Dee Valley Group plc, through its subsidiary, Dee Valley Water plc, supplies drinking water in northeast Wales and northwest Cheshire. The company supplies drinking water to approximately 266,000 domestic and business customers covering an area of 831 square kilometers. Dee Valley Group plc was founded in 1994 and is headquartered in Wrexham, the United Kingdom. As of February 15, 2017, Dee Valley Group plc operates as a subsidiary of Severn Trent Water Ltd.