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Community Water System · PWS WI4600437

Cedar Grove Waterworks

Cedar Grove, Wisconsin 53013 - drinking water served from groundwater sources to 2,213 people, tracked in EPA SDWIS and UCMR5.

2,213
People served
84
EPA violations
5
Health-based
Untested
UCMR5 result

The verdict

EPA records 84 drinking-water violations at Cedar Grove Waterworks, 6% of them health-based - above the Wisconsin per-system average.

84
Total EPA violations on record
6%
Health-based (MCL / treatment failure)
2,213
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Cedar Grove Waterworks

Cedar Grove Waterworks is a local-owned community water system that delivers drinking water to 2,213 residents in Cedar Grove, Wisconsin (Sheboygan County) through 819 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 84 total violations for this system , of which 5 (6%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 76 monitoring and reporting violations are on file. The most recent violation on record dates to 2014.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 20 violations (MR). 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%).

Cedar Grove Waterworks's 84 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
2,213
Total Violations
84
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
819
County
Sheboygan
School/Daycare
No
MCL Violations
5
Monitoring Violations
76
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 20 2014
Total Haloacetic Acids (HAA5) MR 5 2014
Coliform (TCR) MCL 5 1997
TTHM MR 5 2014
2,3,7,8-TCDD MR 4 1999
1,2,4-Trichlorobenzene MR 2 1996
Xylenes, Total MR 2 1996
1,1-Dichloroethylene MR 2 1996
1,1,1-Trichloroethane MR 2 1996
Carbon tetrachloride MR 2 1996
Tetrachloroethylene MR 2 1996
CHLOROBENZENE MR 2 1996
cis-1,2-Dichloroethylene MR 2 1996
trans-1,2-Dichloroethylene MR 2 1996
Trichloroethylene MR 2 1996
Vinyl chloride MR 2 1996
1,2-Dichloroethane MR 2 1996
Styrene MR 2 1996
DICHLOROMETHANE MR 2 1996
Benzene MR 2 1996
Toluene MR 2 1996
Ethylbenzene MR 2 1996
p-Dichlorobenzene MR 2 1996
1,1,2-Trichloroethane MR 2 1996
o-Dichlorobenzene MR 2 1996
1,2-Dichloropropane MR 2 1996

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 Cedar 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 WI4600437 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 Cedar 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
2014 Lead and Copper Rule MR 20 SDWIS / WI4600437 / 5000
2014 Total Haloacetic Acids (HAA5) MR 5 SDWIS / WI4600437 / 2456
2014 TTHM MR 5 SDWIS / WI4600437 / 2950
1999 2,3,7,8-TCDD MR 4 SDWIS / WI4600437 / 2063
1997 Coliform (TCR) MCL 5 SDWIS / WI4600437 / 3100
1996 1,2,4-Trichlorobenzene MR 2 SDWIS / WI4600437 / 2378
1996 Xylenes, Total MR 2 SDWIS / WI4600437 / 2955
1996 1,1-Dichloroethylene MR 2 SDWIS / WI4600437 / 2977
1996 1,1,1-Trichloroethane MR 2 SDWIS / WI4600437 / 2981
1996 Carbon tetrachloride MR 2 SDWIS / WI4600437 / 2982
1996 Tetrachloroethylene MR 2 SDWIS / WI4600437 / 2987
1996 CHLOROBENZENE MR 2 SDWIS / WI4600437 / 2989
1996 cis-1,2-Dichloroethylene MR 2 SDWIS / WI4600437 / 2380
1996 trans-1,2-Dichloroethylene MR 2 SDWIS / WI4600437 / 2979
1996 Trichloroethylene MR 2 SDWIS / WI4600437 / 2984

How Cedar Grove Waterworks Compares

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

Metric Cedar Grove Waterworks Wisconsin avg Federal benchmark
Total violations 84 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 5 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 2,213 467 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 Cedar Grove Waterworks water safe to drink? ▼
Cedar Grove Waterworks (PWS ID: WI4600437) has 84 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,213 people using Groundwater sources.
How many people does Cedar Grove Waterworks serve? ▼
Cedar Grove Waterworks serves 2,213 people in Cedar Grove, Wisconsin. It is a Local-owned system using Groundwater water sources with 819 service connections.
What type of violations does Cedar Grove Waterworks have? ▼
Cedar Grove Waterworks has 84 total violations: 5 health-based violations (MCL exceedances or treatment failures), 76 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Cedar Grove Waterworks water? ▼
No PFAS testing data is available for Cedar Grove Waterworks under the EPA's UCMR5 monitoring program.
What water source does Cedar Grove Waterworks use? ▼
Cedar 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.
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.