India, Dec. 2 -- The Delhi Jal Board's interceptor sewer project (ISP), aimed at cutting the sewage flowing into Yamuna, has been finally completed after almost a decade of delays. However, the project's benefits in terms of reducing untreated sewage load is likely to take more time, DJB has said.

Planned in 2006 with an estimated cost of Rs.2,454 crore, the ISP was meant to cut off the sewage flowing into Yamuna through building trunk drains and treat it before it entered the river, thus boosting the water quality. The idea was to intercept the smaller sewers by the trunk sewer line running along the large drains and block them from meeting the main drains while diverting the raw sewage to treatment plants.

The Delhi government, in its...