JEFFERSON WATERWORKS
Wisconsin - Community Water System - PWSID: WI1280104
System Information
| PWSID | WI1280104 |
| System Name | JEFFERSON 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 | JEFFERSON |
| ZIP Code | 54549-1772 |
| Address | 317 S MAIN ST |
| Organization | COPSEY, SARAH - JEFFERSON CITY CLERK |
| Phone | - |
Population & Service
| Population Served | 7,926 |
| Service Connections | 3,072 |
Drinking Water Violations (61)
This water system has 61 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 1, 2024 | - | MR | No | No | - | TT | - | Resolved | Nov 19, 2024 | - | |
| Oct 1, 2024 | - | MR | No | No | - | TT | - | Resolved | Nov 19, 2024 | - | |
| Apr 1, 2024 | Jun 30, 2024 | MCL | Yes | No | 6.83 PCI/L | 5 pCi/L | 5.5 | Archived | Jun 30, 2024 | - | |
| Apr 1, 2024 | Jun 30, 2024 | MCL | Yes | No | 6.83 PCI/L | 5 pCi/L | 5.5 | Archived | Jun 30, 2024 | - | |
| Apr 1, 2024 | Jun 30, 2024 | MCL | Yes | No | 6.83 PCI/L | 5 pCi/L | 5.5 | Archived | Jun 30, 2024 | - | |
| Apr 1, 2024 | Jun 30, 2024 | MCL | Yes | No | 6.83 PCI/L | 5 pCi/L | 5.5 | Archived | Jun 30, 2024 | - | |
| Apr 1, 2024 | Jun 30, 2024 | MCL | Yes | No | 6.83 PCI/L | 5 pCi/L | 5.5 | Archived | Jun 30, 2024 | - | |
| Jan 1, 2024 | Mar 31, 2024 | MCL | Yes | No | 7.05 PCI/L | 5 pCi/L | 5.5 | Archived | Mar 31, 2024 | - | |
| Jan 1, 2024 | Mar 31, 2024 | MCL | Yes | No | 7.05 PCI/L | 5 pCi/L | 5.5 | Archived | Mar 31, 2024 | - | |
| Jan 1, 2024 | Mar 31, 2024 | MCL | Yes | No | 7.05 PCI/L | 5 pCi/L | 5.5 | Archived | Mar 31, 2024 | - | |
| Jan 1, 2024 | Mar 31, 2024 | MCL | Yes | No | 7.05 PCI/L | 5 pCi/L | 5.5 | Archived | Mar 31, 2024 | - | |
| Jan 1, 2024 | Mar 31, 2024 | MCL | Yes | No | 7.05 PCI/L | 5 pCi/L | 5.5 | Archived | Mar 31, 2024 | - | |
| Oct 1, 2023 | Dec 31, 2023 | MCL | Yes | No | 7.81 PCI/L | 5 pCi/L | 5.5 | Archived | Dec 31, 2023 | - | |
| Oct 1, 2023 | Dec 31, 2023 | MCL | Yes | No | 7.81 PCI/L | 5 pCi/L | 5.5 | Archived | Dec 31, 2023 | - | |
| Oct 1, 2023 | Dec 31, 2023 | MCL | Yes | No | 7.81 PCI/L | 5 pCi/L | 5.5 | Archived | Dec 31, 2023 | - | |
| Oct 1, 2023 | Dec 31, 2023 | MCL | Yes | No | 7.81 PCI/L | 5 pCi/L | 5.5 | Archived | Dec 31, 2023 | - | |
| Oct 1, 2023 | Dec 31, 2023 | MCL | Yes | No | 7.81 PCI/L | 5 pCi/L | 5.5 | Archived | Dec 31, 2023 | - | |
| Jul 1, 2023 | Sep 30, 2023 | MCL | Yes | No | 7.73 PCI/L | 5 pCi/L | 5.5 | Archived | Sep 30, 2023 | - | |
| Jul 1, 2023 | Sep 30, 2023 | MCL | Yes | No | 7.73 PCI/L | 5 pCi/L | 5.5 | Archived | Sep 30, 2023 | - | |
| Jul 1, 2023 | Sep 30, 2023 | MCL | Yes | No | 7.73 PCI/L | 5 pCi/L | 5.5 | Archived | Sep 30, 2023 | - | |
| Jul 1, 2023 | Sep 30, 2023 | MCL | Yes | No | 7.73 PCI/L | 5 pCi/L | 5.5 | Archived | Sep 30, 2023 | - | |
| Jul 1, 2023 | Sep 30, 2023 | MCL | Yes | No | 7.73 PCI/L | 5 pCi/L | 5.5 | Archived | Sep 30, 2023 | - | |
| Apr 1, 2023 | Jun 30, 2023 | MCL | Yes | No | 5.79 PCI/L | 5 pCi/L | 5.5 | Archived | Jun 30, 2023 | - | |
| Apr 1, 2023 | Jun 30, 2023 | MCL | Yes | No | 5.79 PCI/L | 5 pCi/L | 5.5 | Archived | Jun 30, 2023 | - | |
| Apr 1, 2023 | Jun 30, 2023 | MCL | Yes | No | 5.79 PCI/L | 5 pCi/L | 5.5 | Archived | Jun 30, 2023 | - | |
| Apr 1, 2023 | Jun 30, 2023 | MCL | Yes | No | 5.79 PCI/L | 5 pCi/L | 5.5 | Archived | Jun 30, 2023 | - | |
| Apr 1, 2023 | Jun 30, 2023 | MCL | Yes | No | 5.79 PCI/L | 5 pCi/L | 5.5 | Archived | Jun 30, 2023 | - | |
| Jan 1, 2023 | Mar 31, 2023 | MCL | Yes | No | 6.19 PCI/L | 5 pCi/L | 5.5 | Archived | Mar 31, 2023 | - | |
| Jan 1, 2023 | Mar 31, 2023 | MCL | Yes | No | 6.19 PCI/L | 5 pCi/L | 5.5 | Archived | Mar 31, 2023 | - | |
| Jan 1, 2023 | Mar 31, 2023 | MCL | Yes | No | 6.19 PCI/L | 5 pCi/L | 5.5 | Archived | Mar 31, 2023 | - | |
| Jan 1, 2023 | Mar 31, 2023 | MCL | Yes | No | 6.19 PCI/L | 5 pCi/L | 5.5 | Archived | Mar 31, 2023 | - | |
| Jan 1, 2023 | Mar 31, 2023 | MCL | Yes | No | 6.19 PCI/L | 5 pCi/L | 5.5 | Archived | Mar 31, 2023 | - | |
| Oct 1, 2022 | Dec 31, 2022 | MCL | Yes | No | 5.7525 MG/L | 5 pCi/L | 5.5 | Archived | Dec 31, 2022 | - | |
| Oct 1, 2022 | Dec 31, 2022 | MCL | Yes | No | 5.7525 MG/L | 5 pCi/L | 5.5 | Archived | Dec 31, 2022 | - | |
| Oct 1, 2022 | Dec 31, 2022 | MCL | Yes | No | 5.7525 MG/L | 5 pCi/L | 5.5 | Archived | Dec 31, 2022 | - | |
| Oct 1, 2022 | Dec 31, 2022 | MCL | Yes | No | 5.7525 MG/L | 5 pCi/L | 5.5 | Archived | Dec 31, 2022 | - | |
| Oct 1, 2022 | Dec 31, 2022 | MCL | Yes | No | 5.7525 MG/L | 5 pCi/L | 5.5 | Archived | Dec 31, 2022 | - | |
| May 10, 2010 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Jan 1, 2010 | Mar 31, 2010 | MCL | Yes | No | 19.1 PCI/L | 15 pCi/L | 15.5 | Resolved | Mar 31, 2010 | - | |
| Jan 1, 2010 | Mar 31, 2010 | MCL | Yes | No | 19.1 PCI/L | 15 pCi/L | 15.5 | Resolved | Mar 31, 2010 | - | |
| Jan 1, 2010 | Mar 31, 2010 | MCL | Yes | No | 19.1 PCI/L | 15 pCi/L | 15.5 | Resolved | Mar 31, 2010 | - | |
| Apr 1, 2009 | Jun 30, 2009 | MCL | Yes | No | 18.4 PCI/L | 15 pCi/L | 15.5 | Resolved | Jun 30, 2009 | - | |
| Apr 1, 2009 | Jun 30, 2009 | MCL | Yes | No | 18.4 PCI/L | 15 pCi/L | 15.5 | Resolved | Jun 30, 2009 | - | |
| Apr 1, 2009 | Jun 30, 2009 | MCL | Yes | No | 18.4 PCI/L | 15 pCi/L | 15.5 | Resolved | Jun 30, 2009 | - | |
| Apr 1, 2009 | Jun 30, 2009 | MCL | Yes | No | 18.4 PCI/L | 15 pCi/L | 15.5 | Resolved | Jun 30, 2009 | - | |
| Apr 1, 2009 | Jun 30, 2009 | MCL | Yes | No | 18.4 PCI/L | 15 pCi/L | 15.5 | Resolved | Jun 30, 2009 | - | |
| Apr 1, 2009 | Jun 30, 2009 | MCL | Yes | No | 18.4 PCI/L | 15 pCi/L | 15.5 | Resolved | Jun 30, 2009 | - | |
| Feb 28, 2002 | Mar 31, 2002 | MR | No | Yes | - | 15 pCi/L | - | Archived | Mar 31, 2002 | - | |
| Mar 1, 2000 | Mar 31, 2000 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 2000 | - | |
| Sep 1, 1993 | Sep 30, 1993 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 23, 1993 | - |
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.