Water Quality: Johnston, IA
2 water systems • 25,233 people served
No Health ViolationsWater Quality Summary
Johnston is served by 2 public water systems with a combined service population of 25,233 people, and has 36 EPA Safe Drinking Water Act violations on record. None of those violations are health-based — the records reflect missed monitoring or reporting deadlines rather than a contaminant exceeding safe levels. Johnston's violation count is 127% above the national average for Iowa.
Water Systems Serving Johnston
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| JOHNSTON MUNICIPAL WATER SUPPLY | IA7740011 | Surface Water | 24,064 | 0 |
| CAMP DODGE WATER SUPPLY | IA7700901 | Groundwater | 1,169 | 36 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Iowa
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.