Tap water in Downey, CA — ZIP 90242
2 public water systems serving about 118,655 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 90242
Downey - City, Water Dept.
PWSID CA1910034 · serves 110,556 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 44 ppt — above federal limit
Gswc - Hollydale
PWSID CA1910195 · serves 8,099 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 5.5 ppt
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology