23/12/2015 8:28 PM IST | Updated 15/07/2016 8:25 AM IST

Today Is Officially Delhi's Most Polluted Day Of The Year

CHANDAN KHANNA via Getty Images
To go with India-environment-pollution,FOCUS by Trudy Harris In this photograph taken on December 18, 2015, Indian commuters travel on a polluted road near a bus terminus in the Anand Vihar District of New Delhi. Anger and alarm are rapidly rising throughout sprawling New Delhi over the air quality that the World Health Organization (WHO) has ranked the most hazardous on the planet. AFP PHOTO / CHANDAN KHANNA / AFP / Chandan Khanna (Photo credit should read CHANDAN KHANNA/AFP/Getty Images)

It was the most polluted day of the year in Delhi today with the authorities recording the highest levels of suspended particulate matters PM 2.5 and PM 10, taking the air quality into the 'severe' category across the city.

Although a definite conclusion could not be reached immediately, the experts attribute the spike to "open biomass burning", mainly burning of dry leaves to fight cold, across the region for the "extraordinary rise" in the levels of the particulate matters.

Also Read: This Man's Running Mask Speaks The Horrifying Truth About Delhi's Air Quality

The air quality across Delhi had plunged into 'severe' level post Diwali, but pollutants had shown a steady fall earlier this month.

The average of PM 2.5 (the tiniest and most damaging of all the particulate matters) and PM 10 were 295 and 470 micrograms per cubic metre respectively, which was multiple times above the corresponding safe limits of 60 and 100, centre's System of Air Quality and Weather Forecasting and Research (SAFAR) said.

Also Read: Delhi's Air Pollution Would Qualify As A Public Health Emergency

Severe category air quality affects healthy persons and seriously impacts those with existing diseases. China's capital Beijing has a system in place to alert citizens when pollution takes such hazardous turn, according to the National Air Quality Index.

SAFAR's Chief Project scientist Gufran Beig said the possible reasons for such a "huge jump", include a rise in the quantity of pollutants from the Indo-Gangetic plains that ranges from Eastern part of the country to the West, and a substantial rise in open biomass in Delhi and its surrounding areas.

Also Read: Inside Delhi's Greenest Building That Manufactures Its Own Air

"Medium range transport of pollutants from Indo-Gangetic Plains (rich in pollution) is highest at this time that brings pollution-rich air, which after reaching Delhi, gets downward and pollute Delhi surface. The IGP regions (Kanpur, Varanasi, Lucknow, Patna, etc.) has shown a huge increase in particulate matters," Beig said.

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