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Non-Transient Non-Community Water System · PWS WI2520361

Yorkville School

Union Grove, Wisconsin 53182 - drinking water served from groundwater sources to 561 people, tracked in EPA SDWIS and UCMR5.

561
People served
215
EPA violations
14
Health-based
Untested
UCMR5 result

The verdict

EPA records 215 drinking-water violations at Yorkville School, 7% of them health-based - above the Wisconsin per-system average.

215
Total EPA violations on record
7%
Health-based (MCL / treatment failure)
561
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Yorkville School

Yorkville School is a private-owned non-transient non-community water system that delivers drinking water to 561 residents in Union Grove, Wisconsin (Racine County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 215 total violations for this system , of which 14 (7%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 200 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 14 violations (MCL, 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%).

Yorkville School's 215 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
561
Total Violations
215
Health-Based Violations
14
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Racine
School/Daycare
Yes
MCL Violations
14
Monitoring Violations
200
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 14 2003
cis-1,2-Dichloroethylene MR 9 2008
Xylenes, Total MR 9 2008
DICHLOROMETHANE MR 9 2008
o-Dichlorobenzene MR 9 2008
p-Dichlorobenzene MR 9 2008
1,2-Dichloroethane MR 9 2008
1,1,1-Trichloroethane MR 9 2008
Carbon tetrachloride MR 9 2008
1,1,2-Trichloroethane MR 9 2008
CHLOROBENZENE MR 9 2008
Benzene MR 9 2008
Toluene MR 9 2008
Ethylbenzene MR 9 2008
1,1-Dichloroethylene MR 9 2008
trans-1,2-Dichloroethylene MR 9 2008
1,2-Dichloropropane MR 9 2008
Trichloroethylene MR 9 2008
Tetrachloroethylene MR 9 2008
Styrene MR 9 2008
1,2,4-Trichlorobenzene MR 9 2008
Vinyl chloride MR 9 2008
Revised Total Coliform Rule MON 8 2025
Coliform (TCR) MR 3 1995
Public Notice Other 1 2008

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 Yorkville School.

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 WI2520361 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 Yorkville School 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
2025 Revised Total Coliform Rule MON 8 SDWIS / WI2520361 / 8000
2008 cis-1,2-Dichloroethylene MR 9 SDWIS / WI2520361 / 2380
2008 Xylenes, Total MR 9 SDWIS / WI2520361 / 2955
2008 DICHLOROMETHANE MR 9 SDWIS / WI2520361 / 2964
2008 o-Dichlorobenzene MR 9 SDWIS / WI2520361 / 2968
2008 p-Dichlorobenzene MR 9 SDWIS / WI2520361 / 2969
2008 1,2-Dichloroethane MR 9 SDWIS / WI2520361 / 2980
2008 1,1,1-Trichloroethane MR 9 SDWIS / WI2520361 / 2981
2008 Carbon tetrachloride MR 9 SDWIS / WI2520361 / 2982
2008 1,1,2-Trichloroethane MR 9 SDWIS / WI2520361 / 2985
2008 CHLOROBENZENE MR 9 SDWIS / WI2520361 / 2989
2008 Benzene MR 9 SDWIS / WI2520361 / 2990
2008 Toluene MR 9 SDWIS / WI2520361 / 2991
2008 Ethylbenzene MR 9 SDWIS / WI2520361 / 2992
2008 1,1-Dichloroethylene MR 9 SDWIS / WI2520361 / 2977

How Yorkville School Compares

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

Metric Yorkville School Wisconsin avg Federal benchmark
Total violations 215 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 14 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 561 467 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 Yorkville School water safe to drink? ▼
Yorkville School (PWS ID: WI2520361) has 215 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 561 people using Groundwater sources.
How many people does Yorkville School serve? ▼
Yorkville School serves 561 people in Union Grove, Wisconsin. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Yorkville School have? ▼
Yorkville School has 215 total violations: 14 health-based violations (MCL exceedances or treatment failures), 200 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Yorkville School water? ▼
No PFAS testing data is available for Yorkville School under the EPA's UCMR5 monitoring program.
What water source does Yorkville School use? ▼
Yorkville School uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.