Severn Trent Plc provides water and wastewater services. The Company operates through two segments: Regulated Water and Waste Water and Business Services. The Regulated Water and Waste Water segment includes the wholesale water and waste water activities of Severn Trent Water Limited, its retail services to domestic customers, and Hafren Dyfrdwy Cyfyngedig. The Business Services segment includes its operating services businesses, the Green Power business, the Property Development business, and its other non-regulated businesses, including affinity products and searches.