JOHNSTON MUNICIPAL WATER SUPPLY
Iowa — Community Water System — PWSID: IA7740011
System Information
| PWSID | IA7740011 |
| System Name | JOHNSTON MUNICIPAL WATER SUPPLY |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 07 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 27, 1979 |
| Last Reported | Mar 17, 2026 |
Location & Contact
| State | Iowa |
| City | JOHNSTON |
| ZIP Code | 50131 |
| Address | ATTN SHANE KINSEY |
| Organization | JOHNSTON, CITY OF |
| Phone | 515-278-0822 |
Population & Service
| Population Served | 24,064 |
| Service Connections | 7,657 |
Drinking Water Violations (21)
This water system has 21 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| May 1, 2013 | May 31, 2013 | MCL | Yes | No | — | 5% of samples | — | Resolved | May 31, 2013 | — | |
| May 1, 2013 | May 31, 2013 | MCL | Yes | No | — | 5% of samples | — | Resolved | May 31, 2013 | — | |
| May 1, 2013 | May 31, 2013 | MCL | Yes | No | — | 5% of samples | — | Resolved | May 31, 2013 | — | |
| May 1, 2013 | May 31, 2013 | MCL | Yes | No | — | 5% of samples | — | Resolved | May 31, 2013 | — | |
| Jan 1, 2006 | Mar 31, 2006 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Mar 31, 2006 | — | |
| Jan 1, 2006 | Mar 31, 2006 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Mar 31, 2006 | — | |
| Jan 1, 2006 | Mar 31, 2006 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Mar 31, 2006 | — | |
| Jan 1, 2006 | Mar 31, 2006 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Mar 31, 2006 | — | |
| Sep 1, 2003 | Sep 30, 2003 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2003 | — | |
| Sep 1, 2003 | Sep 30, 2003 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2003 | — | |
| Sep 1, 2003 | Sep 30, 2003 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2003 | — | |
| Sep 1, 2003 | Sep 30, 2003 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2003 | — | |
| Jul 1, 1993 | Jul 31, 1993 | MR | No | No | — | 5% of samples | — | Archived | Jul 31, 1993 | — | |
| Jul 1, 1993 | Jul 31, 1993 | MR | No | No | — | 5% of samples | — | Archived | Jul 31, 1993 | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
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| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
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| — | — | — | 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.