Maps

National Oceanic and Atmospheric Administration's (NOAA) bathymetric and topographic maps and data.

Explore the full set of inundation maps that shows where flooding would occur given a selected stream condition. Users can also access historical flood information and potential loss estimates based on the severity of the flood. The FIM Mapper helps communities visualize potential flooding scenarios, identify areas and resources that may be at risk, and enhance their local response effort during a flooding event.

Provides links and information on hydrologic unit maps of the U.S.

View over 13,000 USGS real-time stream, lake, reservoir, precipitation, water quality, and groundwater stations in context with current weather and hazard conditions.

Map-based access to USGS water data.

This website compiles USGS resources and data related to principal aquifers including Aquifer Basics, principal aquifers maps and GIS data, and the National Aquifer Code Reference List.

Displays maps, graphs, and tables describing real-time, recent, and past streamflow conditions for the United States.