Napa Water Quality Report
6 cities ranked · Average grade: B- · California
Avg Score
70.9
Cities Ranked
6
Health Violations
6
PFAS Detected
2
70.9
County avg score
6
Cities ranked
50%
A or B grade
17%
D or F grade
6
Health violations
2
PFAS detected
Grade Distribution
How Napa cities scored
A
2
33%
Excellent
B
1
17%
Good
C
2
33%
Fair
D
0
0%
Poor
F
1
17%
Failing
Comparison
County vs California average
▼ 5.6 pts below state average
City Map
Water quality across Napa
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Napa
County context
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Napa
Industrial polluters nearby
Facilities reporting the most surface-water releases in Napa, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
FOLEY PRODUCTS CO - NAPA AMERICAN CANYON, CA94503 | — | — |
WESTLAKE ROYAL STONE LLC - NAPA AMERICAN CANYON, CA94503 | — | — |
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 6 cities in Napa
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Yountville | A- | 86.4 | 4K | 10 | Health Unresolved | |
| 2 | American Canyon | A- | 85.5 | 21K | 17 | Health Unresolved | |
| 3 | Angwin | B | 76.9 | 3K | 73 | Health Unresolved | |
| 4 | Calistoga | C+ | 67.8 | 6K | 36 | Health PFAS Unresolved | |
| 5 | St. Helena | C+ | 66.8 | 6K | 69 | Health Unresolved | |
| 6 | Napa | F | 42 | 88K | 226 | Health Unresolved |