Patna: Most of the cities in the country recorded an annual particle (PM) increase in level 2.5 in 2021 after the initial decline at the level of air pollution in 2020 due to covid-induced locking, in accordance with the new analysis of regional pollution trends carried out by Delhi .
-Dased center for science and environment (CSE).
Analysis, released on Monday, shows that the annual average of Muzaffarpur PM2.5 has jumped from 74 micrograms per cubic meter (μg / m3) in 2020 to 78 in 2021 while the annual average Patna PM2.5 rose to 64 on In 2021 against 64 μg / m3 in 2020.
The annual average level of PM2.5 in Hajipur was 60 μg / m3 and 49 μg / m3 in style.
Track the level of pollution in your city, the national limit is 40 micrograms while the world health organization recently sets annual standards for PM2.5 is 5 micrograms.
PM2.5 is a small particle in the air which reduces visibility and triggers several diseases, including fatal like cancer.
According to experts, Muzaffarpur requires a reduction in the annual average PM2.5 level of 49% to meet the clean air standards, Patna by 45%, Hajipur is 33% and an 18% style.
This report was made on the basis of real-time air pollution data produced by the Central Pollution Control Agency (CPCB) at 13 stations in four cities Bihar between 2019 and 2021 – six stations in Patna, each of three in Muzaffarpur and Style and One in Hajipur .
The only silver layer is that very polluted days are not recorded in one of the four cities for 2021.
However, the highest part of the “very poor” day in Muzaffarpur at 93, followed by 67 on Patna.
The winter smog that swallowed North India during early November began to extend east during the end of December and early January.
The trend continued because the Patna air quality index was recorded at 271 in the ‘poor’ zone on Tuesday.
Patna has registered 2.5 times the increase in the number of nitrogen dioxide in the air from all cities in the state during December compared to the previous months.
On Patna and Kolkata, the high level of NO2 lasted until midnight.
In the term absolute concentration, Patna registered the highest monthly average of 51 UG / M3 in December.
Patna and Howrah have the greatest buildup of pollution on the night, with an increase of 3.3 times at night PM2.5.
The overall concentration of the PM2.5 / PM10 ratio in Bihar was higher during the winter (November to January) when floating around 55%.
Style has the highest PM2.5 / PM10 ratio in all three seasons – summer, monsoon and winter with PM 2.5 shares as high as 73% in winter.
Hajipur shows a high percentage of PM2.5 / PM10 ratio during the rainy season at 51%.
Air quality in 4 cities Bihar returns to pre-covid levels
