HORICON WATERWORKS
Wisconsin — Community Water System — PWSID: WI1140146
System Information
| PWSID | WI1140146 |
| System Name | HORICON 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 | Dec 17, 2025 |
Location & Contact
| State | Wisconsin |
| City | HORICON |
| ZIP Code | 53032-1260 |
| Address | 404 E LAKE ST |
| Organization | HORICON INTERIM CITY CLERK - CHRIS SPILKER |
| Phone | — |
Population & Service
| Population Served | 3,682 |
| Service Connections | 1,363 |
Drinking Water Violations (29)
This water system has 29 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, 2023 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 18, 2023 | Ground Water Rule |
| Jan 1, 2023 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 18, 2023 | Ground Water Rule |
| Jan 1, 2023 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 18, 2023 | Ground Water Rule |
| Jan 1, 2018 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 16, 2018 | Lead and Copper Rule |
| Jan 1, 2018 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 16, 2018 | Lead and Copper Rule |
| Jan 1, 2014 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Apr 3, 2014 | Ground Water Rule |
| Jan 1, 2014 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Apr 3, 2014 | Ground Water Rule |
| Jan 1, 2014 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Apr 3, 2014 | Ground Water Rule |
| Jan 1, 2014 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Apr 3, 2014 | Ground Water Rule |
| Sep 1, 2008 | Sep 30, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2008 | Total Coliform Rule |
| Sep 1, 2008 | Sep 30, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2008 | Total Coliform Rule |
| Jul 1, 2008 | Sep 30, 2008 | Chlorine | MR | No | No | — | 4.0 mg/L | — | Resolved | Sep 30, 2008 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2008 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 29, 2009 | Lead and Copper Rule |
| Jan 1, 2008 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 29, 2009 | Lead and Copper Rule |
| Jan 1, 2008 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 29, 2009 | Lead and Copper Rule |
| Jan 1, 2008 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 29, 2009 | Lead and Copper Rule |
| Jan 1, 2008 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 29, 2009 | Lead and Copper Rule |
| Jun 1, 2007 | Jun 30, 2007 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 28, 2007 | Total Coliform Rule |
| Jun 1, 2007 | Jun 30, 2007 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 28, 2007 | Total Coliform Rule |
| Jun 1, 2007 | Jun 30, 2007 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 28, 2007 | Total Coliform Rule |
| Jun 1, 2007 | Jun 30, 2007 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 28, 2007 | Total Coliform Rule |
| Jul 1, 2006 | Jul 31, 2006 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2006 | Total Coliform Rule |
| Jul 1, 2006 | Jul 31, 2006 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2006 | Total Coliform Rule |
| Jul 1, 2005 | Jul 31, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 28, 2005 | Total Coliform Rule |
| Nov 1, 2001 | Nov 30, 2001 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Nov 30, 2001 | Total Coliform Rule |
| Nov 1, 2001 | Nov 30, 2001 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Nov 30, 2001 | Total Coliform Rule |
| Jul 1, 1991 | Jul 31, 1991 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Jul 31, 1991 | Total Coliform Rule |
| Jul 1, 1991 | Jul 31, 1991 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Jul 31, 1991 | Total Coliform Rule |
| Jul 1, 1991 | Jul 31, 1991 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Jul 31, 1991 | Total Coliform Rule |
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.