Vastavam web: Delhi’s air quality remained in the ‘severe’ category on Friday despite a slow but “significant” improvement in pollution levels with the AAP government restricting the entry of heavy and medium goods vehicles into the national capital as an emergency measure. Government-run agency SAFAR said that the city’s air quality would remain in the severe category till Saturday, as the already toxic situation caused by smoke from fireworks is likely to aggravate further due to intensified stubble burning in neighbouring states.
Despite severe pollution, stray incidents of firecracker burning were reported from various localities in the national capital on Thursday night. Delhi’s air quality on Thursday went off the charts to the “severe plus emergency” category. The city recorded the overall air quality index (AQI) of 642, according to System of Air Quality and Weather Forecasting And Research (SAFAR).
It said the city’s air quality has “improved significantly” since Thursday, but the recovery was slow due to low surface wind speed. The AQI was recorded in the severe category at 453 on Friday, according to data from the Central Pollution Control Board (CPCB). On Friday, the PM2.5 (particles in the air with a diameter of less than 2.5 micrometres) level was recorded at 303 gm-3, five times the permissable limits.
The PM10 (particles in the air with a diameter of less than 10 micrometres) level was recorded at 440 gm-3, four times the permissable limits, according to SAFAR. An AQI between 0 and 50 is considered “good”, 51 and 100 “satisfactory”, 101 and 200 “moderate”, 201 and 300 “poor”, 301 and 400 “very poor”, and 401 and 500 “severe”.
Elaborating on it, the weather forecast system said the air in the surrounding stubble-burning areas is already heavy due to increased moisture and pollutants.This heavy air will travel towards Delhi, where a similar situations exists, in the next 24 hours. This combined effect might add to the pollution woes. “There is a possibility that the wind may pick up at the upper level, late in the night and push the level of pollution and keep it in severe zone tomorrow with intensified fog which will further trap the pollutants,” it said.
The entry of heavy and medium goods vehicles into the national capital has already been banned for three days beginning 11 pm on Thursday night as a measure to check air pollution in Delhi. According to Alok Kumar, joint commissioner of police (Traffic), 1,008 vehicles were allowed in the national capital between 11 pm on Thursday and 6 am on Friday as they were carrying essential goods. As many as 445 vehicles were returned from Delhi’s borders, he added.