Lake Pelican Water Project District
- Formed to improve the quality of the water in Lake Pelican near Watertown. Flood protection, projects, video, and contact information.
- http://www.lakepelicanwaterprojdist.com/

Black Hills Weather Information
- Includes information about chinook winds, how geography affects weather, and other aspects of the meteorology of the Black Hills region.
- http://www.blackhillsweather.com/

South Dakota Geological Survey
- Mission is to conduct geologic studies, hydrologic studies, and research; and to collect, correlate, preserve, interpret, and disseminate information, leading to a better understanding of the geology and hydrology of South Dakota.
- http://www.sdgs.usd.edu/

Water Resources of South Dakota
- Hydrologic information and appraisal of the state's water resources, provided by the U.S. Geological Survey.
- http://wwwsd.cr.usgs.gov/