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City of Warrenville
28W701 Stafford Place
Warrenville, IL 60555
Ph: 630-393-9427
Floodplain
FloodplainFlood Maps
The DuPage County and the Federal Emergency Management Agency (FEMA) provide Flood Insurance Rate Maps (FIRM) and Regulatory Flood Maps (RFM) for all areas of DuPage County including the City of Warrenville. These maps may be viewed on DuPage County Stormwater Management Division website.

On June 1, 2017, FEMA issued Revised Preliminary Flood Insurance Rate Maps and the Flood Insurance Study. An open house was held to review preliminary maps, present the Flood Insurance Study reports, and discuss the process of reviewing and adopting the documents, as well as to solicit public comments at the DuPage County Government building in July 2017:

The regulatory appeal period will begin on February 28, 2018 and will last 90-days.  It is anticipated that the maps will become effective in summer 2019.   

These revised preliminary maps and reports can be viewed here:

17043C0127J
17043C0129J
17043C0133J
17043C0134J
17043C0137J
17043C0141J
17043C0142J
17043CIND0B

17043CV001B
17043CV002B
17043CV003B
17043CV004B
17043CV005B

The Illinois State Water Survey has provided a “Changes Since Last FIRM” online tool.

  • Go to www.illinoisfloodmaps.org
  • Scroll down to the “even more!” section.
  • Click on “Preliminary Changes Since Last FIRM (CSLF)”
  • Use the online ArcGIS map viewer to see changes to the proposed Preliminary FIRM maps

Paper copies of these maps are available for review at the City of Warrenville Community Development Department

Questions about the revised floodplain maps may be directed to Senior Civil Engineer Kristine Hocking at 630-836-3066 or or 
to the FEMA Map Assistance Center, toll free at 877-FEMA-MAP (877-336-2627).


USGS Real-Time Water Data