Water Quality in Napa, CA
146 water systems serving 107,588 people
City Overview
Average lead detection across Napa water systems is 4.5 ppb (Low). The EPA action level is 15 ppb. 5 systems have triggered action level violations.
Violation Summary
| Total violations on record | 1701 |
| Health-based violations | 229 |
| Lead action level violations | 5 |
| Open (unresolved) violations | 0 |
Water Systems in Napa
Frequently Asked Questions
Is Napa tap water safe to drink?
Napa 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 Napa, California?
Napa has 146 public water systems serving approximately 107,588 people. The average lead level across sampled systems is 4.5 ppb. There are 1701 total violations on record.
Does Napa have lead in the water?
EPA monitoring data shows an average lead detection of 4.5 ppb across Napa's water systems. The EPA action level is 15 ppb. 5 systems have triggered lead action level violations.
How many water utilities serve Napa?
146 public water systems are registered in Napa, California with the EPA Safe Drinking Water Information System. Together they serve approximately 107,588 people.