Federal Agencies
  Army Corps of Engineers
  Federal Emergency Management Agency (FEMA) 
  United States Geological Survey (USGS)

Indiana State Agencies
  Department of Natural Resources (DNR)
  Department of Environmental Management
  Indiana Department of Homeland Security (Formally SEMA)

Other Organizations
  Indiana Association for Floodplain and Storm Water Management (INAFSM)
  Indiana Water Resources Association
  Indiana Planning Association
  Indiana Association of Cities and Towns (IACT)
  Indiana Geographic Information Council
  American Water Works Association
  American Planning Association
  American Council of Engineering Companies (ACEC)
  American Society of Civil Engineers (ASCE)
  Association of State Floodplain Managers (ASFM)

Local Watersheds Web Pages
  Upper White River Watershed Alliance
  Wildcat Creek Watershed Alliance
  Big Cicero Creek Watershed
  The Maumee River Basin Partnership of Local Governments (MRBPLG)