Saving Water, U.S. Farmers Are Worried They'll Parch
- New York Times article about progress of water conservation and future supply outlook in the region served by the Ogallala Aquifer.
- http://www.nytimes.com/2002/08/28/international/worldspecial/28WATE.html

Lewis and Clark Rural Water System
- Regional water planning organization in South Dakota, Iowa and Minnesota.
- http://www.lcrws.org

Ground Water Atlas of the United States: Montana, North Dakota, South Dakota, Wyoming
- Online USGS report describes the groundwater resources of this 4-state region.
- http://capp.water.usgs.gov/gwa/ch_i/index.html

Ground Water Atlas of the United States: Kansas, Missouri, and Nebraska
- USGS report on the geology and hydrology of principal aquifers in the region.
- http://capp.water.usgs.gov/gwa/ch_d/index.html