Sonoma Water Quality Report
16 cities ranked · Average grade: B · California
Avg Score
78.6
Cities Ranked
16
Health Violations
14
PFAS Detected
8
78.6
County avg score
16
Cities ranked
88%
A or B grade
13%
D or F grade
14
Health violations
8
PFAS detected
Grade Distribution
How Sonoma cities scored
A
6
38%
Excellent
B
8
50%
Good
C
0
0%
Fair
D
0
0%
Poor
F
2
13%
Failing
Comparison
County vs California average
▲ 2.1 pts above state average
City Map
Water quality across Sonoma
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Sonoma
County context
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Sonoma
Industrial polluters nearby
Facilities reporting the most surface-water releases in Sonoma, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
PARKER HANNIFIN CORP EMN NA ROHNERT PARK, CA94928 | — | — |
CLOVER STORNETTA FARMS INC PETALUMA, CA94952 | — | — |
U.S. COAST GUARD TRAINING CENTER PETALUMA PETALUMA, CA94952 | — | — |
LGC BIOSEARCH TECHNOLOGIES INC PETALUMA, CA94954 | — | — |
PERDUE FOODS LLC - PETALUMA POULTRY PROCESSING PLANT PETALUMA, CA94954 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 16 cities in Sonoma
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Windsor | A+ | 97.2 | 26K | 3 | Health | |
| 2 | Camp Meeker | A+ | 97 | 1K | 0 | Zero violations | |
| 3 | Guerneville | A | 92.4 | 10K | 12 | Health Unresolved | |
| 4 | Occidental | A | 90.5 | 951 | 51 | Health Unresolved | |
| 5 | Bodega Bay | A- | 89.8 | 1K | 13 | Health Unresolved | |
| 6 | Cotati | A- | 89.6 | 7K | 19 | Health Unresolved | |
| 7 | El Verano | B+ | 84.5 | 23K | 16 | PFAS Unresolved | |
| 8 | Healdsburg | B+ | 80.6 | 12K | 54 | Health Unresolved | |
| 9 | Petaluma | B | 78.5 | 62K | 32 | Health Unresolved | |
| 10 | Sea Ranch | B | 78.4 | 1K | 7 | Health Unresolved | |
| 11 | Cloverdale | B | 75.6 | 11K | 54 | Health Unresolved | |
| 12 | Sonoma | B- | 73.1 | 13K | 35 | Health PFAS Unresolved | |
| 13 | Forestville | B- | 72.5 | 9K | 78 | Health Unresolved | |
| 14 | Sebastopol | B- | 70.5 | 8K | 124 | Health Unresolved | |
| 15 | Rohnert Park | F | 44 | 55K | 407 | Health PFAS Unresolved | |
| 16 | Santa Rosa | F | 43.1 | 186K | 820 | Health Unresolved |