Air quality after Diwali – Artifex.News https://artifex.news Stay Connected. Stay Informed. Tue, 21 Oct 2025 17:34:00 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 https://artifex.news/wp-content/uploads/2026/05/cropped-cropped-app-logo-32x32.png Air quality after Diwali – Artifex.News https://artifex.news 32 32 Deepavali fireworks worsen Delhi’s air quality https://artifex.news/article70187181-ece/ Tue, 21 Oct 2025 17:34:00 +0000 https://artifex.news/article70187181-ece/ Read More “Deepavali fireworks worsen Delhi’s air quality” »

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People celebrate Deepavali in New Delhi on Monday, October 20, night.
| Photo Credit: Sushil Kumar Verma

Following Deepavali, pollution in Delhi inched close to a five-year high with average concentrations of particulate matter (PM) 2.5 across several locations crossing 400 microgram per cubic metre (µg/m³) – levels not seen since 2021.

On Deepavali day, nine cities out of the 293 monitored by the Central Pollution Control Board (CPCB) reported an air quality index (AQI) value of above 300, classed as ‘very poor’ air quality. On the day after Deepavali, Tuesday (for most of the country), this rose to 16 cities, according to data available on the organisation’s website. Nearly all of these fell in north India and in the Indo-Gangetic plains. Nationally, Dharuhera in Haryana reported the worst air quality index reading of 462 on Tuesday (October 21, 2025).

Sharp spike

An analysis of PM 2.5 trends, which was recorded by CPCB’s automatic air quality sensors, by independent weather-and-climate agency, Climate Trends, showed a sharp spike in particulate matter concentration from 4 p.m. on Deepavali day (October 20) in Delhi. From values of around 150 at 4 p.m., it spiked to nearly 650 by 11 p.m. This coincides with the period during which bursting firecrackers was legally permissible ( 8 p.m. to 10 p.m.) on Deepavali day, per the reprieve by the Supreme Court.

The SC, in its order, had allowed the use of only CSIR-validated ‘green crackers’, which reportedly exudes a minimum 30% less smoke than their traditional counterparts. However, the sheer volume of fireworks during the period, anecdotal reports of the unavailability of these firecrachers, and the air quality index of the day following Deepavali (Tuesday), suggest that these norms were violated.

A key parameter that determines air quality levels are wind speeds on the festival night as well as temperatures. When night temperatures are low, smoke and chemical pollutants hover like haze and will not rise to higher reaches of the atmosphere and get flushed out. Temperatures on Deepavali night this year ranged from 23-25 degree C, the warmest in five years but low wind speeds and the quantity of smoke retarded its egress out the Delhi and the Gangetic plain airshed.

“When examined together, PM 2.5 and temperature data reveal a consistent pattern: high emissions from fireworks and low night-time temperatures jointly contribute to elevated PM 2.5 concentrations. The sharp post-Deepavali spikes indicate both sustained emissions and poor atmospheric dispersion,” the Climate Trends report notes.

“The Diwali of 2025 was one of the most polluted in recent years. The spike between the nights of the 19th and 20th directly corresponds to the widespread use of firecrackers across Delhi-NCR. Moreover, visuals and ground data confirm that burning so-called ‘green’ crackers made no measurable difference compared to regular ones. It’s now evident that allowing firecrackers during this time of year is simply not sustainable for the NCR region’s already critical air quality,” Palak Balyan, Research Lead, Climate Trends, said in a statement.

A perusal of the AQI values on Deepavali and the subsequent day on the CPCB website show that in 2023, Delhi’s post-Deepavali (November 13) AQI was 358 (very poor) – close to the 351 (very poor) reported at 4 p.m. this year. The five-year record, however, was on November 5 in 2021, when it recorded 462 (‘severe’). Deepavali AQI this year in the city was 345, only topped by Deepavali AQI of 382 on November 4, 2021.

The CPCB presents an annual report of air quality and noise-pollution levels nationally on Deepavali night and following day. It is expected later this week. The Environment Ministry didn’t offer any comment or analysis of the Delhi air quality on Tuesday.



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Post-Diwali smog pushes Delhi air quality to ‘very poor’; other cities also affected https://artifex.news/article68818238-ecerand29/ Fri, 01 Nov 2024 03:31:34 +0000 https://artifex.news/article68818238-ecerand29/ Read More “Post-Diwali smog pushes Delhi air quality to ‘very poor’; other cities also affected” »

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Vehicles ride past on an expressway on a smoggy morning in New Delhi, India, October 31, 2024.
| Photo Credit: Reuters

A thick layer of smog covered parts of Delhi on Friday (November 1, 2024), the day after Diwali, pushing the city’s air quality into the ’very poor’ category, according to the Central Pollution Control Board (CPCB).

Most areas in the capital recorded an Air Quality Index (AQI) over 350, raising health concerns for residents. At around 7:00 a.m., Anand Vihar recorded an AQI of 395, Aya Nagar stood at 352, Jahangirpuri at 390, and Dwarka reached 376.

All these areas reported ‘very poor’ air quality levels, posing significant health risks.

Cyclist Stephen, passing through India Gate, where the AQI stood around 317 post-Diwali, said, “Because of the pollution, terrible things are happening. The pollution came on very suddenly this time. Just a few days ago, there was nothing, and now my brother has fallen sick. I used to come here to cycle with my brother, but he has been severely affected by the pollution lately. And today, the pollution is extreme.”

“There were so many fireworks and other things yesterday that I couldn’t even sleep. We’ve been really troubled; my brother is in terrible shape. What else can we do? It’s taking a toll on his body — his throat hurts, it’s hard to breathe, he has a cold, and his eyes are irritated. There’s so much; we don’t even know everything that’s happening. While cycling, it’s hard to keep our eyes open,” he added.

“I came here to go cycling, but now it’s a big problem. There’s a lot of coughing, and I’m having trouble cycling. This pollution is much worse, especially due to the fireworks, bombs, and kids playing with fireworks. It’s even affecting vehicles, and it’s really bad. It could lead to cancer or other serious illnesses,” another cyclist, John, told ANI.

The pollution issue wasn’t limited to Delhi; several other cities across India, including metropolises like Chennai and Mumbai, reported similar conditions, with smog and poor air quality affecting large areas. The CPCB data shows significant pollution levels, especially after Diwali celebrations, raising concerns about air quality and potential health impacts nationwide.

Earlier on Thursday (October 31, 2024), Delhi Environment Minister Gopal Rai spoke about the preparations the Delhi government was implementing post-Diwali. Speaking to ANI, he said, “The Air Quality Index (AQI) in Delhi remains in the ‘very poor’ category, with some areas showing extremely high levels. With Diwali tonight, it’s an important night for Delhi and its people. I request everyone to avoid burning crackers to help control pollution across the state. Delhi’s air quality remains ‘very poor.’ Today being Diwali, tonight is critical for us. Let’s celebrate by lighting diyas and sharing sweets, but we must avoid crackers to protect the children and elderly at home.”

Gopal Rai further stated, “I believe that if the people of Delhi avoid burning crackers, the city will not witness the usual post-Diwali smog. I request everyone to avoid crackers and the pollution they cause, to ensure everyone at home remains safe.”

When asked about the selling of crackers in the city, the Delhi Environment Minister mentioned that Delhi Police would increase patrolling at night to monitor the situation. “The police are actively working to control the sale of crackers. Patrolling will be increased at night for safety. But I still ask, why is it necessary to burn crackers? As human beings, it’s our duty not to pollute the city,” he underlined.

Gopal Rai also shared that the Delhi government is monitoring the situation closely. “We are addressing incidents of firecracker use, and the police are working on this on the ground. Such activities at night will also be addressed. But more than enforcement, it’s our duty to protect our environment. We are monitoring everything, and the Delhi government will take necessary steps as the situation demands,” he added.



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