Enservco Corporation, through its subsidiaries, provides oil field services to the onshore oil and natural gas industry in the United States. It offers well enhancement services, such as hot oiling, acidizing, frac water heating, and pressure testing; fluid management services, including water transfer, water treatment, water/fluid hauling, frac tank rental, and disposal services; and well site construction and roustabout services, as well as other general oilfield services. The company owns and operates a fleet of approximately 340 specialized trucks, trailers, frac tanks, and other well-site related equipment. It operates in the Eastern United States region comprising the Southern region of the Marcellus Shale formation and the Utica Shale formation in eastern Ohio; Rocky Mountain Region consisting of western Colorado and southern Wyoming, central Wyoming, and western North Dakota and eastern Montana; and the Central United States region, including southwestern Kansas, Texas panhandle, northwestern Oklahoma, and the Eagle Ford Shale in south Texas. The company was founded in 1974 and is headquartered in Denver, Colorado.