Public water system · WI7290122
ActiveElroy Waterworks
At a glance
Elroy Waterworks (PWSID WI7290122) is an active community water system in Juneau County, Wisconsin. It reports serving 1,333 people through 647 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; 5 are health-based, and the most recent began in September 2014.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,333
Service connections
647
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Elroy Waterworks compare with other water systems in Juneau County?
By EPA's size categories, Elroy Waterworks is a small system (501 to 3,300 people). Juneau County has 146 active public water systems, and Elroy Waterworks is the 6th-largest of them by population served. Its population served is about 7.3 times the county average of 182 people per system, and accounts for 5% of the 26,525 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 Elroy Waterworks is well 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 Elroy Waterworks?
EPA lists Elroy 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. 24 of the 146 active systems in Juneau County (16%) are also owned by a local government.
Does Elroy Waterworks have drinking water violations?
EPA's records list 8 violations for this system; 5 are health-based, and the most recent began in September 2014. The violations listed here began between September 1994 and September 2014. By type: 5 contaminant level above the legal limit, 2 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 8 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 |
|---|---|---|---|---|
| 2014-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2009-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2007-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Tetrachloroethylenecode 2987 | Yes | Resolved |
| 2007-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Tetrachloroethylenecode 2987 | Yes | Resolved |
| 1994-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 8 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.
Elroy Waterworks: frequently asked questions
Who runs Elroy Waterworks?
Elroy Waterworks (PWSID WI7290122) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Elroy Waterworks serve?
Elroy Waterworks reports serving 1,333 people through 647 service connections in Juneau County, Wisconsin.
Where does Elroy 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 Elroy Waterworks have any drinking water violations?
EPA's records list 8 violations for this system; 5 are health-based, and the most recent began in September 2014. 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 Elroy 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. EPA's records list 8 violations for this system; 5 are health-based, and the most recent began in September 2014. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Elroy Waterworks' water quality report?
As a community water system, Elroy 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 Juneau County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mauston Waterworks | Juneau | 4,456 | Community | Groundwater |
| Woodside Sports Complex | Juneau | 3,008 | Transient non-community | Groundwater |
| New Lisbon Waterworks | Juneau | 2,526 | Community | Groundwater |
| Wi Dot Rest Area 9 Lemonweir | Juneau | 2,000 | Transient non-community | Groundwater |
| Wi Dot Rest Area 10 Kildare | Juneau | 2,000 | Transient non-community | Groundwater |
| Necedah Waterworks | Juneau | 844 | 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, “Elroy Waterworks, PWSID WI7290122, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/elroy-waterworks-wi7290122 (data as of October 1, 2026).