Tap water in Spring Valley, CA — ZIP 91978
2 public water systems serving about 520,073 people.
A
Excellent
Water systems serving 91978
Helix Water District
PWSID CA3710010 · serves 277,918 ·
surface water
0 health-based / 0 total violations (5 yrs)
Otay Water District
PWSID CA3710034 · serves 242,155 ·
surface water
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