The South Florida Water Management District 
http://www.sfwmd.gov

Florida Department of Environmental Protection Water Resource Management http://www.dep.state.fl.us/water/

Environmental Protection Agency - Office of Groundwater & Drinking Water http://www.epa.gov/safewater/

U.S. Geological Survey Water Resources of the United States http://water.usgs.gov/

Florida Fish & Wildlife Conservation Commission
http://myfwc.com

Florida Engineering Society 
http://www.fleng.org/

American Water Resources Association Florida Section http://www.awraflorida.org/