Delhi Jal Board — dirty water supply (with lot of sand)

Address:

B-79, Vivek Vihar-I, New Delhi, Delhi, 110095

For around past 1 month, it is noted that water supplied by DJB contains lot of sand and sediments. While washing/spinning, it's clearly visible and multiple spinning is required. Lot of sands is observed in the bucket water. This is creating lot of trouble and wastage of plenty of water.
It has been observed that for past few months, sewer related activities have been carried out by DJB. It is quite possible that digging for this purpose might have made this problem of contamination.
We are observing lot of settlement of sand / dust in the bucket and washing machine. Water purification equipment is also requiring frequent cleaning.
Please arrange to attend this problem on urgent basis.