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 concentrations of PM 2.5 and PM 10 stood at 252 in the 'poor' and 131 in the 'very poor' category respectively.
Authorities said Delhi's air quality may get pushed to the "poor" zone on Wednesday and to the very poor category over the next five days because of an increase in stubble burning.
Ministry of Earth Sciences' forecast body SAFAR said the city's Air Quality Index (AQI) was recorded as 350, which falls in the 'very poor' category with PM2.5 as the lead pollutant.
According to the report of CPCB, the Sector-51 area of the city was the most polluted, recording AQI at 359 SPM and in that too, the average amount of PM2.5 particles were recorded up to 325 micrograms per household meter.
The higher the AQI value, the more polluted the air. An AQI above 200 is considered poor while that above 300 is categorised as very poor by the CPCB.
With the onset of winter and the withdrawal of monsoon in the northwest region of the country, the wind changes direction from easterly to north-westerly.
Delhi Chief Minister Arvind Kejriwal said that there are chances that the air quality could deteriorate again from October 10.
The findings of recent research from the University of Colorado Boulder suggests that even though reusable cloth masks might seem bad for wearing but washing and drying them doesn't reduce their ability to filter out viral particles.
New Delhi will witness a partially cloudy sky on Tuesday, however, there is no possibility of rain yet.
Air Quality Management Commission has directed Uttar Pradesh, Haryana, and Rajasthan to prepare a time-bound action plan to shift all identified industries units in NCR to piped natural gas (PNG).
Parliament on Thursday gave its nod to a bill that seeks to set up a commission for air quality management in the National Capital Region and its adjoining areas.
Apart from Delhi, there are 19 districts around the national capital, sources from which affect pollution levels in Delhi. This latest model can help avoid trial and error and blind decisions.
The predominant pollutant will be PM10 as the strong surface winds are favorable for raising dust locally and transport of dust from nearby region, said the the National Weather Forecasting Centre of the IMD.
The findings, published in the journal Environmental Research, provide a strong evidence for potential environmental benefits through larger scale policy implementation.
According to the National Weather Forecasting Centre of IMD, the predominant pollutant will be PM10. The strong surface winds are favourable for raising dust locally and for transporting of dust from nearby region.
The air quality of the national capital improved to the 'moderate' category on Sunday as the overall Air Quality Index (AQI) stood at 159.
According to the Central Pollution Control Board (CPCB), several spots in the city reported AQIs at the higher end of the 'severe' category including RK Puram (492), Dwarka Sec-8 (497), Ashok Vihar (472), Shadipur (443) and North Campus (448) among many others.