Water Quality in Costa Mesa, CA
8 water systems serving 111,325 people
City Overview
Average lead detection across Costa Mesa water systems is 1.0 ppb (Very low). The EPA action level is 15 ppb.
Violation Summary
| Total violations on record | 145 |
| Health-based violations | 20 |
| Lead action level violations | 0 |
| Open (unresolved) violations | 0 |
Water Systems in Costa Mesa
Frequently Asked Questions
Is Costa Mesa tap water safe to drink?
Costa Mesa tap water meets EPA standards for most contaminants. Review the individual water system pages below for the latest lead sample results and violation history.
What is the water quality in Costa Mesa, California?
Costa Mesa has 8 public water systems serving approximately 111,325 people. The average lead level across sampled systems is 1.0 ppb. There are 145 total violations on record.
Does Costa Mesa have lead in the water?
EPA monitoring data shows an average lead detection of 1.0 ppb across Costa Mesa's water systems. The EPA action level is 15 ppb. No lead action level violations are currently reported.
How many water utilities serve Costa Mesa?
8 public water systems are registered in Costa Mesa, California with the EPA Safe Drinking Water Information System. Together they serve approximately 111,325 people.