“There are 1,500 planned colonies. Then there are several unauthorised colonies, which also consume water. The small sample indicates that DJB is unable to reach colony levels,” said Dunu Roy of NGO Hazard Centre.
Debashree Mukherjee, DJB CEO, says, “This (400) is not a small size. This is over and above samples tested at water treatment plants. For other areas, our tests are ample.”