80.4
County avg score
14
Cities ranked
79%
A or B grade
14%
D or F grade
14
Health violations
4
PFAS detected
Grade Distribution
How Santa Clara cities scored
A
9
64%
Excellent
B
2
14%
Good
C
1
7%
Fair
D
1
7%
Poor
F
1
7%
Failing
Comparison
County vs California average
▲ 3.9 pts above state average
City Map
Water quality across Santa Clara
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Santa Clara
County context
21
Superfund sites in Santa Clara
15
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Santa Clara
Industrial polluters nearby
Facilities reporting the most surface-water releases in Santa Clara, 2023.
Total reported releases to surface water: 15 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
BURKE INDUSTRIES INC SAN JOSE, CA95112 | Zinc compounds | 8 |
NORTHROP GRUMMAN SYSTEMS CORP SUNNYVALE, CA94086 | Nickel And Nickel Compounds | 3 |
HILL BROTHERS CHEMICAL CO SAN JOSE, CA95131 | Ammonia | 3 |
TTM TECHNOLOGIES N.A. LLC SANTA CLARA, CA95050 | Copper compounds | 1 |
LENTHOR ENGINEERING MILPITAS, CA95035 | Copper And Copper Compounds | 0 |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Santa Clara
Superfund sites nearby
Federally tracked hazardous-waste sites within Santa Clara on the EPA National Priorities List.
- ADVANCED MICRO DEVICES INC
- ADVANCED MICRO DEVICES INC BUILDING 915
- APPLIED MATERIALS
- CTS PRINTEX INC
- FAIRCHILD SEMICONDUCTOR CORP MOUNTAIN VIEW PLANT
+ 16 more sites
Source: EPA Superfund National Priorities List
Full Rankings
All 14 cities in Santa Clara
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Cupertino | A+ | 96.3 | 16K | 3 | Health | |
| 2 | Stanford | A+ | 96 | 36K | 3 | Health | |
| 3 | Mountain View | A | 91.9 | 82K | 7 | Health Unresolved | |
| 4 | Moffett Field | A | 91.8 | 16K | 2 | Health | |
| 5 | Sunnyvale | A | 90.2 | 158K | 69 | Health Unresolved | |
| 6 | San Martin | A- | 89.4 | 961 | 69 | Health Unresolved | |
| 7 | Los Altos Hills | A- | 89.3 | 6K | 6 | Health Unresolved | |
| 8 | Palo Alto | A- | 89.2 | 70K | 12 | Health Unresolved | |
| 9 | Milpitas | A- | 88.9 | 82K | 9 | Health Unresolved | |
| 10 | Saratoga | B+ | 83.4 | 1K | 75 | Health Unresolved | |
| 11 | Santa Clara | B | 77.9 | 131K | 47 | Health Lead | |
| 12 | Gilroy | C+ | 67 | 60K | 76 | Health PFAS Unresolved | |
| 13 | Los Gatos | D | 46 | 4K | 471 | Health Unresolved | |
| 14 | San Jose | F | 28 | 3.2M | 556 | Health PFAS Unresolved |