Willowbrook Water Supply District
EPA ID: CO0130843 · 9,348 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for Willowbrook Water Supply District (CO0130843): no EPA violations recorded in the last five years. With a five-year violation-free history, Willowbrook Water Supply District delivers safe water to 9,348 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Willowbrook Water Supply District Source: EPA SDWIS service area boundaries.
Service area boundary - Grade D
Service Area Demographics
The Willowbrook Water Supply District serves a community with a median household income of $134,104 and an estimated 60,103 residents across its service area. Approximately 49% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Willowbrook Water Supply District's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 2 detections recorded.
Comparable Water Systems
Similar-sized systems in Colorado
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
Willowbrook Water Supply District (EPA ID: CO0130843) is a community water system in Colorado that serves approximately 9,348 people from surface water sources.
This system provides water to 2 ZIP codes across 2 communities.
ZIP-Area Home Safety Context: D (50/100)
This is the average Home Safety Score for 1 of 2 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.
Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.
Violation History
Lead & Copper
No reported lead measurement appears for this PWSID in the accepted LCR snapshot. Absence of a reported measurement is not a measured zero.
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 1 (High 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 CO 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 Willowbrook Water Supply District (CO0130843) on EPA.gov.
Frequently Asked Questions
Is Willowbrook Water Supply District water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Willowbrook Water Supply District 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 Willowbrook Water Supply District serve?
Willowbrook Water Supply District serves approximately 9,348 people across 2 ZIP codes in Colorado.
Where does Willowbrook Water Supply District get its water?
The primary water source is surface water.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Willowbrook Water Supply District Water Quality Report, CO. https://zipcheckup.com/water-system/co0130843/
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author = {{ZipCheckup}},
title = {{Willowbrook Water Supply District Water Quality Report, CO}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/co0130843/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Willowbrook Water Supply District (EPA ID: CO0130843) - request the latest Consumer Confidence Report or ask about specific contaminants.