The Map Modernization Project at the Illinois State Water Survey is providing preliminary and final maps on this web site. Maps revised between preliminary and final phases are not posted. To download or view a map, click the bolded counties on the map below. Counties outlined in red are preliminary, and are for review purposes only. Preliminary maps are not official, and are not to be reproduced or used as official FEMA maps until they are finalized. There is a six month period after maps are finalized before they become official, effective FEMA maps. Counties outlined in blue have final maps. Counties outlined in black have become effective. Please see our disclaimer.

To view completed meeting dates and the status of Map Modernization in your County, click here.