Delhi records ‘poor’ air quality for 8th straight day


By PTI IST (Released)

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Diwali will be celebrated nationwide on Monday. The contribution of stubble burning to Delhi’s PM2.5 pollution has so far remained low (up to 5%) due to low transport wind speeds.

Delhi’s air quality was recorded in the ‘poor’ category for the eighth day in a row on Sunday and could become ‘severe’ on Diwali due to firecracker emissions and an increase in smoke from burning stubble due to favorable wind speed and direction. . The capital’s air quality index (AQI) stood at 243 at 10 a.m. It was 265 at 4 p.m. Saturday.

Only one (Anand Vihar) of the city’s 35 monitoring stations recorded the air quality as “very poor”. An AQI between zero and 50 is considered “good”, 51 and 100 “satisfactory”, 101 and 200 “moderate”, 201 and 300 “bad”, 301 and 400 “very bad”, and 401 and 500 “severe”. .

SAFAR, a forecasting agency under the Union’s Earth Science Department, said air quality could deteriorate to “very poor” levels even if no firecrackers go off. Should firecrackers break out like last year, air quality could plunge to “severe” levels on Diwali night itself and continue to remain in the “red” zone for another day.

Diwali will be celebrated nationwide on Monday. The contribution of stubble burning to Delhi’s PM2.5 pollution has so far remained low (up to 5%) due to low transport wind speeds.

“However, the wind direction and speed at the transport level is expected to become very favorable from Monday afternoon. This will increase the share of stubble burning in Delhi’s PM2.5 pollution to 15-18% on the 25th. October and will push the air quality into the ‘severe’ category,” said Gufran Beig, Founding Project Manager, SAFAR. Diwali.

Burning paddy straw accounted for 25% of Delhi’s PM2.5 pollution last year on Diwali. The share of smoke from farm fires in pollution in Delhi was 32% in 2020 and 19% in 2019.

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