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Non-Transient Non-Community Water System · PWS IL3156695

Tom Dempsey Therapeutic Day School

Dixon, Illinois 61021 - drinking water served from groundwater sources to 55 people, tracked in EPA SDWIS and UCMR5.

55
People served
651
EPA violations
9
Health-based
Untested
UCMR5 result

The verdict

EPA records 651 drinking-water violations at Tom Dempsey Therapeutic Day School, 1% of them health-based - above the Illinois per-system average.

651
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
55
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Tom Dempsey Therapeutic Day School

Tom Dempsey Therapeutic Day School is a private-owned non-transient non-community water system that delivers drinking water to 55 residents in Dixon, Illinois (Lee County) through 9 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 651 total violations for this system , of which 9 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 638 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 Xylenes, Total, recorded in 16 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 Illinois, EPA tracks 5,117 public water systems serving 12,576,876 people, with 355,322 cumulative violations and 52,932 health-based violations on record. About 81% of systems in the state carry at least one violation, and state-wide the average per system is 69.4 violations. Statewide, 199 of 487 UCMR5-tested systems have reported PFAS detections (40.9%).

Tom Dempsey Therapeutic Day School's 651 violations sit above the Illinois 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
55
Total Violations
651
Health-Based Violations
9
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
9
County
Lee
School/Daycare
Yes
MCL Violations
1
Monitoring Violations
638
Treatment Tech Violations
8

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Xylenes, Total MR 16 2014
p-Dichlorobenzene MR 16 2014
1,1-Dichloroethylene MR 16 2014
1,1,1-Trichloroethane MR 16 2014
1,2-Dichloroethane MR 16 2014
Carbon tetrachloride MR 16 2014
1,2-Dichloropropane MR 16 2014
Trichloroethylene MR 16 2014
Benzene MR 16 2014
Toluene MR 16 2014
Ethylbenzene MR 16 2014
1,1,2-Trichloroethane MR 16 2014
Tetrachloroethylene MR 16 2014
CHLOROBENZENE MR 16 2014
1,2,4-Trichlorobenzene MR 16 2014
DICHLOROMETHANE MR 16 2014
o-Dichlorobenzene MR 16 2014
Vinyl chloride MR 16 2014
trans-1,2-Dichloroethylene MR 16 2014
Styrene MR 16 2014
cis-1,2-Dichloroethylene MR 16 2014
ETHYLENE DIBROMIDE MR 13 2014
Chlordane MR 13 2014
BHC-GAMMA MR 13 2014
Methoxychlor MR 13 2014
Carbofuran MR 13 2014
Atrazine MR 13 2014
Heptachlor MR 13 2014
2,4-D MR 13 2014
2,4,5-TP MR 13 2014

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 Tom Dempsey Therapeutic Day 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 IL3156695 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Illinois Drinking Water Authority

Illinois EPA, Bureau of Water is the primacy agency that licenses and inspects Tom Dempsey Therapeutic Day School under EPA-delegated authority.

Open IL regulator portal

Source: Illinois EPA, Bureau of Water

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 4 SDWIS / IL3156695 / 5000
2024 Lead and Copper Rule MR 13 SDWIS / IL3156695 / 5000
2024 LEAD AND COPPER RULE REVISIONS TT 4 SDWIS / IL3156695 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 4 SDWIS / IL3156695 / 5200
2020 Revised Total Coliform Rule MON 3 SDWIS / IL3156695 / 8000
2019 Total Haloacetic Acids (HAA5) MR 3 SDWIS / IL3156695 / 2456
2019 TTHM MR 3 SDWIS / IL3156695 / 2950
2018 Nitrate MR 1 SDWIS / IL3156695 / 1040
2015 Coliform (TCR) MCL 1 SDWIS / IL3156695 / 3100
2014 Xylenes, Total MR 16 SDWIS / IL3156695 / 2955
2014 p-Dichlorobenzene MR 16 SDWIS / IL3156695 / 2969
2014 1,1-Dichloroethylene MR 16 SDWIS / IL3156695 / 2977
2014 1,1,1-Trichloroethane MR 16 SDWIS / IL3156695 / 2981
2014 1,2-Dichloroethane MR 16 SDWIS / IL3156695 / 2980
2014 Carbon tetrachloride MR 16 SDWIS / IL3156695 / 2982

How Tom Dempsey Therapeutic Day School Compares

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

Metric Tom Dempsey Therapeutic Day School Illinois avg Federal benchmark
Total violations 651 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 9 10.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 40.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 55 2,458 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 5,117 regulated public water systems in Illinois.

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 Tom Dempsey Therapeutic Day School water safe to drink? ▼
Tom Dempsey Therapeutic Day School (PWS ID: IL3156695) has 651 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 55 people using Groundwater sources.
How many people does Tom Dempsey Therapeutic Day School serve? ▼
Tom Dempsey Therapeutic Day School serves 55 people in Dixon, Illinois. It is a Private-owned system using Groundwater water sources with 9 service connections.
What type of violations does Tom Dempsey Therapeutic Day School have? ▼
Tom Dempsey Therapeutic Day School has 651 total violations: 9 health-based violations (MCL exceedances or treatment failures), 638 monitoring/reporting violations, and 8 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Tom Dempsey Therapeutic Day School water? ▼
No PFAS testing data is available for Tom Dempsey Therapeutic Day School under the EPA's UCMR5 monitoring program.
What water source does Tom Dempsey Therapeutic Day School use? ▼
Tom Dempsey Therapeutic Day 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.