Madurai Corporation has existing Under Ground Sewerage System since from 1927 covering core part of the city. UGSS was provided in South of Vaigai River areas core city area where Madurai was municipality before the year 1971. During the year 1983 – 1986, the areas lying in north of River Vaigai have been sewered. Under NRCP Phase I, 122.44 Km of sewer line have been sewered with 6 nos. of pumping stations, which has been commissioned during the year 2006 and under Phase II 213.87 Km sewer line have been sewered with 12 nos. of pumping stations, and has been commissioned during the year 2008. After completion of NRCP Scheme almost 90% of the erstwhile areas have been sewered Madurai Corporation. Balance 72 Km length of uncovered stretch also provided with sewerage system under JnNURM during 2011. Renovation of very old sewerage system and to treat the collected sewage with advanced and modern technology, under JnNURM.