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UNION GROVE WATERWORKS

PWS ID: WI2520200 · UNION GROVE, Wisconsin 53182

UNION GROVE WATERWORKS serves 4,900 people in UNION GROVE, Wisconsin using Groundwater water sources. It has 71 recorded EPA violations, including 35 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: UNION GROVE WATERWORKS

UNION GROVE WATERWORKS is a local-owned community water system that delivers drinking water to 4,900 residents in UNION GROVE, Wisconsin (Racine County) through 1,814 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 71 total violations for this system , of which 35 (49%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 23 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Gross Alpha, Excl. Radon and U, recorded in 17 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 12 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across Wisconsin, EPA tracks 10,988 public water systems serving 5,131,439 people, with 285,161 cumulative violations and 58,688 health-based violations on record. About 72% of systems in the state carry at least one violation, and state-wide the average per system is 26 violations. UNION GROVE WATERWORKS's 71 violations sit above the Wisconsin average. Statewide, 78 of 202 UCMR5-tested systems have reported PFAS detections (38.6%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
4,900
Total Violations
71
Health-Based Violations
35
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,814
County
Racine
School/Daycare
No
MCL Violations
34
Monitoring Violations
23
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Gross Alpha, Excl. Radon and U MCL 17 2007
Combined Radium (-226 and -228) MCL 17 2001
Consumer Confidence Rule Other 10 2011
Mercury MR 9 2002
Gross Alpha, Excl. Radon and U MR 8 2014
Coliform (TCR) MR 4 1994
Public Notice Other 2 2024
Lead and Copper Rule MR 2 2018
LEAD AND COPPER RULE REVISIONS TT 1 2024

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 180 samples detected PFAS.

Contaminant Date Result MRL Status
6:2 FTS 7/8/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 7/8/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 7/8/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 7/8/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 7/8/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 7/8/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 7/8/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 7/8/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 7/8/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 7/8/2024 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 7/8/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 7/8/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 7/8/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 7/8/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 7/8/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 7/8/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 7/8/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 7/8/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 7/8/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 7/8/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 7/8/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFHpS 7/8/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 7/8/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 7/8/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 7/8/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 7/8/2024 <0.006 µg/L 0.006 µg/L Not Detected
lithium 7/8/2024 12.0000 µg/L 9 µg/L Detected
PFHpA 7/8/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 7/8/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/8/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 4/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 4/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 4/17/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 4/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 4/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 4/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 4/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 4/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 4/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
NEtFOSAA 4/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 4/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 4/17/2023 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 4/17/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFTA 4/17/2023 <0.008 µg/L 0.008 µg/L Not Detected
9Cl-PF3ONS 4/17/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFHxS 4/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 4/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 4/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 4/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 4/17/2023 <0.02 µg/L 0.02 µg/L Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for UNION GROVE WATERWORKS.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID WI2520200 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Wisconsin Drinking Water Authority

Wisconsin DNR — Drinking Water and Groundwater is the primacy agency that licenses and inspects UNION GROVE WATERWORKS under EPA-delegated authority.

Open WI regulator portal

Source: Wisconsin DNR — Drinking Water and Groundwater

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Public Notice Other 2 SDWIS / WI2520200 / 7500
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / WI2520200 / 5200
2018 Lead and Copper Rule MR 2 SDWIS / WI2520200 / 5000
2014 Gross Alpha, Excl. Radon and U MR 8 SDWIS / WI2520200 / 4000
2011 Consumer Confidence Rule Other 10 SDWIS / WI2520200 / 7000
2007 Gross Alpha, Excl. Radon and U MCL 17 SDWIS / WI2520200 / 4000
2002 Mercury MR 9 SDWIS / WI2520200 / 1035
2001 Combined Radium (-226 and -228) MCL 17 SDWIS / WI2520200 / 4010
1994 Coliform (TCR) MR 4 SDWIS / WI2520200 / 3100

How UNION GROVE WATERWORKS Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric UNION GROVE WATERWORKS Wisconsin avg Federal benchmark
Total violations 71 26 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 35 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 38.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 4,900 467 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 10,988 regulated public water systems in Wisconsin.

Federal MCL reference — Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is UNION GROVE WATERWORKS water safe to drink? ▼
UNION GROVE WATERWORKS (PWS ID: WI2520200) has 71 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 4,900 people using Groundwater sources.
How many people does UNION GROVE WATERWORKS serve? ▼
UNION GROVE WATERWORKS serves 4,900 people in UNION GROVE, Wisconsin. It is a Local-owned system using Groundwater water sources with 1,814 service connections.
What type of violations does UNION GROVE WATERWORKS have? ▼
UNION GROVE WATERWORKS has 71 total violations: 35 health-based violations (MCL exceedances or treatment failures), 23 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in UNION GROVE WATERWORKS water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in UNION GROVE WATERWORKS's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does UNION GROVE WATERWORKS use? ▼
UNION GROVE WATERWORKS uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial