A bench headed by Justice U D Salvi gave the direction to Uttar Pradesh and Haryana as well after observing that all three respondents are yet to file a reply despite being given time twice before for the same.
"Respondents 2 (MoEF), 6 (UP) and 7 (Haryana) are yet to file reply. Time was granted twice already to give reply. Respondents seek further time. By way of last opportunity, let the replies be filed within two weeks.
The tribunal had on April 12 issued notice and sought the responses of MoEF, the two states as well as Central Ground Water Authority (CGWA), Central Ground Water Board, city government and Delhi Metro Rail Corporation (DMRC) on the plea filed by Noida resident Vikrant Tongad.
While the rest of the parties have already filed their replies, UP, Haryana and MoEF are yet to do so.
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Tongad in his plea, filed through advocate Rahul Choudhary, has said that around 6.37 crore litres of water is being lost every year due to the failure to implement rain water harvesting at metro stations, tracks and depots.
He alleged that in most of the stations, rain water harvesting systems have not been installed and where they have been set up, they are not in proper working condition.