Kolkata's Air Quality Dips to Moderate as Winter Looms

Kolkata's average air quality index (AQI) has fallen to a "moderate" level, a decline from the "satisfactory" ratings observed earlier in the week. This change is attributed to the temporary clearing effect of a recent sharp rainfall event that washed away accumulated pollutants.

However, environment scientists anticipate a continued downward trend in air quality as the winter season approaches. This seasonal phenomenon, where lower temperatures and reduced wind speeds cause pollutants to linger, is a recurring concern for the city. Moderate AQI levels can trigger breathing discomfort in individuals with pre-existing lung, asthma, or heart conditions.

Further concerns about potential spikes in pollution arise from the possibility of firecracker usage during upcoming festivals like Chhath Puja. The state pollution control board reported a high volume of complaints during recent Diwali celebrations, indicating the significant impact of such activities on air quality, especially when combined with unfavorable winter atmospheric conditions.