Public water system · IL1430200
ActiveChillicothe
At a glance
Chillicothe (PWSID IL1430200) is an active community water system in Peoria County, Illinois. It reports serving 6,660 people through 2,960 service connections. 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 July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
6,660
Service connections
2,960
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Chillicothe compare with other water systems in Peoria County?
By EPA's size categories, Chillicothe is a medium system (3,301 to 10,000 people). Peoria County has 66 active public water systems, and Chillicothe is the 3rd-largest of them by population served. Its population served is about 133% above the county average of 2,857 people per system, and accounts for 3.5% of the 188,545 people reported by systems filed under the county. Across Illinois, the 3,872 active systems average 3,204 people each. Nationally, the average active community water system reports serving 6,703 people, so Chillicothe is roughly in line with that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Illinois has 1,773 active community water systems, 46% 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 Chillicothe?
EPA lists Chillicothe 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. 13 of the 66 active systems in Peoria County (20%) are also owned by a local government.
Does Chillicothe have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2025. The violations listed here began between July 2022 and July 2025. By type: 9 monitoring and reporting, 1 reporting, 1 monitoring and 1 public notice, recordkeeping or other. The contaminants or rules involved are Lead and Copper Rule Revisions, Chlorine, Revised Total Coliform Rule and Total trihalomethanes (TTHM). EPA lists 12 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 |
|---|---|---|---|---|
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2025-05-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2025-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2024-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2023-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2023-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Di(2-ethylhexyl) phthalatecode 2039 | No | Resolved |
| 2022-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Resolved |
| 2022-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 2022-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylbenzenecode 2992 | No | Resolved |
| 2022-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2022-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 2022-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | 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.
Chillicothe: frequently asked questions
Who runs Chillicothe?
Chillicothe (PWSID IL1430200) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Chillicothe serve?
Chillicothe reports serving 6,660 people through 2,960 service connections in Peoria County, Illinois.
Where does Chillicothe 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 Chillicothe 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 July 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 Chillicothe'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 July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find Chillicothe's water quality report?
As a community water system, Chillicothe must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Peoria County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Il American-Peoria | Peoria | 137,575 | Community | Surface water |
| Osf St Francis Hospital | Peoria | 10,000 | Non-transient non-community | Purchased surface water |
| Peoria Heights | Peoria | 5,908 | Community | Groundwater |
| Pleasant Valley PWD | Peoria | 3,783 | Community | Groundwater |
| Cat Mossville | Peoria | 3,000 | Non-transient non-community | Groundwater |
| T-L Rural Water District | Peoria | 2,243 | Community | Purchased 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, “Chillicothe, PWSID IL1430200, Illinois”, https://aquacensus.com/water-systems/illinois/chillicothe-il1430200 (data as of October 1, 2026).