City Sewer System

The entire Brihanmumbai territory is divided in seven sewer zones vlz. Colaba, Worli, Bandra, Versova, Malad, Bhandup and Ghatkopar, for the sake of collection, treatment and disposal of the sewage. The treated sewage from Colaba, Worli andBandra Zones is disposed into the Arabian Sea through marine out falls. The Treated sewage from Versova zones is discharged into the Malad creek,while the treated sewage from Bhandup and Ghatkopar zones discharge into the Thane creek, through waste water treatment facilities such as aerated lagoons.