TOMAH WATERWORKS
PWSID: WI6420254 · WI · Serves 9,192 people
According to EPA Safe Drinking Water Information System (SDWIS), TOMAH WATERWORKS (PWSID WI6420254) in WI is listed as a CWS water system covering about 9,192 people. The same extract lists 17 health-based violation records spanning 2014-2025. Those 17 health-based rows for TOMAH WATERWORKS cover contaminants such as Combined Radium (-226 and -228), Nitrate; they remain historical EPA registry entries, not a current compliance or drinkability score.
TOMAH WATERWORKS has 17 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 2 distinct EPA contaminant codes appear in this system's record, including Combined Radium (-226 and -228), Nitrate. Recorded violations span 2014–2025. Day-to-day primacy enforcement for this system runs through the Wisconsin drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current 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
- WI
- Population Served
- 9,192
- Health Violations
- Yes (17)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Combined Radium (-226 and -228) | 15 | 15 |
| Nitrate | 2 | 2 |
Violation History (17)
| Contaminant | Health | Date |
|---|---|---|
| Nitrate | Yes | Apr 1, 2025 |
| Nitrate | Yes | Apr 1, 2025 |
| Combined Radium (-226 and -228) | Yes | Apr 1, 2018 |
| Combined Radium (-226 and -228) | Yes | Jan 1, 2018 |
| Combined Radium (-226 and -228) | Yes | Oct 1, 2017 |
| Combined Radium (-226 and -228) | Yes | Jul 1, 2017 |
| Combined Radium (-226 and -228) | Yes | Apr 1, 2017 |
| Combined Radium (-226 and -228) | Yes | Jan 1, 2017 |
| Combined Radium (-226 and -228) | Yes | Oct 1, 2016 |
| Combined Radium (-226 and -228) | Yes | Jul 1, 2016 |
| Combined Radium (-226 and -228) | Yes | Apr 1, 2016 |
| Combined Radium (-226 and -228) | Yes | Jan 1, 2016 |
| Combined Radium (-226 and -228) | Yes | Oct 1, 2015 |
| Combined Radium (-226 and -228) | Yes | Jul 1, 2015 |
| Combined Radium (-226 and -228) | Yes | Apr 1, 2015 |
| Combined Radium (-226 and -228) | Yes | Jan 1, 2015 |
| Combined Radium (-226 and -228) | Yes | Oct 1, 2014 |
Frequently Asked Questions
What does EPA SDWIS list for TOMAH WATERWORKS?
How many people does TOMAH WATERWORKS serve?
What violations does TOMAH WATERWORKS have?
What contaminants have been found in TOMAH WATERWORKS water?
Compare beyond Wisconsin
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest TOMAH WATERWORKS on cumulative violation count (17) and EPA-reported population served (9,192). Violation-count peers include Colorado River Regional Water System, SOUTH TONGASS WATER UTILITY, DERMOTT WATERWORKS. Population peers include NJ AMERICAN WATER - HARRISON, LAKE CITY CITY OF (SC2110007), CHATTOOGA COUNTY.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Similar population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ gate).
Explore More
About This Data
TOMAH WATERWORKS (WI6420254) is drawn from EPA SDWIS. Health-based rows in this extract are MCL and Treatment Technique records spanning 2014-2025 covering Combined Radium (-226 and -228), Nitrate. Historical registry entries, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.