Gorai and Manori will finally get their own sewage network. The BMC, said sources, has appointed a consultant to prepare a detailed report for laying out of the sewer line network. They will also need to install a sewage treatment plant, which may be a challenge considering the thicket of mangroves on the islands.

According to recent directives of the National Green Tribunal (NGT), all local bodies and other state government departments should ensure that 100 per cent of the wastewater generated is treated. If not, the state government has been asked to recover the compensation from April 1, 2020.