Several stages and areas are managed independently, such as The Left Field which is managed by a cooperative owned by Battersea and Wands worth TUC, Worthy FM and a field run by Greenpeace. The sound systems on site have a total power of 650,000 watts, with the main stage having 250 speakers. There are over 4,000 toilets, 2000 long-drop and 1300 compost, with water supplies including two reservoirs holding 2,000,000 litres (440,000 imp gal) of water. Medical facilities are provided by Festival Medical Services who have done so since 1979. The bars are organized by the Workers Beer Company, sponsored by Carlsberg. It has over 500 food traders on site