Delhi Chokes On Diwali Morning: Anand Vihar's AQI Slips Into 'Severe' Zone

Diwali in the national capital this year saw air quality levels plunge into the Very Poor' category a stark contrast to festive spirit. Data from the Central Pollution Control Board (CPCB revealed a significant deterioration, with the Air Quality Index (AQI) reaching 329 at 7 am on Diwali day, a notable drop from 274 at 8 am the previous day. This decline in air quality enveloped the city in a dense layer of smog by morning, highlighting the environmental impact of Diwali celebrations.

Last Diwali, observed on November 12, presented a different scenario, where Delhi experienced its most favorable air quality in eight years. The average AQI then was recorded at 218, marking a considerable difference from this year's figures. The worsening air quality is not just a day's concern but reflects a broader environmental issue that intensifies during Diwali.

The air quality readings across different areas in Delhi revealed alarming levels of pollution. Anand Vihar topped the list with an AQI of 419, categorizing it as 'Severe'. Other areas such as Ashok Vihar and Burari Crossing also reported high pollution levels with AQIs of 368 and 353, respectively. Locations like Chandni Chowk, IGI Airport (T3), and Jahangirpuri recorded AQIs of 301, 303, and 395, underlining the widespread nature of the pollution.

The Indian Institute of Tropical Meteorology (IITM), Pune, had already forecasted that the air quality would hover in the 'Very Poor' category, with AQIs ranging between 300 and 400 for the Diwali period.

They warned that the situation could escalate to 'Severe' if additional pollution from firecrackers and the burning of stubble or waste was factored in. The Decision Support System (DSS) for Air Quality Management indicated that stubble burning, consistent with the levels of the past five years, would contribute 15-18% to Delhi's pollution during this time. This situation is further aggravated by northwesterly winds, which are likely to bring more smoke into the city.

Delhi-NCR's air quality is managed under the Graded Response Action Plan (GRAP), which categorizes pollution levels into four stages: 'Poor', 'Very Poor', 'Severe', and 'Severe Plus'. These classifications are determined by specific AQI ranges, with 'Poor' ranging from 201 to 300 and 'Very Poor' from 301 to 400. The 'Severe' category spans AQIs of 401 to 450, and anything above 450 is considered 'Severe Plus'. This system is part of emergency measures aimed at reducing air pollution during the winter months, when the city is most vulnerable.

As the city grapples with the aftermath of Diwali celebrations, the elevated pollution levels serve as a reminder of the ongoing battle against air pollution. The data and forecasts underscore the need for concerted efforts to mitigate environmental damage and safeguard public health, especially during times of celebration.