After Delhi breathed its cleanest air on Monday this year, the national capital has gone back to its unhealthy air quality due to lack of rain and air.
Delhi’s Air Quality Index (AQI) was recorded at 169 on Tuesday morning, which was considered unwell.
Read also | Delhi’s air quality ‘very poor’ Here’s what you need to know about AQI and how it’s measured
Monday’s heavy overnight rain achieved what this year’s monsoon could not – producing a “good wind” day, the first in October since the index began in 2015. The city’s average AQI entered the “good” zone (below 50) on Monday. For the first time in 14 months.
Delhi’s AQI was 355 on Sunday.
According to the IMD, a Western Disturbance over south Afghanistan and easterly winds over northwest India had contributed to the prevailing weather conditions in the capital on Monday.
The PM10 level at Anand Vihar monitoring station fell to 48 micrograms per cubic meter at 7 pm on Sunday from 346 micrograms per cubic meter at 4 am. The PM10 level on Mandir Marg fell to 23 micrograms per cubic meter at 7 pm from 472 micrograms per cubic meter at 4 am. The PM2.5 level on Mandir Marg was almost zero at 7 pm, while it was 349 micrograms per cubic meter at 4 am.
“For the past one month, I have been tweeting air quality data in Delhi. Pollution has increased in the last 3-4 days and this is due to stubble burning in neighboring states. Farmers in neighboring states are forced to burn stubble as their governments are doing nothing for them (to stop stubble burning),” Kejriwal said at an event organized to lay the foundation stone of a new government hospital in Shalimar Bagh. .
Data from the Central Pollution Control Board, which started measuring AQI from 2015, shows that good air days are rare in Delhi. Not a single day was recorded in 2015, 2016 and 2018. There are still rare days outside the monsoon season, with just one recorded since 2015 before Monday.
In 2017, there were two “good wind” days on July 30 and 31. In 2019 also two days were mentioned – August 18 and August 19.
Last year, Delhi saw five good air quality days – one in March after the total Covid lockdown and four in August.
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