This guide to Hydric Soils of the United States focuses on the concerns of the National Technical Committee for Hydric Soils (NTCHS). The committee is responsible for maintaining the Hydric Soil Definition, Hydric Soil Criteria, National List of Hydric Soils, and Hydric Soil Indicators. The text and discussion contained in the guide are considered works-in-progress and reflect the current deliberations of the NTCHS. Membership of the NTCHS contains representatives of the Natural Resources Conservation Service, US Fish and Wildlife Service, US Army Corps of Engineers, Environmental Protection Agency, Bureau of Land Management, US Forest Service, universities, and the private sector.