Tap water in Pleasanton, CA — ZIP 94566
3 public water systems serving about 137,953 people. PFAS "forever chemicals" have been detected here.
C
Fair
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 94566
City Of Pleasanton
PWSID CA0110008 · serves 76,689 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 26 ppt — above federal limit
California Water Service - Livermore
PWSID CA0110003 · serves 60,414 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 12 ppt — above federal limit
Kohala Ranch Water Co.
PWSID HI0000151 · serves 850 ·
groundwater
0 health-based / 0 total violations (5 yrs)
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology