The Brihanmumbai Municipal Corporation (BMC) has secured the necessary clearances for the ₹1,192 crore Poisar River rejuvenation project, which was awarded two years ago. Approvals were granted by the Ministry of Environment, Forest and Climate Change, the Mangrove Cell, and the Coastal Zone Management Authority. However, civic sources warn that the project’s delay might lead to an increase in its overall cost.

The Poisar River originates from the Sanjay Gandhi National Park in Malad East, flows through Kandivali, and meets Malad Creek in Malad West. Spanning 9.29 kilometers within the BMC's jurisdiction, the river has suffered significant pollution over the years due to untreated residential and industrial waste discharge.

Following recommendations by the Madhav Chitale Committee after the 2005 Mumbai floods, the civic body has implemented measures to improve drainage and reduce flood risks. The National Green Tribunal (NGT) further directed the BMC to undertake rejuvenation and beautification efforts for the river.

As part of the project, the BMC plans to construct 10 sewage treatment plants (STPs) with a combined capacity to treat 33 million litres of sewage per day. The project includes the installation of sewer lines, 13 wastewater interceptors, and roadside drains, as well as widening the riverbanks to ensure smooth water flow. A service road along the riverbank is also planned.

The initiative also entails 15 years of operation and maintenance for the STPs, ensuring the river’s long-term health.