Tap water in Monrovia, CA — ZIP 91016
3 public water systems serving about 90,128 people. PFAS "forever chemicals" have been detected here.
D
Poor
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 91016
Monrovia-City, Water Dept.
PWSID CA1910090 · serves 37,931 ·
groundwater
0 health-based / 1 total violations (5 yrs)
· PFAS up to 14 ppt — above federal limit
Gswc-South Arcadia
PWSID CA1910212 · serves 27,430 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 22 ppt — above federal limit
Cal-Am Water Company - Duarte
PWSID CA1910186 · serves 24,767 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 5.1 ppt — above federal limit
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology