Sewerage and sewage treatment is a part of public health and sanitation, and according to the Indian Constitution, falls within the purview of the State List. Since this is non-exclusive, non-rivalled and essential, the responsibility for providing the services lies within the public domain. The activity being local in nature, it is entrusted with the Urban Local Bodies. The Urban Local Body undertakes the task of sewerage and sewage treatment service delivery, with its own staff, equipment and funds. In few cases, part of the said work is contracted out to private enterprises.