Unregulated urbanisation has resulted in severe
environmental degradation, like the narrowing of riverbanks for housing at Leprosy Colony, located between Dahisar and Borivali, and Cowsheds. The river has been frequently diverted due to dumping of
construction debris,
solid waste, and
industrial waste in the region from Western Railway Tracks on Dahisar West up to Dahisar Bridge and dumping of solid waste generated at Stables near Daulat Nagar and areas near S.V.Road. Encroachments on dry areas of the riverbed as well as on the banks of this river had choked and pinched the watercourse and aggravated the risk of flooding. Field observations indicated that the river also suffered from dumping of debris from construction activities, industrial wastes on the banks, and dumping of municipal solid wastes coupled with inadequate annual desilting efforts. Ingress encroachments from the banks (building, industries, and slums) as well as modification of river-course and local diversion of streams have compounded the risk of flooding. Some of the glaring encroachments are: Bridge along Dahisar River between Western Express Highway and S. V. Road, Marble Shops near the Western Express Highway, Leprosy Colony, slum pockets between Bhagwati Hospital and Rustomjee Park, and Ranchhoddas Marg. ==2005 Floods==