Business Standard

Delhi's AQI 'severe' again; stubble burning behind 27% of PM2.5 pollution

The share of farm fires in Delhi's pollution rose to a three-year high of 48 per cent on Sunday

air pollution | Delhi air quality | Stubble burning

Press Trust of India  |  New Delhi 

Delhi air pollution stubble burning

Delhi's air quality slipped to the "severe" category again on Tuesday with accounting for 27 per cent of its PM2.5 pollution, authorities said.

Low temperature -- Delhi recorded a minimum of 13.5 degrees Celsius on Tuesday, the season's lowest so far -- allowed accumulation of pollutants, said Mahesh Palawat, vice president (meteorology and climate change), Skymet Weather.

The minimum temperature is expected to dip to 10 degrees by November 15, the India Meteorological Department said.

According to the Central Pollution Control Board, Delhi's 24-hourly average air quality index stood at 404 at 4 pm, up from 390 on Monday.

An AQI between zero and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor", and 401 and 500 "severe".

The share of farm fires in Delhi's pollution rose to a three-year high of 48 per cent on Sunday.

On Monday, government agencies reported 5,450 farm fires, the highest this season, in neighbouring states of the national capital.

Palawat said the share of in Delhi-NCR's is expected to remain high for another week.

"No major improvement in air quality is likely in the next four to five days," he said.

Delhi recorded "severe" air quality for three days on the trot till Sunday due to accumulation of emissions from fireworks on Diwali and amid unfavourable meteorological conditions -- low temperature, wind speed and mixing height.

Last year, the share of stubble burning in Delhi's pollution had peaked at 42 per cent on November 5.

In 2019, crop residue burning accounted for 44 per cent of Delhi's PM2.5 pollution on November 1.

(Only the headline and picture of this report may have been reworked by the Business Standard staff; the rest of the content is auto-generated from a syndicated feed.)

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First Published: Tue, November 09 2021. 20:20 IST