It is not just the Mithi river that is susceptible to degradation due to encroachment and dumping. There are at least two more rivers and six natural drains in the city that are highly vulnerable and in need of immediate attention, as per a recent study funded by the Mumbai Metropolitan Region Development Authority (MMRDA).

These are the Oshiwara river, Poisar river, Vikhroli nullah, Mogra nullah, Tilak Nagar nullah, Piramal Nagar nullah, Irla nullah and Safed Pul nullah and are part of the five rivers and 19 natural drains in the city. According to the study, the Dahisar river also needs attention but is not as critical as the others.