Kolkata: Rain in December ensures that the city gets a break from experiencing severe pollution to what is usually the most polluted month of this year.
There was no one day in December 2021 when Aqi violated the 401 mark which showed heavy pollution.
Usually, December and January are the worst month of a year when air quality deteriorates dramatically in Kolkata, sometimes even exceeds Aqi Delhi.
In 2020, a year was marked by locking when the number of vehicles on the road had dropped dramatically and many commercial activities were closed for months, Kolkata only experienced a severe day.
It was recorded at the Sustainable Ambient Air Quality Monitoring Station (CAAQMS) at Rabindra Bharati Kolkata University in BT Road, which usually recorded the worst city quality of the city.
One of the biggest reasons for repairs in the December ambient air in 2021 was meteorology.
Heavy rain in early December, while being a disaster for agriculture, came as a blessing for air around the city.
It not only cleans the atmosphere of the pollutant but carry a good one or two (Aqi: 0-50) and two to three satisfying (AQI: 51-100) air in December.
This is rare.
“The impact of meteorology on city air quality is extraordinary.
This is why air quality experiences a magical transformation from the beginning of spring.
But our sustainable mitigation measures also provide very effective results.
But it is at the tip of the indo-gangetic plain tail, Kolkata has His geographical losses were acting like a sink for the regional atmospheric pollutants, “said Chairman of the Bengal Bengal Polution Control Board Kalyan Rudra.
However, with drastic reduction ‘severe’ and ‘very poor’ (AQI 310-400) days, there is a ‘poor’ increase (AQI: 201-300) day.
“If poor days are also reduced, there will be significant air quality improvements in the city, ” said a WBPCB scientist.
The study of the Aqi City calendar revealed the relegation of the worst air quality in Salt Lake, where very bad days increased from eight in 2020 to 15 in 2021 and poor days were slightly reduced from 1821.
Fortress William experienced the best ambient air recovery with very bad days reducing from seven in 2020 to only one in 2021 and days Bad remains constant at 13.
Moderate days also reduced from seven to four.