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Community Water System · PWS WI2650066

Lake Geneva Utility Commission

Lake Geneva, Wisconsin 53147-0187 - drinking water served from groundwater sources to 7,107 people, tracked in EPA SDWIS and UCMR5.

7,107
People served
182
EPA violations
17
Health-based
3 PFAS
UCMR5 result

The verdict

EPA records 182 drinking-water violations at Lake Geneva Utility Commission, 9% of them health-based - above the Wisconsin per-system average, and UCMR5 testing detected 3 PFAS compounds.

182
Total EPA violations on record
9%
Health-based (MCL / treatment failure)
7,107
People served by this system
3
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Lake Geneva Utility Commission

Lake Geneva Utility Commission is a local-owned community water system that delivers drinking water to 7,107 residents in Lake Geneva, Wisconsin (Walworth County) through 2,632 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 182 total violations for this system , of which 17 (9%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 160 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 29 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 3 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 6 ppt (parts per trillion). 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. Statewide, 78 of 202 UCMR5-tested systems have reported PFAS detections (38.6%).

Lake Geneva Utility Commission's 182 violations sit above the Wisconsin average.

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

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

Population Served
7,107
Total Violations
182
Health-Based Violations
17
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
2,632
County
Walworth
School/Daycare
No
MCL Violations
16
Monitoring Violations
160
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 29 2015
Coliform (TCR) MCL 16 2001
Lead and Copper Rule MR 15 2014
Chlorine MR 8 2015
TTHM MR 8 2022
Total Haloacetic Acids (HAA5) MR 8 2022
Nitrate MR 8 2018
trans-1,2-Dichloroethylene MR 4 2018
Styrene MR 4 2018
1,2,4-Trichlorobenzene MR 4 2018
cis-1,2-Dichloroethylene MR 4 2018
Vinyl chloride MR 4 2018
1,1-Dichloroethylene MR 4 2018
CHLOROBENZENE MR 4 2018
1,2-Dichloropropane MR 4 2018
Trichloroethylene MR 4 2018
Tetrachloroethylene MR 4 2018
Toluene MR 4 2018
Ethylbenzene MR 4 2018
DICHLOROMETHANE MR 4 2018
Carbon tetrachloride MR 4 2018
p-Dichlorobenzene MR 4 2018
1,1,2-Trichloroethane MR 4 2018
1,2-Dichloroethane MR 4 2018
Xylenes, Total MR 4 2018
Benzene MR 4 2018
1,1,1-Trichloroethane MR 4 2018
o-Dichlorobenzene MR 4 2018
Public Notice Other 3 2015
Lead and Copper Rule TT 1 1993

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 11 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
PFPeS 9/23/2024 <4.00 ppt 4.00 ppt Not Detected
6:2 FTS 9/23/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 9/23/2024 <5.00 ppt 5.00 ppt Not Detected
PFMPA 9/23/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFBA 9/23/2024 <5.00 ppt 5.00 ppt Not Detected
NFDHA 9/23/2024 <20.00 ppt 20.00 ppt Not Detected
PFTrDA 9/23/2024 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 9/23/2024 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 9/23/2024 <5.00 ppt 5.00 ppt Not Detected
PFTA 9/23/2024 <8.00 ppt 8.00 ppt Not Detected
PFHpS 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFOS 9/23/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpA 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 9/23/2024 <5.00 ppt 5.00 ppt Not Detected
PFNA 9/23/2024 <4.00 ppt 4.00 ppt Not Detected
PFBS 9/23/2024 5.50 ppt 3.00 ppt Detected
PFOA 9/23/2024 <4.00 ppt 4.00 ppt Not Detected
PFDA 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxA 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFUnA 9/23/2024 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 9/23/2024 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 9/23/2024 <2.00 ppt 2.00 ppt Not Detected
ADONA 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 9/23/2024 3.60 ppt 3.00 ppt Detected
4:2 FTS 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 9/23/2024 <5.00 ppt 5.00 ppt Not Detected
PFMPA 9/23/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 9/23/2024 <5.00 ppt 5.00 ppt Not Detected
NFDHA 9/23/2024 <20.00 ppt 20.00 ppt Not Detected
PFPeS 9/23/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpS 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFTA 9/23/2024 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 9/23/2024 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 9/23/2024 <6.00 ppt 6.00 ppt Not Detected
PFBS 9/23/2024 6.00 ppt 3.00 ppt Detected
PFEESA 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFNA 9/23/2024 <4.00 ppt 4.00 ppt Not Detected
NEtFOSAA 9/23/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 9/23/2024 <5.00 ppt 5.00 ppt Not Detected
PFHpA 9/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 9/23/2024 3.50 ppt 3.00 ppt Detected
PFOS 9/23/2024 <4.00 ppt 4.00 ppt Not Detected
PFOA 9/23/2024 4.30 ppt 4.00 ppt 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 Lake Geneva Utility Commission.

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 WI2650066 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 Lake Geneva Utility Commission 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
2022 TTHM MR 8 SDWIS / WI2650066 / 2950
2022 Total Haloacetic Acids (HAA5) MR 8 SDWIS / WI2650066 / 2456
2018 Nitrate MR 8 SDWIS / WI2650066 / 1040
2018 trans-1,2-Dichloroethylene MR 4 SDWIS / WI2650066 / 2979
2018 Styrene MR 4 SDWIS / WI2650066 / 2996
2018 1,2,4-Trichlorobenzene MR 4 SDWIS / WI2650066 / 2378
2018 cis-1,2-Dichloroethylene MR 4 SDWIS / WI2650066 / 2380
2018 Vinyl chloride MR 4 SDWIS / WI2650066 / 2976
2018 1,1-Dichloroethylene MR 4 SDWIS / WI2650066 / 2977
2018 CHLOROBENZENE MR 4 SDWIS / WI2650066 / 2989
2018 1,2-Dichloropropane MR 4 SDWIS / WI2650066 / 2983
2018 Trichloroethylene MR 4 SDWIS / WI2650066 / 2984
2018 Tetrachloroethylene MR 4 SDWIS / WI2650066 / 2987
2018 Toluene MR 4 SDWIS / WI2650066 / 2991
2018 Ethylbenzene MR 4 SDWIS / WI2650066 / 2992

How Lake Geneva Utility Commission Compares

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

Metric Lake Geneva Utility Commission Wisconsin avg Federal benchmark
Total violations 182 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 17 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection 3 compounds 38.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 7,107 467 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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Lake Geneva Utility Commission water safe to drink?
Lake Geneva Utility Commission (PWS ID: WI2650066) has 182 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 3 PFAS compounds found. This system serves 7,107 people using Groundwater sources.
How many people does Lake Geneva Utility Commission serve?
Lake Geneva Utility Commission serves 7,107 people in Lake Geneva, Wisconsin. It is a Local-owned system using Groundwater water sources with 2,632 service connections.
What type of violations does Lake Geneva Utility Commission have?
Lake Geneva Utility Commission has 182 total violations: 17 health-based violations (MCL exceedances or treatment failures), 160 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Lake Geneva Utility Commission water?
Yes. UCMR5 testing detected 3 PFAS compounds in Lake Geneva Utility Commission's water supply: PFBS, PFHxS, PFOA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Lake Geneva Utility Commission use?
Lake Geneva Utility Commission 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.
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.
Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.