Water Quality in O Fallon, MO
16 water systems serving 143,492 people
City Overview
Average lead detection across O Fallon water systems is 2.1 ppb (Low). The EPA action level is 15 ppb.
Violation Summary
| Total violations on record | 1063 |
| Health-based violations | 305 |
| Lead action level violations | 0 |
| Open (unresolved) violations | 0 |
Water Systems in O Fallon
Frequently Asked Questions
Is O Fallon tap water safe to drink?
O Fallon 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 O Fallon, Missouri?
O Fallon has 16 public water systems serving approximately 143,492 people. The average lead level across sampled systems is 2.1 ppb. There are 1063 total violations on record.
Does O Fallon have lead in the water?
EPA monitoring data shows an average lead detection of 2.1 ppb across O Fallon's water systems. The EPA action level is 15 ppb. No lead action level violations are currently reported.
How many water utilities serve O Fallon?
16 public water systems are registered in O Fallon, Missouri with the EPA Safe Drinking Water Information System. Together they serve approximately 143,492 people.