Water Quality

Best Management Practice Information

City staff will periodically post documents and links in this section with tips for residents to help improve the water quality in the runoff from their properties.

Please be mindful of how your lawn is treated for weeds and fertilizers, as chemical treatments contribute pollutants into the runoff which in many cases ends up in local ponds, creeks and rivers.

DuPage County Water Quality Grant Program

DuPage County Stormwater Management’s Water Quality Improvement Grant Program provides financial assistance to projects providing a regional water quality benefit. This program is open to any organization or individual within DuPage County with an eligible water quality project. Eligible projects include stream bank stabilization involving bioengineering practices; in-stream habitat improvements; pond restoration; channel rehabilitation; riparian buffer rehabilitation; wetland creation and/or restoration; and green infrastructure to reduce or filter stormwater runoff. Please see the County’s webpage for further information.

National Pollutant Discharge Elimination System (NPDES)

The City of Warrenville is considered a Municipal Separate Storm Sewer System (MS4) and was required to submit a Notice of Intent (NOI) to the Illinois Environmental Protection Agency (IEPA) annually which described the various ways the City was addressing the 6 Minimum Control Measures defined in General NPDES Permit No. ILR40 (PDF).

Each year by June 1, the City is required to submit an Annual Facilities Inspection Report covering the 12 months from April 1 of the previous year through March 31 of the current year.

2022-2023 Annual Facility Report (PDF)

2021-2022 Annual Facility Report (PDF)

County 2022 Stormwater Management Annual Report

2021 Notice of Intent

Stormwater Management Program Plan

November 2016 (PDF)