Published On: Mon, Oct 31st, 2016

Air quality dips in Delhi, a day after Diwali

New Delhi: A severe dip in air quality was observed in Delhi during the Diwali weekend due to bursting of crackers and adverse weather conditions, an air quality review by the state government said on Monday.

The safe level for PM 10 is under 100 microgram/cubic metre

The safe level for PM 10 is under 100 microgram/cubic metre

The review was done to map the adverse impacts on air quality during the last three days, including Diwali on Sunday.

The assessment of Ambient Air Quality was undertaken at six locations, that is, RK Puram, Mandir Marg, Punjabi Bagh, Civil Lines, Anand Vihar and IGI Airport. Noise levels at the above-mentioned locations were also monitored, except for the airport.

As per the review, the carbon monoxide (CO) levels on Diwali ranged from 2.0 mg/m3 to 4.2 mg/m3 (microgram/cubic metre) in comparison with 1.1 mg/m3 to 4.0 mg/m3 during last year’s Diwali.

Particulate Matter 10 or PM10 levels ranged from 448 µg/m3 to 939 µg/m3, a steep increase from last Diwali’s 296 µg/m3 to 778µg/m3.

PM 10 is called so because of its diameter which is 10 micrometre or less. To put it in perspective, a human hair is 100 micrometre wide.

Another harmful pollutant, PM 2.5, ranged from 180 µg/m3 to 440 µg/m3. These are fine particles which emanate from automobiles, burning of wood, and construction material. They are responsible for making the atmosphere hazy marked by low visibility.

PM 2.5 is one of the most harmful pollutants and can easily percolate and get stuck in lungs, causing respiratory problems, sneezing, coughing and shortness of breath.

The safe level for PM 10 is under 100 microgram/cubic metre and PM 2.5 is under 60 microgram/cubic metre, as per the System of Air Quality and Weather Forecasting And Research (SAFAR).



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