Water Quality in Johnston, IA
3 water systems serving 25,633 people
City Overview
Average lead detection across Johnston water systems is 1.0 ppb (Very low). The EPA action level is 15 ppb.
Violation Summary
| Total violations on record | 100 |
| Health-based violations | 37 |
| Lead action level violations | 0 |
| Open (unresolved) violations | 0 |
Water Systems in Johnston
Frequently Asked Questions
Is Johnston tap water safe to drink?
Johnston 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 Johnston, Iowa?
Johnston has 3 public water systems serving approximately 25,633 people. The average lead level across sampled systems is 1.0 ppb. There are 100 total violations on record.
Does Johnston have lead in the water?
EPA monitoring data shows an average lead detection of 1.0 ppb across Johnston's water systems. The EPA action level is 15 ppb. No lead action level violations are currently reported.
How many water utilities serve Johnston?
3 public water systems are registered in Johnston, Iowa with the EPA Safe Drinking Water Information System. Together they serve approximately 25,633 people.