Enservco Corporation, through its subsidiaries, provides oil field services to the onshore oil and natural gas industry in the United States. It offers fluid management services, including water/fluid hauling, frac tank rental, and disposal well services; well enhancement services, such as hot oiling, acidizing, frac heating, and pressure testing services for assisting in the fracturing of formations for newly drilled oil and natural gas wells; and maintaining and enhancing the production of existing wells; and well site construction and roustabout services. As of January 23, 2013, the company owned and operated a fleet of approximately 245 specialized trucks, trailers, frac tanks, and related well-site equipment. It operates in the Eastern United States region, including the Southern region of the Marcellus Shale formation and the Utica Shale formation in Eastern Ohio; Rocky Mountain Region, including Western Colorado and Southern Wyoming, and Western North Dakota and Eastern Montana; and the central United States region, including Southwestern Kansas, Texas panhandle, Northwestern Oklahoma, and Northern New Mexico. Enservco Corporation was founded in 1974 and is based in Denver, Colorado.