Public water system · IL3091751
ActiveCaledonia School
At a glance
Caledonia School (PWSID IL3091751) is an active non-transient non-community water system in Boone County, Illinois. It reports serving 750 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as under public/private ownership. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in March 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
750
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Caledonia School compare with other water systems in Boone County?
By EPA's size categories, Caledonia School is a small system (501 to 3,300 people). Boone County has 47 active public water systems. Its population served is about 20% below the county average of 939 people per system, and accounts for 1.7% of the 44,134 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 Caledonia School is about 74% above 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 Caledonia School?
EPA lists Caledonia School as under public/private ownership. 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. 6 of the 47 active systems in Boone County (13%) are also under public/private ownership.
Does Caledonia School have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in March 2026. The violations listed here began between January 2025 and March 2026. By type: 11 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are Public Notice, Styrene, Trichloroethylene and Nitrate. EPA lists 11 as archived and 1 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2026-03-07 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | p-Dichlorobenzenecode 2969 | No | Archived |
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.
Caledonia School: frequently asked questions
Who runs Caledonia School?
Caledonia School (PWSID IL3091751) is a non-transient non-community water system under public/private ownership. It is regulated by the IL state drinking water program.
How many people does Caledonia School serve?
Caledonia School reports serving 750 people through 1 service connection in Boone County, Illinois.
Where does Caledonia 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 Caledonia School have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in March 2026. 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 Caledonia 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, none is health-based, and the most recent began in March 2026. For current results, consult EPA ECHO, or the IL state drinking water program.
Where can I find Caledonia School's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Caledonia 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 Boone County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Belvidere | Boone | 25,339 | Community | Groundwater |
| Aqua Illinois-Candlewick Dvn | Boone | 6,426 | Community | Groundwater |
| Poplar Grove | Boone | 2,372 | Community | Groundwater |
| Poplar Grove South | Boone | 1,877 | Community | Groundwater |
| Capron | Boone | 1,343 | Community | Groundwater |
| Poplar Grove West-Countryside | Boone | 790 | 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, “Caledonia School, PWSID IL3091751, Illinois”, https://aquacensus.com/water-systems/illinois/caledonia-school-il3091751 (data as of October 1, 2026).