Public water system · WI2520200
ActiveUnion Grove Waterworks
At a glance
Union Grove Waterworks (PWSID WI2520200) is an active community water system in Racine County, Wisconsin. It reports serving 4,900 people through 1,814 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, 2 are health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,900
Service connections
1,814
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Union Grove Waterworks compare with other water systems in Racine County?
By EPA's size categories, Union Grove Waterworks is a medium system (3,301 to 10,000 people). Racine County has 194 active public water systems, and Union Grove Waterworks is the 5th-largest of them by population served. Its population served is about 5.3 times the county average of 931 people per system, and accounts for 2.7% of the 180,595 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 Union Grove Waterworks is about 27% 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 Union Grove Waterworks?
EPA lists Union Grove 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. 33 of the 194 active systems in Racine County (17%) are also owned by a local government.
Does Union Grove Waterworks have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in October 2024. The violations listed here began between March 2002 and October 2024. By type: 6 monitoring and reporting, 4 public notice, recordkeeping or other, 1 required treatment not met and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Gross alpha (excluding radon and uranium) (3 of them). EPA lists 11 as resolved and 1 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2024-10-17 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2018-01-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2014-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 2014-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 2011-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2011-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2008-01-27 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2007-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Gross alpha (excluding radon and uranium)code 4000 | Yes | Resolved |
| 2002-03-13 | Monitoring and reportingMonitoring, Check/Repeat/Confirmation · code 04 | Mercurycode 1035 | No | Resolved |
| 2002-03-13 | Monitoring and reportingMonitoring, Check/Repeat/Confirmation · code 04 | Mercurycode 1035 | No | Resolved |
| 2002-03-13 | Monitoring and reportingMonitoring, Check/Repeat/Confirmation · code 04 | Mercurycode 1035 | 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.
Union Grove Waterworks: frequently asked questions
Who runs Union Grove Waterworks?
Union Grove Waterworks (PWSID WI2520200) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Union Grove Waterworks serve?
Union Grove Waterworks reports serving 4,900 people through 1,814 service connections in Racine County, Wisconsin.
Where does Union Grove 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 Union Grove Waterworks have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in October 2024. 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 Union Grove 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, 2 are health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Union Grove Waterworks' water quality report?
As a community water system, Union Grove 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 Racine County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Racine Waterworks | Racine | 105,100 | Community | Surface water |
| Caledonia Water Utility - Village of | Racine | 21,819 | Community | Purchased surface water |
| Burlington Waterworks | Racine | 11,043 | Community | Groundwater |
| Waterford Waterworks | Racine | 5,368 | Community | Groundwater |
| Yorkville Utility Dist 1 | Racine | 3,900 | Non-transient non-community | Groundwater |
| Wind Point Water Dept | Racine | 1,804 | Community | Purchased surface water |
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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, “Union Grove Waterworks, PWSID WI2520200, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/union-grove-waterworks-wi2520200 (data as of October 1, 2026).