Provides reference for community features in geoconnex.us
Two-digit Hydrologic Regions from USGS NHDPlus High Resolution
Four-digit Hydrologic Subregion from USGS NHDPlus High Resolution
Six-digit Hydrologic Basins from USGS NHDPlus High Resolution
Eight-digit Hydrologic Subbasins from USGS NHDPlus High Resolution
Ten-digit Watersheds from USGS NHDPlus High Resolution
Twelve-digit Subwatershed from USGS Water Boundary Dataset (WBD)
National Aquifers of the United States from USGS National Water Information System National Aquifer code list
Principal Aquifers of the United States from 2003 USGS data release
Secondary Hydrogeologic Regions of the Conterminous United States from 2018 USGS data release
United States Community Contributed Reference Stream Gages
United States Community Contributed Reference Mainstem Rivers
United States Community Contributed Reference Dams
Public Water Systems from United States EPA Safe Drinking Water Information System
States from United States Census Bureau Cartographic Boundaries
Counties from United States Census Bureau Cartographic Boundaries
American Indian/Alaska Native Areas/Hawaiian Home Lands
Federally recognized American Indian/Alaska Native Areas/Hawaiian Home Lands (AIANNH)
United States Metropolitan and Micropolitan Statistical Areas
United States Urbanized Areas and Urban Clusters from the 2010 Census
United States legally incorporated and Census designated places