Severn Trent Plc provides and treats water, and removes waste water in the United Kingdom and internationally. The Company operates in two segments: Severn Trent Water and Severn Trent Services. Severn Trent Water is a regulated water and sewerage company in England and Wales. Severn Trent Services is a commercial supplier of water and waste water treatment services and products, with customers in the United States, Europe, Middle East and Asia. Severn Trent Services provides water and waste water treatment products and operating services to utilities, municipalities and commercial customers in selected key markets worldwide. The Company has three principal business streams: Water Purification (Products), Operating Services and Analytical Services. In February 2013, it has sold Severn Trent Services' Analytical Services (also known as Severn Trent Laboratories) to ALS Ltd.