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Non-Transient Non-Community Water System · PWS WI2670394

Richfield Square

Slinger, Wisconsin 53086 - drinking water served from groundwater sources to 155 people, tracked in EPA SDWIS and UCMR5.

155
People served
116
EPA violations
7
Health-based
Untested
UCMR5 result

The verdict

EPA records 116 drinking-water violations at Richfield Square, 6% of them health-based - above the Wisconsin per-system average.

116
Total EPA violations on record
6%
Health-based (MCL / treatment failure)
155
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Richfield Square

Richfield Square is a private-owned non-transient non-community water system that delivers drinking water to 155 residents in Slinger, Wisconsin (Washington County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 116 total violations for this system , of which 7 (6%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 103 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 Lead and Copper Rule, recorded in 7 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, 51 of 202 UCMR5-tested systems have reported PFAS detections (25.2%).

Richfield Square's 116 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
155
Total Violations
116
Health-Based Violations
7
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Washington
School/Daycare
No
MCL Violations
0
Monitoring Violations
103
Treatment Tech Violations
7

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule TT 7 2025
Public Notice Other 5 2025
cis-1,2-Dichloroethylene MR 5 1993
trans-1,2-Dichloroethylene MR 5 1993
Carbon tetrachloride MR 5 1993
Trichloroethylene MR 5 1993
CHLOROBENZENE MR 5 1993
Benzene MR 5 1993
Tetrachloroethylene MR 5 1993
1,1,1-Trichloroethane MR 5 1993
p-Dichlorobenzene MR 5 1993
1,2-Dichloroethane MR 5 1993
Xylenes, Total MR 5 1993
Vinyl chloride MR 5 1993
1,2-Dichloropropane MR 5 1993
1,1-Dichloroethylene MR 5 1993
o-Dichlorobenzene MR 5 1993
Coliform (TCR) MR 4 1992
Styrene MR 4 1993
Toluene MR 4 1993
DICHLOROMETHANE MR 4 1993
Ethylbenzene MR 4 1993
1,1,2-Trichloroethane MR 4 1993
Revised Total Coliform Rule MON 3 2024
ETHYLENE DIBROMIDE MR 1 1993

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 Richfield Square.

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 WI2670394 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 Richfield Square 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 Lead and Copper Rule TT 7 SDWIS / WI2670394 / 5000
2025 Public Notice Other 5 SDWIS / WI2670394 / 7500
2024 Revised Total Coliform Rule MON 3 SDWIS / WI2670394 / 8000
1993 cis-1,2-Dichloroethylene MR 5 SDWIS / WI2670394 / 2380
1993 trans-1,2-Dichloroethylene MR 5 SDWIS / WI2670394 / 2979
1993 Carbon tetrachloride MR 5 SDWIS / WI2670394 / 2982
1993 Trichloroethylene MR 5 SDWIS / WI2670394 / 2984
1993 CHLOROBENZENE MR 5 SDWIS / WI2670394 / 2989
1993 Benzene MR 5 SDWIS / WI2670394 / 2990
1993 Tetrachloroethylene MR 5 SDWIS / WI2670394 / 2987
1993 1,1,1-Trichloroethane MR 5 SDWIS / WI2670394 / 2981
1993 p-Dichlorobenzene MR 5 SDWIS / WI2670394 / 2969
1993 1,2-Dichloroethane MR 5 SDWIS / WI2670394 / 2980
1993 Xylenes, Total MR 5 SDWIS / WI2670394 / 2955
1993 Vinyl chloride MR 5 SDWIS / WI2670394 / 2976

How Richfield Square Compares

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

Metric Richfield Square Wisconsin avg Federal benchmark
Total violations 116 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 7 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 25.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 155 467 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 Richfield Square water safe to drink? ▼
Richfield Square (PWS ID: WI2670394) has 116 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 155 people using Groundwater sources.
How many people does Richfield Square serve? ▼
Richfield Square serves 155 people in Slinger, Wisconsin. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Richfield Square have? ▼
Richfield Square has 116 total violations: 7 health-based violations (MCL exceedances or treatment failures), 103 monitoring/reporting violations, and 7 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Richfield Square water? ▼
No PFAS testing data is available for Richfield Square under the EPA's UCMR5 monitoring program.
What water source does Richfield Square use? ▼
Richfield Square 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.