The oeverall air quality index (AQI) of Delhi was at 47 falling in the good category.
NEW DELHI: The improvement in the air quality came as a surprise. Rainfall in and around the national capital brought down the air quality on Saturday to ‘good’ condition. Additionally, PM 2.5 levels, recorded by the US Embassy and Safar, were the lowest in this year.
According to the System of Air Quality and Weather Forecasting (SAFAR) and the Central Pollution Control Board (CPCB), the overall air quality index (AQI) of delhi was at 47. This falls under the ‘good’ category.
The level of PM 2.5 was recorded at 17. The PM 10 level was recorded at 31 on Saturday, Safar said. These denote levels of particulate matter of two sizes up to 2.5 and 10 micrometres in diameter, in the atmosphere.
In comparison, the AQI in New York was recorded at ‘good’ at 17, at 34 in Frankfurt, while in London, it was a ‘moderate’ 52.
A CPCB scientist said that in 2017, the city had witnessed the AQI recorded below 50, at 42, but could not recall the exact date. The CPCB is recording AQI since 2015 and such good conditions have not been seen in the last four years.
Gufran Baig, scientist and programme director at SAFAR, said that this is the lowest AQI recorded this year and it will remain good for another two to three days.
He said that the air quality has improved due to widespread rain received in the northern parts of the country.
“Rajasthan, Himachal Pradesh, Punjab, Haryana and Uttar Pradesh, all areas surrounding are receiving a good amount of rainfall this year which is improving air condition in the city. Such kind of rain was never received earlier. The air quality has never reached this level,” Baig said.
“The widespread rain has helped in improving air quality in Delhi as well as in Noida and Gurugram. Increased rainfall activity is likely to bring more respite in coming days,” he said. The rain has also helped in settling down pollutants.