THERESA WATERWORKS
Wisconsin - Community Water System - PWSID: WI1140154
System Information
| PWSID | WI1140154 |
| System Name | THERESA WATERWORKS |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 05 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 28, 1981 |
| Last Reported | Mar 2, 2026 |
Location & Contact
| State | Wisconsin |
| City | THERESA |
| ZIP Code | 53091-0327 |
| Address | 292 MAYVILLE ST |
| Organization | THERESA VILLAGE CLERK AND TREASURER - BECKY TELLIER |
| Phone | - |
Population & Service
| Population Served | 1,262 |
| Service Connections | 569 |
Drinking Water Violations (232)
This water system has 232 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 3, 2025 | - | TT | Yes | No | - | - | - | Resolved | Sep 25, 2025 | - | |
| Sep 3, 2025 | - | TT | Yes | No | - | - | - | Resolved | Sep 25, 2025 | - | |
| Oct 17, 2024 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Oct 17, 2024 | - | TT | Yes | No | - | - | - | Unaddressed | - | - | |
| Jul 1, 2019 | - | Other | No | No | - | - | - | Resolved | Sep 24, 2019 | - | |
| Jul 1, 2019 | - | Other | No | No | - | - | - | Resolved | Sep 24, 2019 | - | |
| Jul 1, 2019 | - | Other | No | No | - | - | - | Resolved | Jul 27, 2019 | - | |
| Jul 1, 2019 | - | Other | No | No | - | - | - | Resolved | Sep 24, 2019 | - | |
| Jul 1, 2019 | - | Other | No | No | - | - | - | Resolved | Jul 27, 2019 | - | |
| Oct 1, 2018 | - | Other | No | No | - | - | - | Resolved | Dec 2, 2019 | - | |
| Oct 1, 2018 | - | Other | No | No | - | - | - | Resolved | Dec 2, 2019 | - | |
| Jul 1, 2018 | - | Other | No | No | - | - | - | Resolved | Aug 10, 2018 | - | |
| Jul 1, 2018 | - | Other | No | No | - | - | - | Resolved | Aug 10, 2018 | - | |
| Jul 1, 2018 | - | Other | No | No | - | - | - | Resolved | Aug 10, 2018 | - | |
| Jul 1, 2018 | - | Other | No | No | - | - | - | Resolved | Aug 10, 2018 | - | |
| Jul 1, 2018 | - | Other | No | No | - | - | - | Resolved | Aug 10, 2018 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | No | - | 0.060 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | No | - | 0.080 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2018 | - | MR | No | No | - | TT | - | Resolved | Jan 25, 2018 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | No | - | 0.080 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | No | - | 0.060 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | No | - | 0.080 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | No | - | 0.060 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | No | - | 0.060 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | No | - | 0.080 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2018 | - | MR | No | No | - | TT | - | Resolved | Jan 25, 2018 | - | |
| Sep 1, 2017 | Sep 30, 2017 | MON | No | Yes | - | - | - | Resolved | Sep 30, 2017 | - | |
| Sep 1, 2017 | Sep 30, 2017 | MON | No | Yes | - | - | - | Resolved | Sep 30, 2017 | - | |
| Sep 1, 2017 | Sep 30, 2017 | MON | No | Yes | - | - | - | Resolved | Sep 30, 2017 | - | |
| Sep 1, 2017 | Sep 30, 2017 | MON | No | Yes | - | - | - | Resolved | Sep 30, 2017 | - | |
| Jul 1, 2014 | Jul 31, 2014 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 2014 | - | |
| Jul 1, 2014 | Jul 31, 2014 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 2014 | - | |
| Jul 1, 2014 | Jul 31, 2014 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 2014 | - | |
| Jul 1, 2014 | Jul 31, 2014 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 2014 | - | |
| Jan 1, 2013 | Jan 31, 2013 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2013 | - | |
| Jan 1, 2013 | Mar 31, 2013 | MR | No | No | - | 4.0 mg/L | - | Resolved | Feb 19, 2013 | - | |
| Jan 1, 2013 | Jan 31, 2013 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2013 | - | |
| Jan 1, 2013 | Mar 31, 2013 | MR | No | No | - | 4.0 mg/L | - | Resolved | Feb 19, 2013 | - | |
| Jan 1, 2013 | Mar 31, 2013 | MR | No | No | - | 4.0 mg/L | - | Resolved | Feb 19, 2013 | - | |
| Jan 1, 2013 | Jan 31, 2013 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2013 | - | |
| Jan 1, 2013 | Jan 31, 2013 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2013 | - | |
| Jan 1, 2013 | Mar 31, 2013 | MR | No | No | - | 4.0 mg/L | - | Resolved | Feb 19, 2013 | - | |
| Jan 1, 2009 | Mar 31, 2009 | MR | No | Yes | - | - | - | Resolved | Mar 31, 2009 | - | |
| Jan 1, 2009 | Mar 31, 2009 | MR | No | Yes | - | - | - | Resolved | Mar 31, 2009 | - | |
| Jan 1, 2009 | Mar 31, 2009 | MR | No | Yes | - | - | - | Resolved | Mar 31, 2009 | - | |
| Jan 1, 2009 | Mar 31, 2009 | MR | No | Yes | - | - | - | Resolved | Mar 31, 2009 | - | |
| Oct 1, 2008 | Dec 31, 2008 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2008 | - | |
| Oct 1, 2008 | Dec 31, 2008 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2008 | - | |
| Oct 1, 2008 | Dec 31, 2008 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2008 | - | |
| Oct 1, 2008 | Dec 31, 2008 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2008 | - |
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.