Waste management is co-ordinated by the local authority via the Surrey Waste Disposal Authority and domestic waste collected by Spelthorne Borough Council. Locally produced inert waste for disposal is sent to landfill in Alfold and Shefford, and a proportion to energy from waste plants in Slough and Kent to lower landfill tax. Plans have been approved to permit gasification in Charlton in the north of the Shepperton post town as part of the county's Eco Park to take up to half of the county's residual waste. Shepperton's Distribution Network Operator for electricity is UK Power Networks; aside from renewables there are no power stations in the area. Thames Water manages Shepperton's drinking and waste water; water supplies being sourced from the London sources including several reservoirs fed by the River Thames locally. There are water treatment works at Ashford, Hampton and sewage treatment works at Isleworth.