The Vice-Chairman of Delhi Jal Board Raghav Chadha visited Sonia Vihar water treatment plant on October 31. He inspected ongoing work to resolve water issue. The water supply was disrupted as Sonia Vihar and Bhagirathi water treatment plants, which receive Yamuna water, were temporarily shut due to high level of ammonia in it. According to the Delhi Jal Board, about 70% of water supply in the national capital has been resumed. Speaking on this Chadha said, "Ammonia level had risen in Yamuna River so we had to shut two water treatment plants. Level of the pollutant is reducing now and the two plants have resumed operation. There'll be no problem in supply of water."