Public water system · IL2030400
ActiveMinonk
At a glance
Minonk (PWSID IL2030400) is an active community water system in Woodford County, Illinois. It reports serving 1,928 people through 988 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, one is health-based, and the most recent began in January 2002.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,928
Service connections
988
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Minonk compare with other water systems in Woodford County?
By EPA's size categories, Minonk is a small system (501 to 3,300 people). Woodford County has 58 active public water systems, and Minonk is the 6th-largest of them by population served. Its population served is about 3.3 times the county average of 585 people per system, and accounts for 5.7% of the 33,910 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 Minonk is well below 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 Minonk?
EPA lists Minonk 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 58 active systems in Woodford County (22%) are also owned by a local government.
Does Minonk have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2002. The violations listed here began between October 1992 and January 2002. By type: 11 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Combined Radium (-226 and -228) (2 of them). 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 |
|---|---|---|---|---|
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Resolved |
| 1996-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1994-10-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1993-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Radium (-226 and -228)code 4010 | Yes | Resolved |
| 1992-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 1992-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbon tetrachloridecode 2982 | No | Resolved |
| 1992-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 1992-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 1992-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 1992-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylbenzenecode 2992 | No | Resolved |
| 1992-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | 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.
Minonk: frequently asked questions
Who runs Minonk?
Minonk (PWSID IL2030400) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Minonk serve?
Minonk reports serving 1,928 people through 988 service connections in Woodford County, Illinois.
Where does Minonk 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 Minonk have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2002. 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 Minonk'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, one is health-based, and the most recent began in January 2002. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find Minonk's water quality report?
As a community water system, Minonk 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 Woodford County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Eureka | Woodford | 5,216 | Community | Groundwater |
| Caterpillar Trail PWD | Woodford | 5,125 | Community | Groundwater |
| Metamora | Woodford | 3,895 | Community | Groundwater |
| El Paso | Woodford | 2,812 | Community | Groundwater |
| Roanoke | Woodford | 2,000 | Community | Groundwater |
| Washburn | Woodford | 1,032 | 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, “Minonk, PWSID IL2030400, Illinois”, https://aquacensus.com/water-systems/illinois/minonk-il2030400 (data as of October 1, 2026).