Tap water in Rosemead, CA — ZIP 91770
4 public water systems serving about 354,670 people. PFAS "forever chemicals" have been detected here.
A
Excellent
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 91770
San Gabriel Valley Water Co.-El Monte
PWSID CA1910039 · serves 240,000 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 10 ppt
Cal/Am Water Company - San Marino
PWSID CA1910139 · serves 48,065 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 5.3 ppt
San Gabriel County Wd
PWSID CA1910144 · serves 40,154 ·
groundwater
0 health-based / 0 total violations (5 yrs)
Gswc-South San Gabriel
PWSID CA1910223 · serves 26,451 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 5.6 ppt
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology