706,793
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Orange
Industrial polluters nearby
Facilities reporting the most surface-water releases in Orange, 2023.
Total reported releases to surface water: 1,706,793 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
CHEVRON PRODUCTS CO. DIV OF CHEVRON USA INC. EL SEGUNDO, CA90245 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 1,705,351 |
TESORO LOS ANGELES REFINERY-CARSON OPERATIONS CARSON, CA90745 | Zinc compounds | 602 |
HILL BROTHERS CHEMICAL CO CITY OF INDUSTRY, CA91745 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 397 |
SEMCO ENTERPRISES INC CITY OF INDUSTRY, CA91744 | Zinc compounds | 142 |
US BORAX INC. WILMINGTON, CA90744 | Zinc compounds | 135 |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Orange
Superfund sites nearby
Federally tracked hazardous-waste sites within Orange on the EPA National Priorities List.
- COOPER DRUM CO
- DEL AMO
- EXIDE TECHNOLOGIES VERNON
- JERVIS B WEBB CO
- JET PROPULSION LABORATORY NASA
+ 13 more sites
Source: EPA Superfund National Priorities List
Full Rankings
All 27 cities in Orange
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Brea | A | 94.4 | 48K | 2 | ||
| 2 | Fountain Valley | A | 93.3 | 57K | 4 | ||
| 3 | Rancho Santa Margarita | A | 91.8 | 168K | 9 | Unresolved | |
| 4 | Midway City | A | 90.2 | 4K | 29 | Health Unresolved | |
| 5 | Costa Mesa | A- | 89.8 | 110K | 39 | Health Unresolved | |
| 6 | San Clemente | A- | 89.8 | 52K | 14 | Health Unresolved | |
| 7 | Seal Beach | A- | 88.8 | 25K | 2 | Unresolved | |
| 8 | La Habra | A- | 88.6 | 63K | 49 | Unresolved | |
| 9 | Trabuco Canyon | A- | 88.2 | 14K | 5 | Health Unresolved | |
| 10 | La Palma | A- | 87.2 | 16K | 3 | Unresolved | |
| 11 | Westminster | A- | 85.9 | 91K | 5 | Health PFAS Unresolved | |
| 12 | Villa Park | A- | 85.8 | 6K | 3 | Health Unresolved | |
| 13 | Buena Park | B+ | 84.5 | 82K | 5 | Health PFAS Unresolved | |
| 14 | Laguna Hills | B+ | 84.2 | 171K | 48 | Health Unresolved | |
| 15 | San Juan Capistrano | B+ | 83.2 | 40K | 42 | Health Unresolved | |
| 16 | Placentia | B+ | 82.8 | 84K | 1 | Unresolved | |
| 17 | Newport Beach | B+ | 81.7 | 70K | 40 | Health Unresolved | |
| 18 | Fullerton | B | 78.6 | 140K | 21 | Health PFAS Unresolved | |
| 19 | Laguna Beach | B | 78.1 | 64K | 110 | Health Unresolved | |
| 20 | Garden Grove | B | 76.8 | 175K | 18 | Health PFAS Unresolved | |
| 21 | Tustin | B | 76.3 | 68K | 48 | Health PFAS Unresolved | |
| 22 | Orange | B | 75.3 | 124K | 66 | Health PFAS Unresolved | |
| 23 | Lake Forest | B- | 72.3 | 52K | 52 | Health Unresolved | |
| 24 | Anaheim | C+ | 69.3 | 751K | 29 | Health PFAS Unresolved | |
| 25 | Santa Ana | C | 63.5 | 311K | 52 | Health PFAS Unresolved | |
| 26 | Huntington Beach | C- | 58.8 | 201K | 30 | Health PFAS Unresolved | |
| 27 | Irvine | F | 42.5 | 448K | 256 | Health Unresolved |