The Delhi government has cleared a Rs 1,950-crore project to tap drains carrying sewage from colonies not connected to the city sewers. Interceptor sewers to be used for tapping is seen by the

Rs 1,950 crore for interceptors is in addition to Rs 387 crore under the Yamuna Action Plan II and Rs 1,500 crore spent on Yamuna cleaning in Delhi. But interceptors have failed in Agra, Varanasi and other places

They will not work in Delhi as well because even if all the city's sewage (3,600 mld) is intercepted and treated the river would require 24,000 of freshwater for diluting it to make it fit for bathing, at a conservative estimate