THERESA WATERWORKS
PWSID: WI1140154 · Theresa, WI · Serves 1,262 people
According to EPA Safe Drinking Water Information System (SDWIS), THERESA WATERWORKS (PWSID WI1140154) in Theresa, WI is listed as a CWS water system covering about 1,262 people. The same extract lists 2 health-based violation records spanning 2024-2025. Those 2 health-based rows for THERESA WATERWORKS cover contaminants such as Stage 1 Disinfectants and Disinfection Byproducts Rule, LEAD AND COPPER RULE REVISIONS; they remain historical EPA registry entries, not a current compliance or drinkability score.
THERESA WATERWORKS has 2 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 Stage 1 Disinfectants and Disinfection Byproducts Rule, LEAD AND COPPER RULE REVISIONS. Recorded violations span 2024–2025. 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)
- WI1140154
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Theresa, WI
- Population Served
- 1,262
- Health Violations
- Yes (2)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 1 | 1 |
| LEAD AND COPPER RULE REVISIONS | 1 | 1 |
Violation History (2)
| Contaminant | Health | Date |
|---|---|---|
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | Sep 3, 2025 |
| LEAD AND COPPER RULE REVISIONS | Yes | Oct 17, 2024 |
Frequently Asked Questions
What does EPA SDWIS list for THERESA WATERWORKS?
How many people does THERESA WATERWORKS serve?
What violations does THERESA WATERWORKS have?
What contaminants have been found in THERESA WATERWORKS water?
Compare beyond Wisconsin
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest THERESA WATERWORKS on cumulative violation count (2) and EPA-reported population served (1,262). Violation-count peers include SAINT REGIS MOHAWK TRIBE, REDBY/RED LAKE, Kickapoo Traditional Tribe. Population peers include OTTERBEIN WATER DEPARTMENT, WICOMICO SHORES, ANSONVILLE WATER SYSTEM.
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).
Nearby Water Systems
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About This Data
THERESA WATERWORKS (WI1140154) is drawn from EPA SDWIS. Nearby county systems in this extract include BEAVER DAM WATER UTILITY; HORICON WATERWORKS; LOMIRA WATERWORKS; JUNEAU WATERWORKS. Health-based rows (2 MCL/TT) are historical registry state, 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.