Water Quality in Onalaska, WI
43 water systems serving 22,340 people
City Overview
Average lead detection across Onalaska water systems is 2.0 ppb (Low). The EPA action level is 15 ppb.
Violation Summary
| Total violations on record | 297 |
| Health-based violations | 144 |
| Lead action level violations | 0 |
| Open (unresolved) violations | 0 |
Water Systems in Onalaska
Frequently Asked Questions
Is Onalaska tap water safe to drink?
Onalaska 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 Onalaska, Wisconsin?
Onalaska has 43 public water systems serving approximately 22,340 people. The average lead level across sampled systems is 2.0 ppb. There are 297 total violations on record.
Does Onalaska have lead in the water?
EPA monitoring data shows an average lead detection of 2.0 ppb across Onalaska's water systems. The EPA action level is 15 ppb. No lead action level violations are currently reported.
How many water utilities serve Onalaska?
43 public water systems are registered in Onalaska, Wisconsin with the EPA Safe Drinking Water Information System. Together they serve approximately 22,340 people.