Stanislaus Water Quality Report
12 cities ranked · Average grade: B- · California
Avg Score
70
Cities Ranked
12
Health Violations
11
PFAS Detected
4
70
County avg score
12
Cities ranked
58%
A or B grade
33%
D or F grade
11
Health violations
4
PFAS detected
Grade Distribution
How Stanislaus cities scored
A
3
25%
Excellent
B
4
33%
Good
C
1
8%
Fair
D
3
25%
Poor
F
1
8%
Failing
Comparison
County vs California average
▼ 6.5 pts below state average
City Map
Water quality across Stanislaus
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Stanislaus
Best cities
Worst cities
County context
3
Superfund sites in Stanislaus
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Stanislaus
Industrial polluters nearby
Facilities reporting the most surface-water releases in Stanislaus, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
DARLING INGREDIENTS INC CROWS LANDING, CA95313 | — | — |
CRYSTAL CREAMERY INC. MODESTO, CA95351 | — | — |
CEMEX MODESTO PLANT MODESTO, CA95354 | — | — |
FRITO LAY INC. MODESTO, CA95357 | — | — |
GALLO GLASS CO MODESTO, CA95354 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Stanislaus
Superfund sites nearby
Federally tracked hazardous-waste sites within Stanislaus on the EPA National Priorities List.
- MODESTO GROUND WATER CONTAMINATION
- RIVERBANK ARMY AMMUNITION PLANT
- VALLEY WOOD PRESERVING INC
Source: EPA Superfund National Priorities List
Full Rankings
All 12 cities in Stanislaus
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Waterford | A+ | 97 | 1K | 0 | Zero violations | |
| 2 | Denair | A | 92.2 | 5K | 18 | Health Unresolved | |
| 3 | Newman | A- | 85.9 | 12K | 13 | Health Unresolved | |
| 4 | Patterson | B+ | 84.5 | 25K | 50 | Health Unresolved | |
| 5 | Keyes | B+ | 80.7 | 6K | 65 | Health | |
| 6 | Crows Landing | B | 78.8 | 570 | 19 | Health Unresolved | |
| 7 | Turlock | B- | 73.5 | 73K | 82 | Health Unresolved | |
| 8 | Oakdale | C- | 55.9 | 27K | 200 | Health Unresolved | |
| 9 | Hughson | D+ | 50 | 8K | 152 | Health Unresolved | |
| 10 | Modesto | D | 49.9 | 249K | 149 | Health PFAS Unresolved | |
| 11 | Riverbank | D | 46.8 | 25K | 89 | Health Unresolved | |
| 12 | Ceres | F | 44.5 | 55K | 168 | Health PFAS Unresolved |