Maps and GIS Data
Downloadable spatial data files for exploration and analysis.
Selected Water Spatial Data
- Annual Water Data Reports
Individual site data for a particular year, beginning in 2006.
- National Water Information System (NWIS)
USGS Water Data for the Nation: Water-resources data collected at approximately 1.5 million sites in all U.S. States and Territories. Primary categories are Real-time Data, Site Information, Surface Water, Groundwater and Water Quality.
- National Hydrography Dataset
Detailed spatial data with information about surface-water features and their upstream or downstream relationships.
- Water data discovery
Summary of water-data access tools organized by time: water now, water then, and water tomorrow.
- Spatial data
Spatial data and metadata created for water assessment and research projects.
- Water-use maps and data
Categories of water use in the United States in 2000, 1995, and 1990, by State, with data available by County.
Groundwater (well and aquifer information)
- Aquifer Basics
A collection of data and maps of the principal aquifers throughout the United States.
- Real-time groundwater level network
Map-based data from over 1,000 wells where data typically are recorded at 15- to 60-minute intervals.
- Ground Water Atlas of the United States
Groundwater resources of regional areas in the United States.
- Groundwater response to climate
Map-based data from about 550 wells that monitor the effects of droughts and other climate variability on groundwater levels.
- Recent groundwater level networks
Map-based data and information from more than 20,000 wells that have been measured by the USGS or cooperators at least once within the past 365 days.
Surface Water (stream, lake, and reservoir conditions)
- Historical streamflow conditions (1921-2002)
Maps and animations of monthly and annual streamflow conditions by water year.
- Monthly streamflow
National and State maps and animations showing monthly average streamflow conditions (2002-present) by hydrologic units.
- Real-time streamflow
Maps, graphs, and tables of real-time streamflow conditions compared with historical streamflow for the United States. Includes Flood Watch and Drought Watch.
Water Quality (chemical, biological, and physical characteristics)
- National Water-Quality Assessment
Maps showing sediment, chemical, biological, and physical water quality data for 42 study units (basins) across the Nation.
- NAWQA digital maps -
National maps from featured National Water Quality Assessment (NAWQA) Program activities.
- National Stream Quality Accounting Network
Ongoing characterization of the concentrations and transport of sediment and chemicals in the Nation's largest rivers.
- Real-time surface-water quality
Map-based access to real time water-quality monitoring data collected in surface waters throughout the United States.
- Modeling of surface-water quality (SPARROW)
Tools, data, and information for interpreting water-quality monitoring data by relating stream water-quality measurements to watershed characteristics.
Watershed Theme Maps and Spatial Data
- Hydrologic Units
National watershed maps and data subdivided into four levels of successively smaller areas.
- Science in Your Watershed
Scientific information organized on a watershed basis.
- Watershed Boundary Dataset
Nationally consistent watershed data subdivided into 6 levels are available from the USGS and USDA-NRCS-National Cartographic and Geospatial Center's (NCGC) Watershed Boundary Dataset.
Mixed Theme Maps and Spatial Data (from the USGS and other sources)
- USGS maps
Printed maps, standards, names, symbols, descriptions, and additional explanatory information.
Locate USGS imagery data by interactive map or place name. Query and order satellite images, aerial photographs, and cartographic products from the USGS.
- Geospatial Platform
Ready access to federally maintained geospatial data, services and applications.
- Geographic Data Download
National base map data.
- Geospatial One Stop
Maps, data, and services to find geospatial data and learn about geospatial projects.
- GISDATA Map Studio
View and download geospatial data specially prepared for seamless access and delivery.
- National Geospatial Program
USGS coordination activities for geospatial production and services. Promotes consistent and accurate geographic data creation.
- National Atlas
Geographic information, map layers, and map products from more than 20 Federal organizations in the form of electronic maps and services.
- Open Geospatial Consortium
A non-profit international organization that is leading the development of standards for geospatial and location-based services.
- The National Map
View and download nationally consistent datasets.
- The National Map seamless data
View and download geospatial data. Includes orthoimagery (aerial photographs), elevation, geographic names, hydrography, boundaries, transportation, structures, and land cover.
Water Themes from Other Agencies
- Flood maps
Online access, ordering and pricing information for Federal Emergency Management Agency (FEMA) flood maps.
- National Wetlands Inventory
Map information and data for U.S. Fish and Wildlife Service wetland maps.
- National Weather Service
Access to National Weather Service River Forecast and Warning Services
- National Hydrologic Warning Council
A non-profit organization dedicated to assisting emergency and environmental management officials by providing expert advice on the use of real-time, high quality hydrologic information from automated remote data systems, with the goals of protecting lives, property, and the environment
- Storm prediction center
National Weather Service (NOAA)
Links Federal, State and local partners' statistical data with environmental data (EPA).