Public water system · IL3016964
ActiveMillbrook Junior High
At a glance
Millbrook Junior High (PWSID IL3016964) is an active non-transient non-community water system in Kendall County, Illinois. It reports serving 200 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
200
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Millbrook Junior High compare with other water systems in Kendall County?
By EPA's size categories, Millbrook Junior High is a very small system (500 people or fewer). Kendall County has 47 active public water systems. Its population served is well below the county average of 1,747 people per system, and accounts for 0.2% of the 82,105 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 Millbrook Junior High is about half of 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 Millbrook Junior High?
EPA lists Millbrook Junior High as owned by a local government. 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. 9 of the 47 active systems in Kendall County (19%) are also owned by a local government.
Does Millbrook Junior High have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2025. The violations listed here began between January 2025 and January 2025. By type: 12 monitoring and reporting. The contaminants or rules involved are 1,2-Dichloropropane, Ethylbenzene, 1,1,2-Trichloroethane and Chlorobenzene. EPA lists 12 as archived. 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 |
|---|---|---|---|---|
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylbenzenecode 2992 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,2-Trichloroethanecode 2985 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | 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.
Millbrook Junior High: frequently asked questions
Who runs Millbrook Junior High?
Millbrook Junior High (PWSID IL3016964) is a non-transient non-community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Millbrook Junior High serve?
Millbrook Junior High reports serving 200 people through 1 service connection in Kendall County, Illinois.
Where does Millbrook Junior High 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 Millbrook Junior High 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 January 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 Millbrook Junior High'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 January 2025. For current results, consult EPA ECHO, or the IL state drinking water program.
Where can I find Millbrook Junior High's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Millbrook Junior High 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 Kendall County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Oswego | Kendall | 38,169 | Community | Groundwater |
| Yorkville | Kendall | 23,000 | Community | Groundwater |
| Plano | Kendall | 12,600 | Community | Groundwater |
| Il American-Valley Marina | Kendall | 1,102 | Community | Groundwater |
| Newark | Kendall | 986 | Community | Groundwater |
| Silver Springs State Park (94185) | Kendall | 750 | Transient non-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, “Millbrook Junior High, PWSID IL3016964, Illinois”, https://aquacensus.com/water-systems/illinois/millbrook-junior-high-il3016964 (data as of October 1, 2026).