WaterVerge

Tuolumne Water Quality Report

9 cities ranked · Average grade: B- · California

Avg Score
74.3
Cities Ranked
9
Health Violations
8
PFAS Detected
2
Live Water Alerts for California →
74.3
County avg score
9
Cities ranked
67%
A or B grade
11%
D or F grade
8
Health violations
2
PFAS detected

How Tuolumne cities scored

22%
44%
22%
11%
A
2
22%
Excellent
B
4
44%
Good
C
2
22%
Fair
D
1
11%
Poor
F
0
0%
Failing

County vs California average

B-
Tuolumne
74.3/100
B
California avg
76.5/100
▼ 2.2 pts below state average

Water quality across Tuolumne

Each dot is a city, colored by grade. Click any city to view its full report.

California city water quality map
0
lbs/yr to surface water · top 10 TRI facilities

Top industrial polluters in Tuolumne

Industrial polluters nearby

Facilities reporting the most surface-water releases in Tuolumne, 2023.

FacilityTop chemicalTo surface water (lbs/yr)
DV NATURAL RESOURCES--BRIGGS MINE
Metal Mining · DV NATURAL RESOURCES LLC
TRONA, CA93592

Source: EPA Toxic Release Inventory (TRI) 2023

All 9 cities in Tuolumne

# City Grade Score Score Population Violations Issues
1 Cold Springs
A-
89.9
2K 3 Unresolved
2 Claremont
A-
89
2K 73 Health Unresolved
3 Mi Wuk Village
B+
82.4
3K 30 Health Unresolved
4 La Grange
B
77.5
4K 55 Health Unresolved
5 Groveland
B-
71.5
3K 14 Health PFAS Unresolved
6 Pinecrest
B-
70
1K 7 Health Unresolved
7 Jamestown
C+
69.3
4K 54 Health Unresolved
8 Twain Harte
C+
66.2
4K 55 Health Unresolved
9 Sonora
D+
53.3
38K 110 Health Unresolved
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