Delhi breathes normal air in December, probably the first in three years

Delhi's average Air Quality Index was 194, marking a significant improvement from yesterday's 282 on a scale of 500, classified as 'poor'.

Published: 07th December 2017 08:43 PM  |   Last Updated: 07th December 2017 10:20 PM   |  A+A-

A traffic policeman wearing an anti-pollution mask mans traffic amid smog and air pollution in New Delhi. | PTI File Photo

Pollution is considered severe plus or emergency when readings of PM2.5 and PM10 cross 300 and 500 ug/m3, respectively. The corresponding prescribed standards are 60 and 100.

By PTI

NEW DELHI: Delhi's air quality today improved further with the AQI shifting to 'moderate' zone as breeze cleared up the hazy sky bringing relief to people in the national capital.

The city's average Air Quality Index (AQI) was 194, marking a significant improvement from yesterday's 282 on a scale of 500, classified as 'poor'.

From November 23 to December 5, the air quality in the city had remained 'very poor', with toxic smog disrupting normal life and even the India-Sri Lanka Test match at the Feroz Shah Kotla Stadium. However, it had shown a marked improvement yesterday from Tuesday's index of 378.

According to the Central Control Room for Air Quality Management of the CPCB, the concentration of nitrogen dioxide (NO2) breached the 24-hour safe limit of 80 micrograms per cubic metre (ug/m3) in areas such as R K Puram (139.27), Anand Vihar (104.27) and Dilshad Garden (85.20) in the evening.

Though the air quality index had improved to 'poor' yesterday, a toxic haze continued to envelope parts of Delhi with the atmosphere being laden with NO2 and other pollutants.

The smog in Delhi had even cast a shadow on the India-Sri Lanka Test match at the Feroz Shah Kotla Stadium, with captain Dinesh Chandimal and his team wearing N95 anti-pollution masks to combat pollution on Day two.

The match ended in a draw yesterday with Chandimal admitting that it was tough playing under pollution. Some of the Sri Lankan players had fallen sick.

Dipankar Saha, Air Lab Chief of the Central Pollution Control Board (CPCB), had yesterday said, "Air quality is improving every hour and we hope it will continue to improve." "Now the wind is blowing very easily from north to south with a speed of 4.5 m/s, which has resulted in dispersion of pollutants, leading to improvement in the air quality after a long pause," he had said.

The United Nations on December 5 marked the first International Smog Day. It is a moment to remember all of the people who have died prematurely, and avoidably, because of the air pollution, the United Nations Environment Programme had said in a statement.

Pollution is considered severe plus or emergency when readings of PM2.5 and PM10 cross 300 and 500 ug/m3, respectively. The corresponding prescribed standards are 60 and 100.

An AQI between 0-50 is considered good, 51-100 satisfactory, 101-200 moderate, 201-300 poor, 301-400 very poor, and 401-500 severe.

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