According to the information provided by the US Embassy on air polling till 7 November, the level of PM 2.5 in Calcutta is 176 pm. Which is nearly three times the tolerance According to ‘Air quality index’, if the PM 2.5 level is between 100 and 200, then it’s called ‘Moderate Pollution’. In this type of pollution, there is a risk of chronic respiratory problems and difficulty in cardiovascular problems starting from lung infection. According to experts there is about four times the level of pollution in Calcutta sky in Deepawali.
According to the World Health Organization or WHO pollution level, the PM5 has a normal level of 60 PM. That is, the average of 60 mg per cubic pollution There is about 2.5 times the level of PM 2.5 in air pollution in Kolkata, about four times from normal. US Consulate in Calcutta regularly monitors the subject of air pollution. According to the information provided by the US Embassy on air pollution till 7 November, the level of PM 2.5 in Calcutta is 176 PM.