TWIN LAKES UTILITIES
Iowa - Community Water System - PWSID: IA1300101
System Information
| PWSID | IA1300101 |
| System Name | TWIN LAKES UTILITIES |
| System Type | Community Water System |
| Water Source | Ground Water Purchased |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 07 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 27, 1979 |
| Last Reported | Mar 17, 2026 |
Location & Contact
| State | Iowa |
| City | ROCKWELL CITY |
| ZIP Code | 50568 |
| Address | ATTN ROGER NETZ MANAGER |
| Organization | TWIN LAKES UTILITIES |
| Phone | 712-297-8616 |
Population & Service
| Population Served | 300 |
| Service Connections | 400 |
Drinking Water Violations (78)
This water system has 78 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec 1, 2023 | - | MR | No | No | - | TT | - | Resolved | Feb 1, 2024 | - | |
| Dec 1, 2023 | - | MR | No | No | - | TT | - | Resolved | Feb 1, 2024 | - | |
| Mar 1, 2022 | - | MR | No | No | - | TT | - | Resolved | Apr 29, 2022 | - | |
| Mar 1, 2022 | - | MR | No | No | - | TT | - | Resolved | Apr 29, 2022 | - | |
| Mar 1, 2022 | - | MR | No | No | - | TT | - | Resolved | Apr 29, 2022 | - | |
| Mar 1, 2022 | - | MR | No | No | - | TT | - | Resolved | Apr 29, 2022 | - | |
| Mar 1, 2022 | - | MR | No | No | - | TT | - | Resolved | Apr 29, 2022 | - | |
| Mar 1, 2022 | - | MR | No | No | - | TT | - | Resolved | Apr 29, 2022 | - | |
| Mar 1, 2013 | Mar 31, 2013 | MCL | Yes | No | 1.5 MG/L | 1 mg/L | - | Resolved | Mar 31, 2013 | - | |
| Mar 1, 2013 | Mar 31, 2013 | MCL | Yes | No | 1.5 MG/L | 1 mg/L | - | Resolved | Mar 31, 2013 | - | |
| Mar 1, 2013 | Mar 31, 2013 | MCL | Yes | No | 1.5 MG/L | 1 mg/L | - | Resolved | Mar 31, 2013 | - | |
| Mar 1, 2013 | Mar 31, 2013 | MCL | Yes | No | 1.5 MG/L | 1 mg/L | - | Resolved | Mar 31, 2013 | - | |
| Dec 1, 2012 | Dec 31, 2012 | MCL | Yes | No | 1.2 MG/L | 1 mg/L | - | Resolved | Dec 31, 2012 | - | |
| Dec 1, 2012 | Dec 31, 2012 | MCL | Yes | No | 1.2 MG/L | 1 mg/L | - | Resolved | Dec 31, 2012 | - | |
| Dec 1, 2012 | Dec 31, 2012 | MCL | Yes | No | 1.2 MG/L | 1 mg/L | - | Resolved | Dec 31, 2012 | - | |
| Dec 1, 2012 | Dec 31, 2012 | MCL | Yes | No | 1.2 MG/L | 1 mg/L | - | Resolved | Dec 31, 2012 | - | |
| Nov 1, 2008 | Nov 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2008 | - | |
| Nov 1, 2008 | Nov 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2008 | - | |
| Nov 1, 2008 | Nov 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2008 | - | |
| Nov 1, 2008 | Nov 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2008 | - | |
| Nov 1, 2005 | Nov 30, 2005 | MCL | Yes | No | 1.1 | 1 mg/L | - | Resolved | Nov 30, 2005 | - | |
| Nov 1, 2005 | Nov 30, 2005 | MCL | Yes | No | 1.1 | 1 mg/L | - | Resolved | Nov 30, 2005 | - | |
| Nov 1, 2005 | Nov 30, 2005 | MCL | Yes | No | 1.1 | 1 mg/L | - | Resolved | Nov 30, 2005 | - | |
| Nov 1, 2005 | Nov 30, 2005 | MCL | Yes | No | 1.1 | 1 mg/L | - | Resolved | Nov 30, 2005 | - | |
| Jun 1, 2003 | Jun 30, 2003 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jun 30, 2003 | - | |
| Jun 1, 2003 | Jun 30, 2003 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jun 30, 2003 | - | |
| Jun 1, 2003 | Jun 30, 2003 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jun 30, 2003 | - | |
| Jun 1, 2003 | Jun 30, 2003 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jun 30, 2003 | - | |
| Oct 1, 1998 | Sep 30, 1999 | MCL | Yes | No | 2.8 | 1 mg/L | - | Resolved | Sep 30, 1999 | - | |
| Oct 1, 1998 | Sep 30, 1999 | MCL | Yes | No | 2.8 | 1 mg/L | - | Resolved | Sep 30, 1999 | - | |
| Aug 1, 1998 | Aug 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 1998 | - | |
| Aug 1, 1998 | Aug 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 1998 | - | |
| Aug 1, 1998 | Aug 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 1998 | - | |
| Aug 1, 1998 | Aug 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 1998 | - | |
| Oct 1, 1995 | Dec 31, 1995 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 1995 | - | |
| Oct 1, 1995 | Dec 31, 1995 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 1995 | - | |
| Oct 1, 1995 | Dec 31, 1995 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 1995 | - | |
| Oct 1, 1995 | Dec 31, 1995 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 1995 | - | |
| Sep 1, 1994 | Sep 30, 1994 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1994 | - | |
| Sep 1, 1994 | Sep 30, 1994 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1994 | - | |
| Sep 1, 1994 | Sep 30, 1994 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1994 | - | |
| Sep 1, 1994 | Sep 30, 1994 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1994 | - | |
| Sep 1, 1994 | Sep 30, 1994 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1994 | - | |
| Sep 1, 1994 | Sep 30, 1994 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1994 | - | |
| Sep 1, 1994 | Sep 30, 1994 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1994 | - | |
| Sep 1, 1994 | Sep 30, 1994 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1994 | - | |
| Jul 1, 1994 | Sep 30, 1994 | MR | No | Yes | - | 1 mg/L | - | Resolved | Sep 30, 1994 | - | |
| Jul 1, 1994 | Sep 30, 1994 | MR | No | Yes | - | 1 mg/L | - | Resolved | Sep 30, 1994 | - | |
| Jul 1, 1994 | Sep 30, 1994 | MR | No | Yes | - | 1 mg/L | - | Resolved | Sep 30, 1994 | - | |
| Jul 1, 1994 | Sep 30, 1994 | MR | No | Yes | - | 1 mg/L | - | Resolved | Sep 30, 1994 | - |
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.