TOMAH WATERWORKS
PWSID: WI6420254 · Tomah, WI · Serves 9,192 people
TOMAH WATERWORKS has 17 health-based violations out of 17 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.
TOMAH WATERWORKS (PWSID WI6420254) 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 9,192 people in Tomah, WI, and is subject to primacy enforcement by the Wisconsin drinking-water program.
The system's federal compliance record contains 17 total violations, with 17 classified as health-based (MCL exceedances or treatment-technique failures). 2 distinct contaminants have been cited, including Lead & Copper Rule, Nitrate. Recorded violations span 2014–2025.
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)
- WI6420254
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Tomah, WI
- Population Served
- 9,192
- Health Violations
- Yes (17)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Lead & Copper Rule | 15 | 15 |
| Nitrate | 2 | 2 |
Violation History (17)
| Contaminant | Health | Date |
|---|---|---|
| Nitrate | Yes | Apr 1, 2025 |
| Nitrate | Yes | Apr 1, 2025 |
| Lead & Copper Rule | Yes | Apr 1, 2018 |
| Lead & Copper Rule | Yes | Jan 1, 2018 |
| Lead & Copper Rule | Yes | Oct 1, 2017 |
| Lead & Copper Rule | Yes | Jul 1, 2017 |
| Lead & Copper Rule | Yes | Apr 1, 2017 |
| Lead & Copper Rule | Yes | Jan 1, 2017 |
| Lead & Copper Rule | Yes | Oct 1, 2016 |
| Lead & Copper Rule | Yes | Jul 1, 2016 |
| Lead & Copper Rule | Yes | Apr 1, 2016 |
| Lead & Copper Rule | Yes | Jan 1, 2016 |
| Lead & Copper Rule | Yes | Oct 1, 2015 |
| Lead & Copper Rule | Yes | Jul 1, 2015 |
| Lead & Copper Rule | Yes | Apr 1, 2015 |
| Lead & Copper Rule | Yes | Jan 1, 2015 |
| Lead & Copper Rule | Yes | Oct 1, 2014 |
Frequently Asked Questions
Is TOMAH WATERWORKS water safe to drink?
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What violations does TOMAH WATERWORKS have?
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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.