ONAWA MUNICIPAL WATER PLANT
Iowa — Community Water System — PWSID: IA6739095
System Information
| PWSID | IA6739095 |
| System Name | ONAWA MUNICIPAL WATER PLANT |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 07 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 27, 1979 |
| Last Reported | Dec 19, 2025 |
Location & Contact
| State | Iowa |
| City | ONAWA |
| ZIP Code | 51040 |
| Address | ATTN WATER SUPT |
| Organization | ONAWA MUNICIPAL WATER PLANT |
| Phone | 712-420-5313 |
Population & Service
| Population Served | 2,906 |
| Service Connections | 1,350 |
Drinking Water Violations (3)
This water system has 3 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 1, 1988 | Mar 31, 1991 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 1991 | Nitrate Rule |
| Apr 1, 1988 | Mar 31, 1991 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 1991 | Nitrate Rule |
| — | — | — | No | No | — | — | — | — | — | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.