La Mesa, CA water quality
La Mesa, CA is served by 3 public water systems, serving 278,268 people combined. Across those systems, we count 14 health-based violations in the last 5 years. The worst Tap Grade among them is F.
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Is La Mesa, CA tap water safe to drink?
3 public water systems serve La Mesa, CA, with 14 health-based violations in the last 5 years across them. The worst Tap Grade among them is F.
Does La Mesa'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 La Mesa's water?
These systems were tested under UCMR5 and no PFAS was detected above the reporting limit in the analytes we track.
Other cities in California
See all of California →Source: EPA SDWIS/ECHO · Data as of 2026Q2