With the colour of Yamuna changing, the city administration must immediately take some steps to tackle the problem of water contamination. In the monsoon season the flow of Yamuna becomes strong with a lot of soil and silt in the water, which comes through soil erosion.

This dirty water not only changes the colour of the river from black to yellow but it affects the water treatment plants of Delhi. The 50-year-old water treatment plants of Wazirabad and Chandrawal areas of Delhi are again suffering with the yellow water problem.