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- EPA Wetlands page and Clean Water Act page
- Clean Water Act text from Senate Environment and Public Works Cmte.
- Army Corps of Engineers regulatory program (wetland permits, etc.), Divisions and District contacts
- Fish and Wildlife Service National Wetlands Inventory
- Status and Trends Report, 2004-9
- Society of Wetland Scientists with links as organized below
- Soil Science Society of America
- Association of State Wetland Managers
- National Wetlands Research Center (USGS)
- Natural Resources Conservation Service (NRCS)
- NRCS: Hydric Soils of the United States
- Northern Prairie Wildlife Research Center
- Patuxent Wildlife Research Center
- Ramsar International Convention on Wetlands
- San Francisco Bay Joint Venture