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 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, before maps become effective, in which the community updates, revises, and adopts ordinances to comply with the new FEMA maps. During this six month period a county's status is considered final. Counties in blue have final maps. Counties in green have become effective. Counties with hash marks have revisions for some panels. Please see our disclaimer.