Aqua Illinois-willowbrook
EPA ID: IL1977870 · 5,100 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Aqua Illinois-willowbrook (IL1977870): no drinking-water violations recorded since 2021. Although compliance varies widely among water utilities nationally, the SDWIS file for Aqua Illinois-willowbrook lists no EPA violations for this supplier, whose service area covers 5,100 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Aqua Illinois-willowbrook Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Aqua Illinois-willowbrook have a median household income of $93,346 and about 15,408 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 70% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Aqua Illinois-willowbrook'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.
Wastewater Proximity Note: This service area ranks in the 70th percentile nationally for proximity to wastewater discharge points.
Infrastructure Risk
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
Aqua Illinois-willowbrook (EPA ID: IL1977870) is a community water system in Illinois that serves approximately 5,100 people from groundwater sources.
This system serves ZIP code 60417 in Crete.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.001 mg/L | No | 2023-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
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: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
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.
- 60417 - Crete
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Aqua Illinois-willowbrook (IL1977870) on EPA.gov.
Frequently Asked Questions
Is Aqua Illinois-willowbrook water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Aqua Illinois-willowbrook 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 Aqua Illinois-willowbrook serve?
Aqua Illinois-willowbrook serves approximately 5,100 people across 1 ZIP code in Illinois.
Where does Aqua Illinois-willowbrook get its water?
The primary water source is groundwater.
Federal UCMR5 PFAS Monitoring: No PFAS Reported Above Reporting Levels
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were reported above UCMR5 minimum reporting levels.
EPA's April 2024 PFAS rule sets MCLs of 4 ppt for PFOA and PFOS and 10 ppt for PFHxS, PFNA and HFPO-DA (GenX); water systems must comply from 2029. Other PFAS compounds have no individual federal MCL. A state standard is shown only where this system's state has its own enforceable PFAS limit. Detection results are EPA UCMR5 samples, not a measurement at your tap.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Aqua Illinois-willowbrook Water Quality Report, IL. https://zipcheckup.com/water-system/il1977870/
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title = {{Aqua Illinois-willowbrook Water Quality Report, IL}},
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url = {https://zipcheckup.com/water-system/il1977870/}
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