An AQI between zero 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.
This step has been taken to combat Delhi's air pollution and achieve net carbon neutrality, making it the first state in India to adopt an aggregator policy to regulate vehicular emissions from the ride-hailing industry.
Meanwhile, the air quality of Noida remains in the 'moderate' category with the AQI at 119. However, the air quality of Gurugram improved to the 'satisfactory' category with the AQI at 81.
The level of PM10 (226) and PM2.5 (122) pollutants in the air were recorded in the moderate and very poor categories, respectively with the latter being the major source of pollutant in the city.
Meanwhile, the air quality of NCR region like Noida, Gurugram remains in 'severe' and in 'very poor category respectively.
The overall Air Quality Index (AQI) in Delhi stands at 425.
Delhi's air quality remained in the 'very poor' category on Wednesday. In the neighbouring Noida, the AQI was in the 'severe' category.
The Commission for Air Quality Management (CAQM) had stayed the ban on construction and demolition works in Delh, barring those in selective sectors, in wake of the deteriorating air quality index.
According to the System of Air Quality and Weather Forecasting And Research (SAFAR), the concentrations of PM 2.5 and PM 10 stood at 117 in the 'poor' and 193 in the 'moderate' category respectively.
The NGT has issued directions relating to restrictions on registration and plying of diesel vehicles more than 10 years old and petrol vehicles more than 15 years old in the Delhi- NCR.
Delhi is likely to witness 'shallow fog' today with the mercury dropping to as low as 8 degrees Celsius, as per the India Meteorological Department (IMD).
Delhi's air quality remained in the 'severe' to 'very poor' category since early November. The main reasons for poor air quality include stubble burning in neighbouring states, vehicular pollution and unfavourable wind condition.
The air quality of neighboring Noida has also slipped to the 'very poor' category. The AQI in the NCR region stands at 333.
The air quality and weather bulletin for Delhi-NCR, said: "The air quality over Delhi-NCT is likely to deteriorate marginally and remain in poor to lower end of very poor category on December 13. The air quality is likely to remain 'very poor' category on December 14 and 15.
As per the government agencies, an AQI between zero 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'.
An AQI between zero 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.
According to the System of Air Quality and Weather Forecasting And Research (SAFAR), the level of PM 2.5 and PM 10 in the air at 9 am stood at very poor and moderate levels, respectively.
In view of the air quality standard, SAFAR issued an advisory to reduce heavy exertion. According to SAFAR prediction, the AQI in national capital will deteriorate to 321 and will remain in the 'very poor' category on Tuesday.
Delhi Government has now made the use of ASGs mandatory for all construction agencies in the national capital as a tool to combat pollution. Detailed guidelines regarding the use of water droplets, nozzles have also been issued in this regard.
The PM 10 level were recorded at 255 in the 'poor' category and PM 2.5 levels were recorded at 132 in the 'very poor' category, as per thr SAFAR.
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