Environment
- Envirofacts a single point of access to select U.S. EPA environmental data. This website provides access to several EPA databases to provide you with information about environmental activities that may affect air, water, and land anywhere in the United States.
- EPA Publications Source Provides access to EPA technical and public information.
Water
- NOAA Charting and Navigation provides world-class information products and services to aid domestic and global commerce, promote safe and efficient marine and air transportation, and add to our understanding of the world's oceans.
- Publications and Images From the National Snow and Ice Data Center
- Databases From the International Hydrological Programme (IHP), UNESCO's intergovernmental scientific co-operative programme in water resources