The onset of monsoon this year might have wreaked havoc in most parts of north India, including vast areas of the Millennium City, but it also had a positive impact on the air pollution level.
Every year between March and May, the level of pollutants in the air increases substantially. But this time, the pollutants have been washed away in the first monsoon last weekend, according to officials of the Haryana pollution control board.
The average level of particulate matter in the air has been above 100 mg/metre3, which was reduced to 84.53 mg/metre3 on Wednesday. The level of carbon monoxide in the air was also recorded as low as 0.42 mg/metre3, which is normally between one and two.
The other air pollutants, including sulfur dioxide and nitrogen oxide, also remained low since Sunday.
"Most of the pollutants in the air decrease as rain and increased humidity wash them away. The decreased pollution level usually persists throughout the monsoon. However, water pollution increases during this period," said Rajesh Garhia, regional officer and environmental scientist, state pollution control board.
Garhia said that the board inspects water pollution level at regular basis at most industrial sites during monsoon.