Links to Resources

National Sites Related to Hydrogeology

http://www.usgs.gov/
United States Geologic Survey

http://nhd.usgs.gov/index.html
USGS National Hydrography Dataset

http://www.awra.org/
American Water Resources Association

http://water.epa.gov/drink/index.cfm
EPA- Ground Water and Drinking Water

http://www.atsdr.cdc.gov/toxprofiles/index.asp
CDC - Toxic Substances Portal