23/09/2026
Unregulated groundwater extraction across Mumbai's coastal strip has caused severe seawater intrusion, turning subterranean aquifers brackish in a 2–3 km zone along Colaba, Fort, Dadar, Mahim, and Mulund East. The Central Ground Water Board (CGWB) recommended immediate bans on deep borewells, artificial aquifer recharge, and a ₹76-crore stormwater management plan to protect municipal water supply and building foundations from chloride corrosion.