In other zones, the Corporation looks after the removal and processing of solid waste in the others, with a superintendent engineer managing the channels. As of 2011, 8 transfer stations exist within the city for treating the waste. Garbage is dumped in two dump-yards in the city—One in Kodungaiyur and another in Perungudi, with a major portion of the latter covering the Pallikaranai marshland. In market areas, the conservancy work is done during the night. Water supply and sewage treatment are handled by the Metropolitan Water Supply and Sewage Board, popularly referred to as "Metro Water". Electricity is supplied by the Tamil Nadu Electricity Board. Fire services are handled by the Tamil Nadu Fire and Rescue Service. The city, along with the suburbs, has 33 operating fire stations.