The CPCB has also sought an action plan and a compliance report from the Delhi Jal Board in the matter by May 20.
A bench headed by NGT Chairperson Justice Swatanter Kumar issued notices to the AAP government, Delhi Jal Board, DDA and others while asking them to file action taken reports after the Ganesh Chaturthi festival.
Kapil Mishra said this after visiting Seechewal Gaon in Punjab's Kapurthala to meet noted environmental activist Balbir Singh Seechewal, who has played a prominent role in reviving the Kali Bein rivulet.
The ramshackle neighbourhoods of northeast Delhi are home to 2.2 million people packed along narrow alleys. Buildings are made from a single layer of brick.
Pratibha Industries along with its joint venture partner Mohinzhstroi Open Joint Stock company has bagged two orders worth Rs 1,249 crore for Delhi Jal Board projects.