Kolkata's Kali Puja-Diwali exceeds air and noise pollution levels with limitless bursting of illegal firecrackers

Kolkata awoke to a sobering reality: the Kali Puja-Diwali had unleashed a cacophony of illegal noise-making that not only shattered the city's fragile peace but also propelled air and sound pollution far beyond safe thresholds, turning a cherished festival into an environmental alarm bell. In residential hubs like Kolkata's Tangra and Kalikapur, decibel levels spiked to a deafening 73 and 58 respectively—more than double the mandated 45 dB cap for populated areas between 10 PM and 6 AM—while silent zones fared no better, with College Street area clocking 64 dB and Jadavpur hitting a blaring 78 dB near its gates. Compounding the auditory assault, the air turned acrid with PM2.5 concentrations soaring to 169 in Ballygunge, 204 in Jadavpur, and a hazardous 259 at Dharmatala area by 11 PM, classifying the quality as 'poor' to 'very poor' per national standards, where levels above 200 signal immediate health risks from fine particulates laden with black carbon and toxins.

This surge, largely fueled by rampant burning of organic and solid waste alongside banned fireworks, has environmentalists decrying a blatant disregard for regulations, as vulnerable groups—from asthmatic children to elderly heart patients—gasp through the haze, questioning if celebration must come at the cost of collective well-being.The second day brought little reprieve, with monitoring stations across the metropolis registering persistent violations that painted a grim portrait of unchecked revelry.North Kolkata;s Girish Park-Hedua area trembled at nearly 73 dB, and Laketown's quiet lanes reverberated with 60 dB of unrelenting blasts, flouting the 40 dB limit for silence zones and amplifying stress on urban nerves already frayed by daily chaos. Air quality, too, refused to rebound; Newtown's outskirts reported a chilling PM2.5 of 199, teetering on the 'unhealthy' edge where even healthy lungs feel the burn, and Howrah's adjacent pockets plunged into 'severe' territory, per West Bengal Pollution Control Board data.

Experts attribute this to the indiscriminate firecracker frenzy spilling beyond the 8-10 PM window, a violation that not only exceeds daily PM10 and PM2.5 tolerances of 100 and 60 micrograms per cubic meter but erodes the annual safe averages of 60 and 40, potentially seeding long-term respiratory woes and cardiovascular strains in a city already choking on vehicular fumes and industrial effluents. Kolkata Police confirmed 640 arrests for disorderly conduct, illegal fireworks, and gambling, alongside seizures of 852 kg of banned explosives and 68 liters of liquor, mark a robust crackdown, with pollution metrics allegedly lower than last year and milder than in other metros. As Diwali's glow merges with Kali Puja's fervor, this toxic pollution levels prompts a deeper introspection.