Oblong
EPA ID: IL0330150 · 2,321 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for Oblong (IL0330150): no EPA violations recorded in the last five years. Over five tracked years, Oblong has stayed completely violation-free for its 2,321 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Oblong Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Oblong serves a community with a median household income of $63,189 and an estimated 13,324 residents across its service area. Approximately 76% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Oblong's water is pumped from underground aquifers. 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.
Wastewater Proximity Note: This service area ranks in the 70th percentile nationally for proximity to wastewater discharge points.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 6 detections recorded. 2 exceed federal EPA limits (4 ppt for PFOA/PFOS).
Comparable Water Systems
Similar-sized systems in Illinois
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Oblong (EPA ID: IL0330150) is a community water system in Illinois that serves approximately 2,321 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 |
|---|---|---|
| 0 mg/L | No | N/A |
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
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
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 the full compliance record for Oblong (IL0330150) on EPA.gov.
Frequently Asked Questions
Is Oblong water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Oblong 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 Oblong serve?
Oblong serves approximately 2,321 people across 2 ZIP codes in Illinois.
Where does Oblong get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Oblong Water Quality Report, IL. https://zipcheckup.com/water-system/il0330150/
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author = {{ZipCheckup}},
title = {{Oblong Water Quality Report, IL}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/il0330150/}
}