Delhi Records Worst Air Quality In 4 Years After Diwali


    Delhi Records Worst Air Quality In 4 Years After Diwali

    Delhi Records Worst Air Quality In 4 Years After Diwali

    PM2.5 levels stood at 329 ug/m3 at 7 pm. The safe limit is 60 ug/m3.

    New Delhi:

    Delhi taped the worst air quality in four years on the day after Diwali as pollution levels in the city and its suburban areas crossed the “emergency situation” threshold on Sunday due to the combined result of stubble burning and firecrackers.

    However, greater wind speed– as much as 25 kilometers per hour– and light rains under the influence of a fresh Western Disturbance brought some relief.

    The air quality had actually turned “extreme” on Saturday evening with stubble burning accounting for 32 percent of Delhi’s PM2.5 contamination, but firecrackers emissions and calm winds made the circumstance even worse.

    The levels of PM2.5, which is about 3 percent the diameter of a human hair and can lead to sudden deaths from heart and lung illness, were 396 microgram per cubic meter (ug/m3) in Delhi-NCR at 6 am, above the emergency threshold of 300 ug/m3.

    PM2.5 levels stood at 329 ug/m3 at 7 pm. The safe limit is 60 ug/m3.

    PM10 level stood at 543 ug/m3 at 6 am, above the emergency threshold of 500 ug/m3, prior to it began decreasing. It was 441 ug/m3 at 7 pm, according to Central Contamination Control Board (CPCB) data. PM10 levels listed below 100 ug/m3 are considered safe in India.

    According to the Graded Reaction Action Strategy (GRAP), the air quality is considered in the “severe plus” or “emergency” category if PM2.5 and PM10 levels continue above 300 ug/m3 and 500 ug/m3 for more than 48 hours.

    Based On Delhi Pollution Control Committee data, hourly PM10 concentrations soared to 1,636 ug/m3 by 1 am at Punjabi Bagh and 1,937 ug/m3 by midnight at Jahangirpuri.

    A a great deal of individuals burst crackers throughout the national capital and its residential areas on Saturday night, flouting the restriction enforced by the National Green Tribunal.

    The tribunal had on Monday enforced an overall ban on sale or use of all kinds of firecrackers in the National Capital Area (NCR) from November 9 midnight to November 30 midnight, saying “celebration by crackers is for happiness and not to celebrate deaths and diseases”.

    The city recorded a total AQI of 414 on Saturday. It had actually soared to 454 by 10 pm. On Sunday, the 24- hour typical AQI stood at 435 at 4 pm, which was the worst on the day after Diwali in the last 4 years.


    Delhi tape-recorded a 24- hour average AQI of 337 on Diwali last year (October 27), and 368 and 400 on the next two days. Thereafter, contamination levels remained in the “severe” classification for 3 days on the trot.

    In 2018, the 24- hour average AQI (281) on Diwali was tape-recorded in the “poor” category. It deteriorated to 390 the next day and remained in the “severe” category on 3 successive days afterwards.

    In 2017, Delhi’s 24- hour typical AQI on Diwali (October 19) stood at319 It, however, slipped into the “serious” zone the next day and stood at 403.

    According to India Meteorological Department, Delhi-NCR experienced light rain on Sunday and higher wind speed under the influence of a fresh Western Disturbance which helped in dispersion of contaminants.

    The optimum wind speed was around 25 kilometers per hour on Sunday. It will be around 12 to 15 kmph on Monday– which will agree with for dispersion of toxins, Kuldeep Srivastava, the head of the IMD’s regional forecasting centre, said.

    The Ministry of Earth Sciences” air quality monitor, SAFAR, said the magnitude of PM2.5 recommends significant local extra emissions (most likely firecracker related) on Saturday night combined with farm fire-related toxin concentrations led to “such a situation where hourly average concentrations touched more than 1000 ug/m3 at midnight yesterday”.

    Nevertheless, the limit layer wind instructions has changed to easterly which is not favourable for stubble fire-related invasion.

    Stubble fires have actually decreased to around 350 on Sunday compared to around 2,586 a day before. The share of farm fires in Delhi’s PM2.5 was around 4 per cent on Sunday.

    The Air Quality Early Caution System for Delhi also stated the situation is likely to “enhance significantly” on Monday.

    ( the headline, this story has not been released by Essential India News staff and is released from a syndicated feed.).


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