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Non-Transient Non-Community Water System · PWS WI6630338

DE Soto High-Middle School

DeSoto, Wisconsin 54624 - drinking water served from groundwater sources to 403 people, tracked in EPA SDWIS and UCMR5.

403
People served
185
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 185 drinking-water violations at DE Soto High-Middle School - above the Wisconsin per-system average.

185
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
403
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: DE Soto High-Middle School

DE Soto High-Middle School is a local-owned non-transient non-community water system that delivers drinking water to 403 residents in DeSoto, Wisconsin (Vernon County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 185 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 185 monitoring and reporting violations are on file. The most recent violation on record dates to 2016.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 24 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%).

DE Soto High-Middle School's 185 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
403
Total Violations
185
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
1
County
Vernon
School/Daycare
Yes
MCL Violations
0
Monitoring Violations
185
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 24 2014
Nitrate MR 7 2013
Coliform (TCR) MR 6 1996
Cadmium MR 4 2013
Chromium MR 4 2013
Fluoride MR 4 2013
Mercury MR 4 2013
Nitrite MR 4 2013
Antimony, Total MR 4 2013
Beryllium, Total MR 4 2013
Thallium, Total MR 4 2013
2,4,5-TP MR 4 2013
OXAMYL MR 4 2013
Glyphosate MR 4 2013
2,4-D MR 4 2013
Heptachlor epoxide MR 4 2013
Heptachlor MR 4 2013
Hexachlorocyclopentadiene MR 4 2013
Picloram MR 4 2013
Chlordane MR 4 2013
Endrin MR 4 2013
BHC-GAMMA MR 4 2013
Methoxychlor MR 4 2013
Dalapon MR 4 2013
Diquat MR 4 2013
Revised Total Coliform Rule MON 4 2016
HEXACHLOROBENZENE MR 4 2013
Nickel MR 4 2013
Simazine MR 4 2013
Toxaphene MR 4 2013

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 DE Soto High-Middle 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 WI6630338 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 DE Soto High-Middle 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
2016 Revised Total Coliform Rule MON 4 SDWIS / WI6630338 / 8000
2014 Lead and Copper Rule MR 24 SDWIS / WI6630338 / 5000
2013 Nitrate MR 7 SDWIS / WI6630338 / 1040
2013 Cadmium MR 4 SDWIS / WI6630338 / 1015
2013 Chromium MR 4 SDWIS / WI6630338 / 1020
2013 Fluoride MR 4 SDWIS / WI6630338 / 1025
2013 Mercury MR 4 SDWIS / WI6630338 / 1035
2013 Nitrite MR 4 SDWIS / WI6630338 / 1041
2013 Antimony, Total MR 4 SDWIS / WI6630338 / 1074
2013 Beryllium, Total MR 4 SDWIS / WI6630338 / 1075
2013 Thallium, Total MR 4 SDWIS / WI6630338 / 1085
2013 2,4,5-TP MR 4 SDWIS / WI6630338 / 2110
2013 OXAMYL MR 4 SDWIS / WI6630338 / 2036
2013 Glyphosate MR 4 SDWIS / WI6630338 / 2034
2013 2,4-D MR 4 SDWIS / WI6630338 / 2105

How DE Soto High-Middle School Compares

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

Metric DE Soto High-Middle School Wisconsin avg Federal benchmark
Total violations 185 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 403 467 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 DE Soto High-Middle School water safe to drink? ▼
DE Soto High-Middle School (PWS ID: WI6630338) has 185 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 403 people using Groundwater sources.
How many people does DE Soto High-Middle School serve? ▼
DE Soto High-Middle School serves 403 people in DeSoto, Wisconsin. It is a Local-owned system using Groundwater water sources with 1 service connections.
What type of violations does DE Soto High-Middle School have? ▼
DE Soto High-Middle School has 185 total violations: 0 health-based violations (MCL exceedances or treatment failures), 185 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in DE Soto High-Middle School water? ▼
No PFAS testing data is available for DE Soto High-Middle School under the EPA's UCMR5 monitoring program.
What water source does DE Soto High-Middle School use? ▼
DE Soto High-Middle 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.