Founded in 1939, Sioux Corporation builds custom designed industrial cleaning equipment with hundreds of options. If something in the company s standard line does not meet the client s needs, Sioux will custom design a machine. It manufactures a line of electrically heated and driven hot water pressure washers and steam cleaners. These machines use no fossil fuels and produce no exhaust. Explosion-proof models are available for use in high-risk areas. Sioux offers a 50-hertz, non-standard voltage unit that has continually increased export sales. Sioux sells industrial cleaning equipment to more than 70 countries throughout the world. In 2003, Sioux was selected by the Small Business Administration as Small Business Exporter of the Year. Sioux Corporation is a family-owned business located in Beresford, S.D.