Public water system · IL3156695
ActiveTom Dempsey Therapeutic Day School
At a glance
Tom Dempsey Therapeutic Day School (PWSID IL3156695) is an active non-transient non-community water system in Lee County, Illinois. It reports serving 55 people through 9 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in March 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
55
Service connections
9
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Tom Dempsey Therapeutic Day School compare with other water systems in Lee County?
By EPA's size categories, Tom Dempsey Therapeutic Day School is a very small system (500 people or fewer). Lee County has 55 active public water systems. Its population served is well below the county average of 608 people per system, and accounts for 0.2% of the 33,442 people reported by systems filed under the county. Across Illinois, the 3,872 active systems average 3,204 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Tom Dempsey Therapeutic Day School is well below that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Illinois has 396 active non-transient non-community water systems, 10% of the state's 3,872 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,808 Illinois systems (73%) list groundwater as their primary source.
Who owns and regulates Tom Dempsey Therapeutic Day School?
EPA lists Tom Dempsey Therapeutic Day School as privately owned. The IL state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 36 of the 55 active systems in Lee County (65%) are also privately owned.
Does Tom Dempsey Therapeutic Day School have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in March 2025. The violations listed here began between October 2016 and March 2025. By type: 8 monitoring and reporting, 2 required treatment not met, 1 reporting and 1 monitoring. The contaminant or rule involved most often is Lead and Copper Rule (4 of them). EPA lists 8 as resolved and 4 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-03-01 | Required treatment not metPublic Education · code 65 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2024-10-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2020-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2019-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2018-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2016-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Tom Dempsey Therapeutic Day School: frequently asked questions
Who runs Tom Dempsey Therapeutic Day School?
Tom Dempsey Therapeutic Day School (PWSID IL3156695) is a non-transient non-community water system privately owned. It is regulated by the IL state drinking water program.
How many people does Tom Dempsey Therapeutic Day School serve?
Tom Dempsey Therapeutic Day School reports serving 55 people through 9 service connections in Lee County, Illinois.
Where does Tom Dempsey Therapeutic Day School get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Tom Dempsey Therapeutic Day School have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in March 2025. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Tom Dempsey Therapeutic Day School's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in March 2025. For current results, consult EPA ECHO, or the IL state drinking water program.
Where can I find Tom Dempsey Therapeutic Day School's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Tom Dempsey Therapeutic Day School is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Lee County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dixon | Lee | 15,096 | Community | Groundwater |
| Woodhaven | Lee | 4,100 | Community | Groundwater |
| Amboy | Lee | 2,500 | Community | Groundwater |
| Dixon Correctional Center | Lee | 1,038 | Community | Groundwater |
| Il Hwy 39 Willowcreek Sb Rest | Lee | 1,000 | Transient non-community | Groundwater |
| Ashton | Lee | 967 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Tom Dempsey Therapeutic Day School, PWSID IL3156695, Illinois”, https://aquacensus.com/water-systems/illinois/tom-dempsey-therapeutic-day-school-il3156695 (data as of October 1, 2026).