El Monte, CA water quality
El Monte, CA is served by 7 public water systems, serving 289,512 people combined. Across those systems, we count 3 health-based violations in the last 5 years. The worst Tap Grade among them is C.
Water systems serving El Monte
SAN GABRIEL VALLEY WATER CO.-EL MONTE
EL MONTE, CA · 248,000 served
EL MONTE-CITY, WATER DEPT.
EL MONTE, CA · 22,968 served
SAN GABRIEL VALLEY WATER CO-MONTEBELLO 1
EL MONTE, CA · 9,630 served
SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2
EL MONTE, CA · 7,330 served
DEL RIO MUTUAL
EL MONTE, CA · 700 served
HEMLOCK MUTUAL WATER CO.
EL MONTE, CA · 686 served
STERLING MUTUAL WATER COMPANY
EL MONTE, CA · 198 served
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Is El Monte, CA tap water safe to drink?
7 public water systems serve El Monte, CA, with 3 health-based violations in the last 5 years across them. The worst Tap Grade among them is C.
Does El Monte's water have lead in it?
The most recent 90th-percentile lead sample is 0 ppb, versus the EPA action level of 15 ppb.
Has PFAS been detected in El Monte's water?
Yes — at least one water system serving El Monte has detected PFAS under UCMR5.
Other cities in California
See all of California →Source: EPA SDWIS/ECHO · Data as of 2026Q2