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Delhi's air quality recorded in 'very poor' category, authorities warn of deterioration

Press Trust of India  |  New Delhi 

Delhi's air quality was recorded in 'very poor' category on Tuesday as wind continued to blow from regions where there is rampant stubble burning, authorities said, warning of severe spike in levels after even if "partial toxic crackers" are burnt compared to last year.

The overall Air Quality Index (AQI) was recorded at 394, which falls in the 'very poor' category, according to data by the Central Control Board.

On Monday, the AQI was recorded at severe category of 434, the highest of the season, it said.

On Tuesday, the PM2.5 (particles in the air with a diameter of less than 2.5 micrometres) level was recorded at 243 while the PM10 (particles in the air with a diameter of less than 10 micrometres) was recorded at 372 in

In NCR, the PM2.5 was recorded 237 and PM10 was recorded at 366, the CPCB data said.

An AQI between 0 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'.

Twenty areas in recorded 'severe' air quality, while 13 areas recorded 'very poor' air quality.

Authorities attribute the continuous to the change in wind direction, which is now blowing from the direction of areas of and

About 14 per cent of the PM2.5 pollution in Delhi was caused due to stubble burning, while 33 per cent of the PM2.5 pollution in Delhi on Monday was caused due to stubble burning, authorities said.

Winds coming from North-westerly direction is bringing influence of biomass burning pollutants in Delhi-which may continue up to Wednesday morning, the said.

Delhi's air quality is expected to deteriorate to 'severe plus emergency' category after Diwali, the Centre-run System of Air Quality Forecasting and Research (SAFAR) said.

"Even if 50 per cent of the total load of toxic fire crackers as compared to Diwali-2017 is added, the prevailing weather conditions will aggravate the high smoke level and make air quality to persist in severe range for at least two day on November 8 and November 9," the SAFAR said in a report.

The PM10 is expected to reach 575 and PM2.5 is expected to reach 378 a day after Diwali, recording the worst air quality of the year, it said.

(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)

First Published: Tue, November 06 2018. 12:15 IST