Kolkata becomes most polluted metro, air quality index worse than Delhi


KOLKATA: From past 72 hours, Kolkata’s air quality index is getting worse than the national capital,  making it the most polluted metro city in the country.

The overall PM 2.5 count at Kolkata’s Rabindra Bharti University (RBU) on Thursday was 381, compared to 292.25 in Delhi’s Ashok Vihar, one of the capital’s most polluted localities. There are 19 automatic stations in Delhi to monitor the city’s air quality as compared to only two in Kolkata.

An AQI level between 201-300 is considered to be “poor” while those between 301-400 is considered to be “very poor”. An AQI level between 401-500 is considered to be “severe”. Auto emission expert Somendra Mohan Ghosh said, “While Delhi has gone ahead with odd-even experiment, Kolkata has chosen to sit tight and ignore the issue.

Meanwhile, the report mentioned that Kolkata’s air quality routinely gets toxic during winter as the temperature traps finer particulate matter closer to ground. However, for both Kolkata and Delhi, PM 2.5 remained the most prominent pollutant.

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