Mains water in Surrey (England) is supplied by Thames Water (predominant); SES Water (east Surrey); South East Water and Affinity at edges; typical hardness: Hard to very hard (~239 to 302 mg/l CaCO3). Water quality is regulated by the Environment Agency · Ofwat · Drinking Water Inspectorate.
Sources: Thames Water (predominant); SES Water (east Surrey); South East Water and Affinity at edges