Public water system · WI2650123
ActiveEast Troy Waterworks
At a glance
East Troy Waterworks (PWSID WI2650123) is an active community water system in Walworth County, Wisconsin. It reports serving 5,054 people through 1,484 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2005.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
5,054
Service connections
1,484
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does East Troy Waterworks compare with other water systems in Walworth County?
By EPA's size categories, East Troy Waterworks is a medium system (3,301 to 10,000 people). Walworth County has 252 active public water systems, and East Troy Waterworks is the 5th-largest of them by population served. Its population served is about 13 times the county average of 380 people per system, and accounts for 5.3% of the 95,693 people reported by systems filed under the county. Across Wisconsin, the 11,056 active systems average 469 people each. Nationally, the average active community water system reports serving 6,703 people, so East Troy Waterworks is about 25% below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Wisconsin has 1,053 active community water systems, 9.5% of the state's 11,056 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 10,978 Wisconsin systems (99%) list groundwater as their primary source.
Who owns and regulates East Troy Waterworks?
EPA lists East Troy Waterworks as owned by a local government. The WI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 29 of the 252 active systems in Walworth County (12%) are also owned by a local government.
Does East Troy Waterworks have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2005. The violations listed here began between July 2005 and July 2005. By type: 12 monitoring and reporting. The contaminants or rules involved are Chlorobenzene, 1,2-Dichloroethane, 1,2-Dichloropropane and 1,1,2-Trichloroethane. EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2005-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,2-Trichloroethanecode 2985 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylbenzenecode 2992 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
East Troy Waterworks: frequently asked questions
Who runs East Troy Waterworks?
East Troy Waterworks (PWSID WI2650123) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does East Troy Waterworks serve?
East Troy Waterworks reports serving 5,054 people through 1,484 service connections in Walworth County, Wisconsin.
Where does East Troy Waterworks get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does East Troy Waterworks have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2005. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is East Troy Waterworks' water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2005. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find East Troy Waterworks' water quality report?
As a community water system, East Troy Waterworks must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Walworth County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Whitewater Waterworks | Walworth | 14,000 | Community | Groundwater |
| Elkhorn Waterworks | Walworth | 10,317 | Community | Groundwater |
| Delavan Waterworks | Walworth | 9,028 | Community | Groundwater |
| Lake Geneva Utility Commission | Walworth | 7,107 | Community | Groundwater |
| Bloomfield, Village of | Walworth | 4,071 | Community | Groundwater |
| Lake Como Sanitary Dist 1 | Walworth | 3,038 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “East Troy Waterworks, PWSID WI2650123, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/east-troy-waterworks-wi2650123 (data as of October 1, 2026).