Public water system · IL3120725
ActiveJellystone Park - Milbrook
At a glance
Jellystone Park - Milbrook (PWSID IL3120725) is an active transient non-community water system in Kendall County, Illinois. It reports serving 371 people through 100 service connections. Its primary water source is groundwater, and EPA lists it as under public/private ownership. EPA's records list 8 violations for this system; 1 is health-based, and the most recent began in January 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
371
Service connections
100
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Jellystone Park - Milbrook compare with other water systems in Kendall County?
By EPA's size categories, Jellystone Park - Milbrook 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 0.5% 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 transient non-community water system reports serving 144 people, so Jellystone Park - Milbrook is about 158% above that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Illinois has 1,703 active transient non-community water systems, 44% 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 Jellystone Park - Milbrook?
EPA lists Jellystone Park - Milbrook 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. 4 of the 47 active systems in Kendall County (8.5%) are also under public/private ownership.
Does Jellystone Park - Milbrook have drinking water violations?
EPA's records list 8 violations for this system; 1 is health-based, and the most recent began in January 2022. The violations listed here began between January 2007 and January 2022. By type: 6 monitoring and reporting, 1 required treatment not met and 1 monitoring. The contaminant or rule involved most often is Nitrate (5 of them). EPA lists 8 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2022-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2021-07-01 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2020-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2017-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2007-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 8 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.
Jellystone Park - Milbrook: frequently asked questions
Who runs Jellystone Park - Milbrook?
Jellystone Park - Milbrook (PWSID IL3120725) is a transient non-community water system under public/private ownership. It is regulated by the IL state drinking water program.
How many people does Jellystone Park - Milbrook serve?
Jellystone Park - Milbrook reports serving 371 people through 100 service connections in Kendall County, Illinois.
Where does Jellystone Park - Milbrook 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 Jellystone Park - Milbrook have any drinking water violations?
EPA's records list 8 violations for this system; 1 is health-based, and the most recent began in January 2022. 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 Jellystone Park - Milbrook'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. EPA's records list 8 violations for this system; 1 is health-based, and the most recent began in January 2022. For current results, consult EPA ECHO, or the IL state drinking water program.
Where can I find Jellystone Park - Milbrook's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Jellystone Park - Milbrook is a 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, “Jellystone Park - Milbrook, PWSID IL3120725, Illinois”, https://aquacensus.com/water-systems/illinois/jellystone-park-milbrook-il3120725 (data as of October 1, 2026).