Marin Water Quality Report
8 cities ranked · Average grade: A- · California
Avg Score
86.7
Cities Ranked
8
Health Violations
6
PFAS Detected
1
86.7
County avg score
8
Cities ranked
100%
A or B grade
0%
D or F grade
6
Health violations
1
PFAS detected
Grade Distribution
How Marin cities scored
A
6
75%
Excellent
B
2
25%
Good
C
0
0%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs California average
▲ 10.2 pts above state average
City Map
Water quality across Marin
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Marin
County context
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Marin
Industrial polluters nearby
Facilities reporting the most surface-water releases in Marin, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
LGC BIOSEARCH TECHNOLOGIES INC. NOVATO, CA94949 | — | — |
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 8 cities in Marin
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Sausalito | A+ | 96.6 | 18K | 10 | Health | |
| 2 | Bolinas | A- | 89.2 | 2K | 55 | Health Unresolved | |
| 3 | Inverness | A- | 87.6 | 1K | 31 | Health Unresolved | |
| 4 | Corte Madera | A- | 86.7 | 187K | 1 | Unresolved | |
| 5 | Point Reyes Station | A- | 86.7 | 2K | 38 | Unresolved | |
| 6 | Stinson Beach | A- | 86.1 | 583 | 4 | Health Unresolved | |
| 7 | Novato | B+ | 82.5 | 64K | 15 | Health Unresolved | |
| 8 | Dillon Beach | B | 78 | 1K | 65 | Health |