SAFAR in its bulletin said that an increase in temperature and boundary layer height has helped in pushing the national capital's overall air quality from the 'very poor' to 'poor' category.
According to the System of Air Quality and Weather Forecasting and Research (SAFAR), PM10 pollutants were recorded at 245 and PM2.5 pollutants were recorded at 131.
Delhi woke up to "dense to very dense fog" on Saturday with the minimum temperature settling at 10.4 degrees Celsius, as per the Meteorological department.
The Central Pollution Control Board (CPCB) reported AQIs of 392 in ITO, 412 in RK Puram and 406 in Chandni Chowk, all in the 'very poor' category.
The IMD also predicted similar conditions over other parts of the country, including "Dense to very dense (fog) at isolated places over Punjab and Haryana.
The air quality of the national capital improved to the 'moderate' category on Sunday as the overall Air Quality Index (AQI) stood at 159.
Visibility was reported at 25 meters due to dense fog in Bareilly, Lucknow, and Gorakhpur on Tuesday. Visibility of 50 meters was reported at Ganganagar, Patiala, Baharaich, and Purnea, IMD said.
India Meteorological Department (IMD) in a tweet stated, "Visibility (in meter) recorded 0530 hours IST of January 31: Delhi (Palam and Safdarjung)-1000m."
Delhi on Thursday remained enveloped in a layer of fog with visibility as low as 0 meter at some isolated pockets of the national capital.
"The minimum temperature in Delhi dipped down to 3 degree Celsius and the maximum temperature is expected to touch 21 degree Celsius," the Regional Meteorological Department of Delhi stated in its daily report.
A fresh Western Disturbance will start affecting the Western Himalayan region Friday onwards. As a result, the mercury is likely to drop to 4 degrees Celsius by Monday, an IMD official said.
At least 16 Delhi-bound trains have been reported to be running late. The Delhi Airport, however, said that all flight operations are normal and low visibility procedures are in process.
In a tweet, the India Meteorological Department (IMD) said, "Dense to very dense fog observed over Punjab, West Uttar Pradesh and moderate to dense fog over Haryana, Chandigarh, Delhi, East Uttar Pradesh, Bihar and Assam and Meghalaya on 17.01.2021."
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.
The weather department on Tuesday had issued an orange alert for the northern plains, which are also forecast to witness foggy conditions. A large part of the country is set to face intense cold conditions over the next few days, it said.
Mumbai on Friday once again recorded an Air Quality Index (AQI) of 317 which was worse than that of Delhi, an official of the India Meteorological Department said.
Following the ongoing COVID-19 conditions, health experts have urged people to take extra precautions as respiratory diseases tend to worsen with a dip in temperature and a rise in pollution levels.
A thick layer of fog engulfed parts of the national capital on Sunday including Rajghat and Punjabi Bagh. According to the India Meteorological Department (IMD), cold wave to severe cold wave conditions are likely to re-establish over Punjab, Haryana, Chandigarh and Delhi, Rajasthan and West Uttar Pradesh from 29th December.
The mercury is likely to increase slightly on Sunday and Monday under the influence of a fresh western disturbance affecting the upper reaches of the Himalayas.
At Mathura Road in Delhi, AQI is in the severe category with PM 10 of 509 and PM 2.5 of 456. Lodhi Road is better in the very poor category with PM 10 of 375 and PM 2.5 of 395.
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