Northwest Water Commission
EPA ID: IL0315300 · 1 people served · 4 ZIP codes
Federal monitoring spanning five full years has produced zero violations at Northwest Water Commission — a clean record across every reporting cycle for a utility serving approximately 1 resident.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Demographics
The Northwest Water Commission serves a community with a median household income of $84,730 and an estimated 89,822 residents across its service area. Approximately 79% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 46% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. 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?
Northwest Water Commission'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.
About 1% of homes in Cook County, Illinois rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
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
Northwest Water Commission (EPA ID: IL0315300) is a community water system in Illinois that serves approximately 1 people from surface water sources.
This system provides water to 4 ZIP codes across 1 community.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
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
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Northwest Water Commission (IL0315300) on EPA.gov.
Frequently Asked Questions
Is Northwest Water Commission water safe to drink?
Based on EPA records, Northwest Water Commission has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Northwest Water Commission serve?
Northwest Water Commission serves approximately 1 people across 4 ZIP codes in Illinois.
Where does Northwest Water Commission get its water?
The primary water source is surface water.