ONSLOW WATER SUPPLY
Iowa - Community Water System - PWSID: IA5358096
System Information
| PWSID | IA5358096 |
| System Name | ONSLOW WATER SUPPLY |
| 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 | Mar 17, 2026 |
Location & Contact
| State | Iowa |
| City | WYOMING |
| ZIP Code | 52362 |
| Address | ATTN RODNEY GRAVEL OPERATOR |
| Organization | ONSLOW WATER SUPPLY |
| Phone | 319-821-0124 |
Population & Service
| Population Served | 201 |
| Service Connections | 110 |
Drinking Water Violations (123)
This water system has 123 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jul 1, 2019 | - | Other | No | No | - | - | - | Resolved | Oct 3, 2019 | - | |
| Jul 1, 2019 | - | Other | No | No | - | - | - | Resolved | Oct 3, 2019 | - | |
| Jul 1, 2019 | - | Other | No | No | - | - | - | Resolved | Oct 3, 2019 | - | |
| Jul 1, 2017 | - | Other | No | No | - | - | - | Resolved | Oct 27, 2017 | - | |
| Jul 1, 2017 | - | Other | No | No | - | - | - | Resolved | Oct 27, 2017 | - | |
| Jul 1, 2017 | - | Other | No | No | - | - | - | Resolved | Oct 27, 2017 | - | |
| Jul 1, 2017 | - | Other | No | No | - | - | - | Resolved | Oct 27, 2017 | - | |
| Jul 1, 2013 | - | Other | No | No | - | - | - | Resolved | Sep 23, 2013 | - | |
| Jul 1, 2013 | - | Other | No | No | - | - | - | Resolved | Sep 23, 2013 | - | |
| Jul 1, 2013 | - | Other | No | No | - | - | - | Resolved | Sep 23, 2013 | - | |
| Jun 1, 2012 | - | MR | No | No | - | TT | - | Resolved | Aug 31, 2015 | - | |
| Jun 1, 2012 | - | MR | No | No | - | TT | - | Resolved | Aug 31, 2015 | - | |
| Jun 1, 2012 | - | MR | No | No | - | TT | - | Resolved | Aug 31, 2015 | - | |
| Jun 1, 2012 | - | MR | No | No | - | TT | - | Resolved | Aug 31, 2015 | - | |
| Jul 1, 2002 | Jul 31, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2002 | - | |
| Jul 1, 2002 | Jul 31, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2002 | - | |
| Jul 1, 2002 | Jul 31, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2002 | - | |
| Jul 1, 2000 | - | Other | No | No | - | - | - | Resolved | May 23, 2001 | - | |
| Jul 1, 2000 | - | Other | No | No | - | - | - | Resolved | May 23, 2001 | - | |
| Jul 1, 2000 | - | Other | No | No | - | - | - | Resolved | May 23, 2001 | - | |
| Jul 1, 2000 | - | Other | No | No | - | - | - | Resolved | May 23, 2001 | - | |
| Oct 1, 1999 | - | MR | No | No | - | TT | - | Resolved | Dec 21, 2000 | - | |
| Oct 1, 1999 | - | MR | No | No | - | TT | - | Resolved | Dec 21, 2000 | - | |
| Oct 1, 1999 | - | MR | No | No | - | TT | - | Resolved | Dec 21, 2000 | - | |
| Apr 1, 1996 | Jun 30, 1996 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jun 30, 1996 | - | |
| Apr 1, 1996 | Jun 30, 1996 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jun 30, 1996 | - | |
| Apr 1, 1996 | Jun 30, 1996 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jun 30, 1996 | - | |
| Apr 1, 1996 | Apr 30, 1996 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Apr 30, 1996 | - | |
| Apr 1, 1996 | Apr 30, 1996 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Apr 30, 1996 | - | |
| Apr 1, 1996 | Apr 30, 1996 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Apr 30, 1996 | - | |
| Apr 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Apr 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Apr 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Apr 1, 1995 | Apr 30, 1995 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Apr 30, 1995 | - | |
| Apr 1, 1995 | Apr 30, 1995 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Apr 30, 1995 | - | |
| Apr 1, 1995 | Apr 30, 1995 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Apr 30, 1995 | - | |
| Oct 1, 1989 | - | MR | No | No | - | TT | - | Resolved | Sep 26, 1990 | - | |
| Oct 1, 1989 | - | MR | No | No | - | TT | - | Resolved | Sep 26, 1990 | - | |
| Oct 1, 1989 | - | MR | No | No | - | TT | - | Resolved | Sep 26, 1990 | - | |
| Oct 1, 1989 | - | MR | No | No | - | TT | - | Resolved | Sep 26, 1990 | - | |
| Oct 1, 1989 | - | MR | No | No | - | TT | - | Resolved | Sep 26, 1990 | - | |
| Apr 1, 1987 | Mar 31, 1990 | MR | No | Yes | - | 2 mg/L | - | Resolved | Mar 31, 1990 | - | |
| Apr 1, 1987 | Mar 31, 1990 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 1990 | - | |
| Apr 1, 1987 | Mar 31, 1990 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Mar 31, 1990 | - | |
| Apr 1, 1987 | Mar 31, 1990 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Mar 31, 1990 | - | |
| Apr 1, 1987 | Mar 31, 1990 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 1990 | - |
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.