Dee Valley Group plc is a United Kingdom-based water supply company. The principal business of the Company is the provision of water services to customers in an area of over 830 square kilometers, in North East Wales and North West England. The Company supplies approximately 60 million liters of water a day. The Company draws 80% of supplies from the River Dee. The Company operates approximately 10 impounding reservoirs, two river abstractions and two groundwater sources. The Company's subsidiaries include Dee Valley plc, Dee Valley Water (Holdings) Ltd, Dee Valley Water plc, Dee Valley Services Ltd, North Wales Gas Ltd, Energy Supplies UK Ltd, Northern Gas Supplies Ltd, Chester Water Ltd. and Wrexham Water plc. The Company, through its trading subsidiary Dee Valley Water plc, supplies drinking water to domestic and business customers in north-east Wales and in north-west Cheshire.