San Joaquin Water Quality Report
10 cities ranked · Average grade: B · California
Avg Score
77.1
Cities Ranked
10
Health Violations
10
PFAS Detected
6
77.1
County avg score
10
Cities ranked
70%
A or B grade
10%
D or F grade
10
Health violations
6
PFAS detected
Grade Distribution
How San Joaquin cities scored
A
5
50%
Excellent
B
2
20%
Good
C
2
20%
Fair
D
0
0%
Poor
F
1
10%
Failing
Comparison
County vs California average
▲ 0.6 pts above state average
City Map
Water quality across San Joaquin
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in San Joaquin
Best cities
Worst cities
County context
4
Superfund sites in San Joaquin
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in San Joaquin
Industrial polluters nearby
Facilities reporting the most surface-water releases in San Joaquin, 2023.
Total reported releases to surface water: 0 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
OLDCASTLE PACIFIC STOCKTON STOCKTON, CA95206 | Lead compounds | 0 |
CONCRETE INC STOCKTON, CA95203 | — | — |
GAF MATERIALS MFG LLC STOCKTON, CA95215 | — | — |
KENT'S OIL SERVICE INC. STOCKTON, CA95205 | — | — |
SCHUFF STEEL CO STOCKTON, CA95206 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in San Joaquin
Superfund sites nearby
Federally tracked hazardous-waste sites within San Joaquin on the EPA National Priorities List.
- LAWRENCE LIVERMORE NATL LAB SITE 300 USDOE
- MCCORMICK BAXTER CREOSOTING CO
- SHARPE ARMY DEPOT
- TRACY DEFENSE DEPOT USARMY
Source: EPA Superfund National Priorities List
Full Rankings
All 10 cities in San Joaquin
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Mountain House | A+ | 97.8 | 25K | 2 | Health | |
| 2 | Linden | A | 94.2 | 2K | 7 | Health Unresolved | |
| 3 | Escalon | A | 92.6 | 7K | 18 | Health Unresolved | |
| 4 | Lockeford | A- | 88.9 | 4K | 27 | Health Unresolved | |
| 5 | Ripon | A- | 86.3 | 16K | 21 | Health PFAS Unresolved | |
| 6 | Lathrop | B | 77.5 | 35K | 70 | Health PFAS Unresolved | |
| 7 | Manteca | B- | 70.2 | 85K | 57 | Health PFAS Unresolved | |
| 8 | Lodi | C+ | 68.8 | 70K | 47 | Health PFAS Unresolved | |
| 9 | Tracy | C | 61.1 | 98K | 118 | Health Unresolved | |
| 10 | Stockton | F | 33.3 | 223K | 1004 | Health PFAS Unresolved |