Mains water in Warwickshire (England) is supplied by Severn Trent Water (most); South Staffs Water (north Warwickshire); typical hardness: Moderately hard to hard, ~187 to 274 mg/l CaCO3. Water quality is regulated by the Environment Agency · Ofwat · Drinking Water Inspectorate.
Sources: Severn Trent Water (most); South Staffs Water (north Warwickshire)