Bangalore Water Supply and Sewerage Board is an autonomous body formed by the State legislature under Bangalore Water supply and Sewerage Board Act on 10-09-1964 for Water Supply & Sewage disposal. It is one of the first Water supply & Sanitation Utilities in India with jurisdiction of entire Bruhat Bengaluru Mahanagara Palike Area of 800 Sqkm, (Bengaluru Core area of 245 Sqkm, 8 Urban Local Bodies of 330 Sqkm ( 7 City Municipal Corporation and 1 Town Municipal Corporation and 110 Villages of 225 Sq kms.) It has the following mandates: adequate water supply to meet demand; creation of sewerage network & safe disposal of sewage; Preparation, implementation of plans & schemes for augmenting water supply & safe disposal of sewage; Levy and collection of water charges on ‘no loss no profit basis’ for sustainability of the system.
Since its inception in the year 1964, BWSSB has executed several water supply and sewage schemes for the city, including the prestigious Cauvery Water Supply Scheme (CWSS) Stages - I, II, III & Stage IV Phase - I, Phase - II and sewerage system improvement projects concentrating on sewage collection, conveyance and treatment works. The existing sewerage system covers an area of 265 km2 of core area of the city, in which three major Sewage Treatment Plants (STP) are constructed at Vrishabhavathi, K&C and Hebbal Valleys (major and minor). The sewerage system for newly added areas mainly the erstwhile CMC’s is nearing completion.