After New Delhi breathed cleaner air this year on Monday, the national capital returned to unhealthy air quality, due to a lack of rain and wind.

Delhi’s Air Quality Index (AQI) was recorded on Tuesday morning at 169, considered unhealthy.

Read also | Air quality in Delhi is ‘very poor’. Here’s everything you need to know about AQI and how to measure it

Monday night’s heavy rain achieved what the monsoon couldn’t this year – producing a “good air” day, the first in October since the index began in 2015. The city’s average AQI on Monday entered the “good” (below 50) area in For the first time in 14 months.

On Sunday, the AQI in Delhi was 355.

Western turbulence in southern Afghanistan and easterly winds over northwest India contributed to weather conditions in the capital on Monday, according to the International Institute for Democracy (IMD).

At 7 p.m. Sunday at Anand Vihar monitoring station, PM 10 levels dropped to 48 mcg/m3 from a high of 346 mcg/m3 at 4 a.m. In Mandir Marg, PM 10 levels decreased to 23 mcg/m3 at 7 pm from 472 mcg/m3 at 4 am. PM2.5 levels in Mandir Marg were nearly zero at 7 pm, versus a figure of 349 mcg/m3 at 4 am.

“For the past month, I have been tweeting data on air quality in Delhi. Pollution has increased in the past three or four days, and it is caused by burning straw in neighboring countries. At an event organized to lay the foundation stone for a new government hospital in Shalimar Bagh,” Kejriwal said at an event organized to lay the groundwork for a new government hospital in Shalimar Bagh. Farmers in neighboring countries are forced to burn the rubble because their governments are doing nothing for them (to stop the straw burning).

Data from the Central Pollution Control Board, which began measuring AQI from 2015, shows that good air days are rare in Delhi. Not a single such day was reported in 2015, 2016 and 2018. Good weather days outside of the monsoon season are still rare, with only one day recorded since 2015, before Monday.

In 2017, there were two “Good Air” days, on July 30 and 31. Two days in 2019 were also reported – August 18 and 19.

Last year, Delhi saw five good air quality days – one in March after the full Covid lockdown and four in August.

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