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Pollution Levels Higher In Delhi This Diwali As Compared To 2019: CPCB

Mumbai: According to the report filed before the National Green Tribunal (NGT) of the Central Pollution Control Board (CPCB), the pollution levels in Delhi were higher this year as compared to last year due to the bursting of firecrackers and stubble burning.

The CPCB report states that Pitampura has recorded an increase in PM (Particulate Matter) and SO2, indicating the effect of the bursting of crackers on Diwali.

In 2020, on Diwali day, the decrease in PM10 and PM2.5 was observed to be around 16 percent and 18 percent as compared to the pre-Diwali day. This decrease is due to a decrease of about 6 percent in the contribution of stubble burn this year.

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The board also reported that as seen from the real-time monitoring network (37 CAAQM stations), the hourly average concentration of PM2.5 began to rise from 11 am on November 14, it reached a peak in most of the stations at around 1 am and continued at higher levels till 5 am.

According to the report, PM10 was increased by 70 percent in 2019 and PM 2.5 was increased by 149 percent compared to the day of Diwali.

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It also cited the comparative meteorology of the day before Diwali and the Diwali observed during the last five years, which shows that the average mixing height on Diwali and Diwali was the lowest this year (2020), and said that it was due to the fall of Diwali in mid-November when the effect of fall in temperature in winter and reversal began.

CPCB monitored the ambient air quality and noise level on the previous Diwali day (9 November) and on Diwali in Delhi as in previous years. Ambient air quality was monitored at 40 locations – 3 manual stations and 37 real-time stations.

Ambient noise levels were monitored at 16 locations – 6 manual and 10 real-time noise monitoring stations.

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