New Delhi, December 31: The air quality in the national capital deteriorated on Friday slipping to 'very poor' category, according to the System of Air Quality and Weather Forecasting And Research (SAFAR). The overall Air Quality Index (AQI) on Delhi was recorded this morning at 308.

The concentrations of PM 2.5 and PM 10 stood at 130 in the 'very poor' and 237 in the 'moderate' category respectively. According to the SAFAR bulletin, New Year celebrations on December 31 night may increase emissions and worsen the air quality but the net effect is likely to keep AQI within 'very poor' or 'higher end of very poor' for the next three days.

"AQI today indicates 'Very Poor' air quality. Prevailing cold wave conditions in the northwest region of Delhi and winds blowing from the west/northwest direction affect weather in Delhi. However, minimum and maximum temperatures show a tendency to increase slightly for the next 3 days (December 31, January 1 and January 2). Consistently high wind speeds are likely for the next three days. Mixing layer height continues to be 1.0 - 1.5 km," SAFAR said in its bulletin. Delhi Air Pollution: Air Quality in National Capital Slips to 'Severe' Category, AQI Stands at 430.

While the air quality of Noida remains in the 'very poor' category with AQI at 304 and air quality of Gurugram is in 'poor' category with AQI at 252. 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'.

According to the India Meteorological Department (IMD), the cold wave conditions prevail in northern India, Delhi's Safdarjung and Palam recorded 3.8 and 7.0 degrees Celsius temperature at 8:30 am on Friday.

The cold-wave/severe cold wave conditions will be witnessed in many parts of Punjab Haryana, Chandigarh, Delhi, and Rajasthan till January 3 and over Uttar Pradesh and Madhya Pradesh till January 2, 2022.

According to IMD bulleting, dense fog in isolated pockets in the morning hours is very likely over Uttar Pradesh during the next 5 days and over East and Northeast India during the next 2 days.

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