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Annual Facility Inspection Report

MS4 Stormwater Reports

The Village of Westchester submits annual facility inspection reports to the Illinois Environmental Protection Agency (IEPA) as required under our NPDES Permit for Storm Water Discharges from Separate Storm Sewer Systems (MS4).

Annual Reports

📄 MS4 Report - 2025-2026Most Recent 📄 MS4 Report - 2024-2025 📄 MS4 Report - 2023-2024 📄 MS4 Report - 2022-2023

What is MS4?

A Municipal Separate Storm Sewer System (MS4) is a publicly-owned conveyance system designed to collect and transport stormwater runoff. These reports document our stormwater management activities and compliance efforts.

Questions?

Contact Public Works at (708) 345-0020

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Chester
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