Maroa
EPA ID: IL1150300 · 1,700 people served · 2 ZIP codes
ZipCheckup's reading of EPA records for Maroa (IL1150300): no drinking-water violations recorded since 2021. Water monitoring for Maroa: no violations on record, 1,700 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Maroa Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Maroa have a median household income of $89,184 and about 4,738 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 73% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: On average, 41% of census tracts in the counties mapped to this service area are designated disadvantaged by the federal Climate and Economic Justice Screening Tool (CEJST, 2022 version). Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Maroa'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
Maroa (EPA ID: IL1150300) is a community water system in Illinois that serves approximately 1,700 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 |
The accepted LCR snapshot contains 1 reported copper action-level exceedance record for this PWSID. The source does not provide a verified copper level for publication.
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 Maroa (IL1150300) on EPA.gov.
Frequently Asked Questions
Is Maroa water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Maroa 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 Maroa serve?
Maroa serves approximately 1,700 people across 2 ZIP codes in Illinois.
Where does Maroa get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Maroa Water Quality Report, IL. https://zipcheckup.com/water-system/il1150300/
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author = {{ZipCheckup}},
title = {{Maroa Water Quality Report, IL}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/il1150300/}
}