deepavali: Deepavali: Bengaluru’s air quality back to pre-Covid levels | Bengaluru News – Times of India


BENGALURU: Air Quality Index (AQI) values during Deepavali this year increased by 23% compared to last year and were almost at pre-pandemic levels, as per data from seven continuous monitoring stations of the Karnataka State Pollution Control Board (KSPCB).
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Air quality monitoring data on October 28 in Bengaluru city showed that six of the seven locations had moderate AQI: namely City Railway Station (105), Hebbal (109), Jayanagar (123), Kavika (178) and Nimhans (106) and Silk Board (107). AQI is termed moderate if it’s between 101 and 200.
Only SG Halli had satisfactory AQI at 79. AQI between 51 and 100 is termed satisfactory, while 0 to 50 is good.
However, the AQI fell sharply during Deepavali days at six of seven stations. The spike in the lone station too was marginal. While City railway station saw average AQI duringDeepavaliincreaseto112, it fell at SG Halli (57), Hebbal
(45), Jayanagar (74), Kavika (87), Nimhans (42) and Silk Board (54). During Deepavali, one station had moderate AQI, four had satisfactory AQI and two good AQI.
The average decrease in AQI during Deepavali from October 28 was 42%, according to KSPCB. Air quality monitoring is carried out in Bengaluru as per Central Pollution Control Board guidelines. The average AQI in the city has been dropping during Deepavali since 2017 when it was 162. It fell to 111 in 2018, 81 in 2019 and 55 in 2020.
Srinivasalu, member-secretary, KSPCB, said, “During Deepavali in 2020, the number of Covid cases was high and citizens were scared. Hence, AQI was much lower and that’s why it cannot be used as a benchmark during Deepavali.”
Explaining how AQI on a normal day was higher than the Deepavali average, Srinivasalu said, “It is important to understand that AQI is hugely affected by rainfall. The particulars in the air are not there at least temporarily after a downpour and it cannot be considered. We should see if there is a downward trend showing decrease in AQI over the past five years.”
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Sagar Biswas

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