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Non-Transient Non-Community Water System · PWS WI2460218

Little Red School House

Kewaskum, Wisconsin 53040 - drinking water served from groundwater sources to 75 people, tracked in EPA SDWIS and UCMR5.

75
People served
445
EPA violations
16
Health-based
Untested
UCMR5 result

The verdict

EPA records 445 drinking-water violations at Little Red School House, 4% of them health-based - above the Wisconsin per-system average.

445
Total EPA violations on record
4%
Health-based (MCL / treatment failure)
75
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Little Red School House

Little Red School House is a private-owned non-transient non-community water system that delivers drinking water to 75 residents in Kewaskum, Wisconsin (Ozaukee County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 445 total violations for this system , of which 16 (4%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 429 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 31 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, 51 of 202 UCMR5-tested systems have reported PFAS detections (25.2%).

Little Red School House's 445 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
75
Total Violations
445
Health-Based Violations
16
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Ozaukee
School/Daycare
Yes
MCL Violations
16
Monitoring Violations
429
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 31 2011
Coliform (TCR) MCL 16 2012
2,4-D MR 10 1995
Total Polychlorinated Biphenyls (PCB) MR 10 1995
OXAMYL MR 10 1995
Dalapon MR 10 1995
Methoxychlor MR 10 1995
Endrin MR 10 1995
Heptachlor epoxide MR 10 1995
LASSO MR 10 1995
Aldicarb MR 10 1995
Carbofuran MR 10 1995
Aldicarb sulfone MR 10 1995
Dinoseb MR 10 1995
Picloram MR 10 1995
Chlordane MR 10 1995
Pentachlorophenol MR 10 1995
2,4,5-TP MR 10 1995
Hexachlorocyclopentadiene MR 10 1995
Aldicarb sulfoxide MR 10 1995
Simazine MR 10 1995
BHC-GAMMA MR 10 1995
HEXACHLOROBENZENE MR 10 1995
Toxaphene MR 10 1995
Heptachlor MR 10 1995
Atrazine MR 10 1995
Barium MR 5 1995
Cadmium MR 5 1995
Mercury MR 5 1995
Nitrite MR 5 1995

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 Little Red School House.

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 WI2460218 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 Little Red School House 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 Revised Total Coliform Rule MON 1 SDWIS / WI2460218 / 8000
2012 Coliform (TCR) MCL 16 SDWIS / WI2460218 / 3100
2012 Lead and Copper Rule MR 2 SDWIS / WI2460218 / 5000
2011 Coliform (TCR) MR 31 SDWIS / WI2460218 / 3100
1995 2,4-D MR 10 SDWIS / WI2460218 / 2105
1995 Total Polychlorinated Biphenyls (PCB) MR 10 SDWIS / WI2460218 / 2383
1995 OXAMYL MR 10 SDWIS / WI2460218 / 2036
1995 Dalapon MR 10 SDWIS / WI2460218 / 2031
1995 Methoxychlor MR 10 SDWIS / WI2460218 / 2015
1995 Endrin MR 10 SDWIS / WI2460218 / 2005
1995 Heptachlor epoxide MR 10 SDWIS / WI2460218 / 2067
1995 LASSO MR 10 SDWIS / WI2460218 / 2051
1995 Aldicarb MR 10 SDWIS / WI2460218 / 2047
1995 Carbofuran MR 10 SDWIS / WI2460218 / 2046
1995 Aldicarb sulfone MR 10 SDWIS / WI2460218 / 2044

How Little Red School House Compares

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

Metric Little Red School House Wisconsin avg Federal benchmark
Total violations 445 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 16 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 75 467 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 Little Red School House water safe to drink? ▼
Little Red School House (PWS ID: WI2460218) has 445 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 75 people using Groundwater sources.
How many people does Little Red School House serve? ▼
Little Red School House serves 75 people in Kewaskum, Wisconsin. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Little Red School House have? ▼
Little Red School House has 445 total violations: 16 health-based violations (MCL exceedances or treatment failures), 429 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Little Red School House water? ▼
No PFAS testing data is available for Little Red School House under the EPA's UCMR5 monitoring program.
What water source does Little Red School House use? ▼
Little Red School House 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.