New Delhi

A thick layer of smog surrounded parts of the national capital on Friday morning as Delhi's air quality remained in the lower end of the 'very poor' category with an overall Air Quality Index (AQI) of 324.

The National Capital Region (NCR) also continued to witness bad air as Noida and Gurugram also registered "very poor" air quality with an AQI of 371 and 349 respectively.

The level of PM 2.5 and PM 10 was recorded at 178 in the 'very poor' category and 303 in the 'poor' category respectively in Delhi.

AQI recorded at all major monitoring stations in the national capital also stood in the 'very poor' category.

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'.

Amid the thick layer of smog blanketing the national capital, the Delhi International Airport Limited (DIAL) has issued a passenger advisory due to low visibility.

According to the Indian India Meteorological Department (IMD), the minimum temperature is expected to remain around 16 degrees Celsius while the maximum temperature is likely to be 29 degrees Celsius.

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Meanwhile, with an aim to boost the joint and augmented approach towards prevention, control and abatement of the menace of air pollution in Delhi-NCR, the Commission for Air Quality Management in NCR and Adjoining Areas (CAQM) has decided to tap the technical or academic expertise of the reputed scientific institutions working in the field of air pollution.