Delhi Jal Board Chairman and Water Minister Saurabh Bhardwaj Saturday alleged that the illegal sand mining in Haryana was blocking the supply of Yamuna's water towards the national capital and asked the LG to take note of the matter. The minister's allegation came on the heels of a letter Delhi Lieutenant Governor V K Saxena wrote to Chief Minister Arvind Kejriwal flagging the "miserable hygiene and sanitary conditions" at the Wazirabad Water Treatment Plant which supplies drinking water to large parts of the national capital.