Water Quality in Naperville, IL
122 water systems serving 169,137 people
City Overview
Average lead detection across Naperville water systems is 4.2 ppb (Low). The EPA action level is 15 ppb.
Violation Summary
| Total violations on record | 2960 |
| Health-based violations | 37 |
| Lead action level violations | 0 |
| Open (unresolved) violations | 0 |
Water Systems in Naperville
Frequently Asked Questions
Is Naperville tap water safe to drink?
Naperville 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 Naperville, Illinois?
Naperville has 122 public water systems serving approximately 169,137 people. The average lead level across sampled systems is 4.2 ppb. There are 2960 total violations on record.
Does Naperville have lead in the water?
EPA monitoring data shows an average lead detection of 4.2 ppb across Naperville's water systems. The EPA action level is 15 ppb. No lead action level violations are currently reported.
How many water utilities serve Naperville?
122 public water systems are registered in Naperville, Illinois with the EPA Safe Drinking Water Information System. Together they serve approximately 169,137 people.