Minonk
EPA ID: IL2030400 · 1,928 people served · 2 ZIP codes
ZipCheckup's reading of EPA records for Minonk (IL2030400): no drinking-water violations recorded since 2021. EPA monitoring records reviewed for Minonk list no violations. That describes the federal file only, not a test of the water at any tap, for a utility that reports serving approximately 1,928 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Minonk Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Minonk have a median household income of $77,934 and about 3,056 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 88% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Minonk's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Illinois
System Overview
Minonk (EPA ID: IL2030400) is a community water system in Illinois that serves approximately 1,928 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| Below the reporting limit | No | 2025-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
2 of 2 ZIP records with known zones are in EPA Radon Zone 1.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by IL or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Minonk (IL2030400) on EPA.gov.
Frequently Asked Questions
Is Minonk water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Minonk in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Minonk serve?
Minonk serves approximately 1,928 people across 2 ZIP codes in Illinois.
Where does Minonk get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Minonk Water Quality Report, IL. https://zipcheckup.com/water-system/il2030400/
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author = {{ZipCheckup}},
title = {{Minonk Water Quality Report, IL}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/il2030400/}
}