Delhi records cleanest air in four years

Air Quality Index for first 7 months was 182.6 – down from 209 last year

GN Bureau | July 31, 2023

#Delhi   #air quality   #environment   #Pollution  
Compare and contrast: The capital during one of its worse winters earlier (GN Photo)
Compare and contrast: The capital during one of its worse winters earlier (GN Photo)

Delhi has recorded its lowest average Air Quality Index (AQI) during July this year compared to the corresponding period of last four years. This month, the capital experienced all 31 days with 'Good to Moderate' AQI.

The number of ‘Good to Moderate’ Air Quality Days for the 31-day period was 26 in 2019; 31 in 2020; 29 in 2021; 31 in 2022; and 31 in 2023.

The monthly average AQI for Delhi during this period was at 83.71 – that is, it remained in ‘Satisfactory’ AQI category. The city has recorded its lowest monthly average AQI during July 2023 compared to the corresponding period for the last four years from 2019 and monthly average AQI of July 2023 is comparable with the monthly average AQI of July 2020.

The chart below depicts the Monthly Average AQI for the month of July during the 05 years period (2019-2023):

During 31 days period of July of current year, Delhi has witnessed the lowest levels of daily average PM10 and PM2.5 concentration, as compared to the corresponding period since 2019 and is comparable to the average PM10 and PM2.5 concentration of July 2020.

A chart depicting PM10 and PM2.5 running average (µg/m3) for the 31 days period of July during the 05 years (2019-2023) is given below:




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