India, May 14 -- Pune municipal commissioner Rajendra Bhosale has directed civic officials to ensure that contractors engaged in cleaning stormwater drains and sewer lines completely remove all garbage and silt, warning that payments will be withheld if debris is left on-site and flows back into the drains.

Ahead of the monsoon, cleaning of nullahs and drainage lines is underway across the city.

However, in several locations, contractors have left heaps of silt and debris near manholes instead of disposing of them, resulting in the waste being washed back into the system during the recent heavy rains.

"It's true that in some places, the drains got choked again as the removed silt mixed with rainwater and flowed back in. I have instruct...