JEFFERSON WATERWORKS
PWSID: WI1280104 · Jefferson, WI · Serves 7,926 people
JEFFERSON WATERWORKS has 23 health-based violations out of 23 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.
JEFFERSON WATERWORKS (PWSID WI1280104) is a cws water system drawing from a groundwater source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 7,926 people in Jefferson, WI, and is subject to primacy enforcement by the Wisconsin drinking-water program.
The system's federal compliance record contains 23 total violations, with 23 classified as health-based (MCL exceedances or treatment-technique failures). 2 distinct contaminants have been cited, including Lead & Copper Rule, Combined Radium 226/228. Recorded violations span 1993–2024.
A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Wisconsin state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- WI1280104
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Jefferson, WI
- Population Served
- 7,926
- Health Violations
- Yes (23)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Lead & Copper Rule | 22 | 22 |
| Combined Radium 226/228 | 1 | 1 |
Violation History (23)
| Contaminant | Health | Date |
|---|---|---|
| Lead & Copper Rule | Yes | Jul 1, 2024 |
| Lead & Copper Rule | Yes | Apr 1, 2024 |
| Lead & Copper Rule | Yes | Apr 1, 2024 |
| Lead & Copper Rule | Yes | Jan 1, 2024 |
| Lead & Copper Rule | Yes | Jan 1, 2024 |
| Lead & Copper Rule | Yes | Jan 1, 2024 |
| Lead & Copper Rule | Yes | Jan 1, 2024 |
| Lead & Copper Rule | Yes | Oct 1, 2023 |
| Lead & Copper Rule | Yes | Oct 1, 2023 |
| Lead & Copper Rule | Yes | Jul 1, 2023 |
| Lead & Copper Rule | Yes | Jul 1, 2023 |
| Lead & Copper Rule | Yes | Apr 1, 2023 |
| Lead & Copper Rule | Yes | Apr 1, 2023 |
| Lead & Copper Rule | Yes | Apr 1, 2023 |
| Lead & Copper Rule | Yes | Jan 1, 2023 |
| Lead & Copper Rule | Yes | Jan 1, 2023 |
| Lead & Copper Rule | Yes | Jan 1, 2023 |
| Lead & Copper Rule | Yes | Jan 1, 2023 |
| Lead & Copper Rule | Yes | Oct 1, 2022 |
| Lead & Copper Rule | Yes | Oct 1, 2022 |
| Lead & Copper Rule | Yes | Oct 1, 2022 |
| Lead & Copper Rule | Yes | Oct 1, 2022 |
| Combined Radium 226/228 | Yes | Jan 1, 1993 |
Frequently Asked Questions
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About This Data
Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Violation records may span multiple years.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.