Tap water in Sonora, CA — ZIP 95370
4 public water systems serving about 29,988 people. PFAS "forever chemicals" have been detected here.
B
Good
PFAS detected: at least one system serving this ZIP reported PFAS in EPA UCMR 5
testing. Levels and the 2024 federal limits are shown per system below.
Water systems serving 95370
Tud - Upper Basin Water System
PWSID CA5510012 · serves 13,331 ·
surface water
0 health-based / 1 total violations (5 yrs)
Tud - Sonora/Jamestown Water System
PWSID CA5510001 · serves 11,113 ·
surface water
0 health-based / 1 total violations (5 yrs)
Tud - Columbia Water System
PWSID CA5510013 · serves 5,482 ·
surface water
0 health-based / 1 total violations (5 yrs)
Tud-Wards Ferry Ranches
PWSID CA5500363 · serves 62 ·
groundwater
0 health-based / 1 total violations (5 yrs)
· PFAS up to 4.8 ppt
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology