Gurgaon: Smog Solid enveloped the city on Friday morning because the air quality index (AQI) crashed into a ‘severe’ sign a day (472) for the first time this year.
According to data from the Central Pollution Control Agency (CPCB), the level of Gurgaon pollution on Friday was the worst for that day after Diwali in the last six years.
Aqi of all five stations from where the CPCB arranged on the data in Gurgaon – Vikas Sadan, Gland Pahia, Teri Gram, Sector 51 and Manesar – everything is at the ‘severe’ level.
Aqi City in Diwali (Thursday) was ‘very poor’ at 395.
Although there was a total ban on sales and the use of firecrackers, which was difficult to tell at night Diwali with Cracker continuously accompanying the celebration and lighting the sky.
According to data from CPCB, Aqi was 298 a day after Diwali (October 31) in 2016, while at 397 on the appropriate day in 2017 (October 30).
In 2018, Aqi was recorded at 389 on the day after Diwali (November 8), while it was 368 in 2019 (October 28).
Last year, it was 460 on the appropriate day (November 15).
Apart from PM2.5 and PM10, other large pollutants such as nitrogen oxide, sulfur dioxide, nitrogen dioxide, nitrogen monoxide and ozone also showed a post-diving surge compared to last year, according to data from the state pollution control agency Haryana (HSPCB).
Dispersion of slow pollutants this year due to a calm wind, said an HSPCB official.
“This year, the level of pollutants remains high for several reasons, such as decreasing temperatures and wind speeds.
As a result, we have a higher AQI post diwali.
In addition, the cracker incident exploded higher this time compared to the last year because there was no lock now.
The Covid case also dropped significantly, the movement of people had increased, which contributed to the increase in pollution as well, “said HSPCB Regional Officer for Gurgaon (North) Kuldeep Singh to Ti.
Former CPCB head Dr.
Dipankar Saha said, “Crackers have little relationship with increasing pollutants.
Pre-diwali AQI is always higher because of the increase in vehicle movements.
In addition, the average for the last 24 hours was reflected in the overall AQI the following day.
Decreasing meteorological conditions Problems.
“However, Saha added,” It is urgent to have AQI data per hour on all critical days or when firecrackers tend to explode.
Only ‘moderate’ AQI must be a criterion to allow exploding crackers.
Regulators may need to review the criteria for crackers The explodes.
If green crackers make Aqi ‘severe’, the effectiveness needs re-evaluation.
“The day after Diwali, the PM10 level was recorded at 255.07 μg / m3 in 2019, which slipped to 233.48 μg / m3 on the day according to next year.
However, this time it jumped to 670.6 μg / m3 on Friday.
PM2.5 level reflects a similar trend – while it was 933.3 μg / m3 on the day after Diwali in 2019, it decreased to 633.1 μg / m3 in 2020 and soared to 838 μg / m3 this year.
“We expect pollutants to start cleaning from November 7 and so on, when wind speeds will increase,” HSPCB regional officers to Gurgaon (South) Sandeep Singh.
A Smokescape: Aqi ‘Severe’ First this year
