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Community Water System · PWS WI2650058

Genoa City Waterworks

Genoa City, Wisconsin 53128 - drinking water served from groundwater sources to 2,766 people, tracked in EPA SDWIS and UCMR5.

2,766
People served
248
EPA violations
72
Health-based
Untested
UCMR5 result

The verdict

EPA records 248 drinking-water violations at Genoa City Waterworks, 29% of them health-based - above the Wisconsin per-system average.

248
Total EPA violations on record
29%
Health-based (MCL / treatment failure)
2,766
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Genoa City Waterworks

Genoa City Waterworks is a local-owned community water system that delivers drinking water to 2,766 residents in Genoa City, Wisconsin (Walworth County) through 1,024 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 248 total violations for this system , of which 72 (29%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 143 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 42 violations (TT, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

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%).

Genoa City Waterworks's 248 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.

Population Served
2,766
Total Violations
248
Health-Based Violations
72
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,024
County
Walworth
School/Daycare
No
MCL Violations
30
Monitoring Violations
143
Treatment Tech Violations
42

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule TT 42 2018
Lead and Copper Rule MR 42 2022
Combined Radium (-226 and -228) MCL 25 2011
Public Notice Other 23 2016
Coliform (TCR) MR 9 1999
Coliform (TCR) MCL 5 1994
Nitrate MR 4 1993
Xylenes, Total MR 4 1993
DICHLOROMETHANE MR 4 1993
p-Dichlorobenzene MR 4 1993
Vinyl chloride MR 4 1993
1,1-Dichloroethylene MR 4 1993
trans-1,2-Dichloroethylene MR 4 1993
1,1,1-Trichloroethane MR 4 1993
Carbon tetrachloride MR 4 1993
Tetrachloroethylene MR 4 1993
CHLOROBENZENE MR 4 1993
Benzene MR 4 1993
Toluene MR 4 1993
Styrene MR 4 1993
o-Dichlorobenzene MR 4 1993
1,2-Dichloroethane MR 4 1993
Trichloroethylene MR 4 1993
1,1,2-Trichloroethane MR 4 1993
Ethylbenzene MR 4 1993
Chlorine MR 4 2022
cis-1,2-Dichloroethylene MR 4 1993
1,2-Dichloropropane MR 4 1993
Consumer Confidence Rule Other 3 2002
TTHM MR 2 2023

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 Genoa City 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 WI2650058 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 Genoa City 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
2023 TTHM MR 2 SDWIS / WI2650058 / 2950
2023 Total Haloacetic Acids (HAA5) MR 2 SDWIS / WI2650058 / 2456
2022 Lead and Copper Rule MR 42 SDWIS / WI2650058 / 5000
2022 Chlorine MR 4 SDWIS / WI2650058 / 0999
2018 Lead and Copper Rule TT 42 SDWIS / WI2650058 / 5000
2016 Public Notice Other 23 SDWIS / WI2650058 / 7500
2011 Combined Radium (-226 and -228) MCL 25 SDWIS / WI2650058 / 4010
2002 Consumer Confidence Rule Other 3 SDWIS / WI2650058 / 7000
1999 Coliform (TCR) MR 9 SDWIS / WI2650058 / 3100
1994 Coliform (TCR) MCL 5 SDWIS / WI2650058 / 3100
1993 Nitrate MR 4 SDWIS / WI2650058 / 1040
1993 Xylenes, Total MR 4 SDWIS / WI2650058 / 2955
1993 DICHLOROMETHANE MR 4 SDWIS / WI2650058 / 2964
1993 p-Dichlorobenzene MR 4 SDWIS / WI2650058 / 2969
1993 Vinyl chloride MR 4 SDWIS / WI2650058 / 2976

How Genoa City Waterworks Compares

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

Metric Genoa City Waterworks Wisconsin avg Federal benchmark
Total violations 248 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 72 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 38.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 2,766 467 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 Genoa City Waterworks water safe to drink? ▼
Genoa City Waterworks (PWS ID: WI2650058) has 248 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,766 people using Groundwater sources.
How many people does Genoa City Waterworks serve? ▼
Genoa City Waterworks serves 2,766 people in Genoa City, Wisconsin. It is a Local-owned system using Groundwater water sources with 1,024 service connections.
What type of violations does Genoa City Waterworks have? ▼
Genoa City Waterworks has 248 total violations: 72 health-based violations (MCL exceedances or treatment failures), 143 monitoring/reporting violations, and 42 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Genoa City Waterworks water? ▼
No PFAS testing data is available for Genoa City Waterworks under the EPA's UCMR5 monitoring program.
What water source does Genoa City Waterworks use? ▼
Genoa City 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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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

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.