The Central Pollution Control Board (CPCB) reported that Delhi's overall Air Quality Index (AQI) settled at 378 on Tuesday, indicating that the city's air quality was still severe and just below the "severe" threshold. Several parts of the national capital continued to record pollution levels close to the 400 mark.

CPCB data showed the capital’s average AQI has consistently remained in the ‘very poor’ to ‘severe’ range over the past week. the average AQI stood at 391 on Sunday, 370 on Saturday, 374 on Friday, 391 on Thursday, 392 on Wednesday, 374 on Tuesday and 351 on Monday.

The CPCB’s Sameer app, which compiles real-time readings from all monitoring stations across Delhi, indicated that 15 out of 38 operational stations fell into the ‘severe’ category on Monday.

Key locations such as ITO, Punjabi Bagh, Patparganj, Ashok Vihar, Sonia Vihar, Rohini, Vivek Vihar, Narela, Bawana, and others reported AQI levels exceeding 400.

As per CPCB standards, an AQI between 0–50 is 'good', 51–100 'satisfactory', 101–200 'moderate', 201–300 'poor', 301–400 'very poor' and 401–500 'severe'.

The Decision Support System (DSS) of the Indian Institute of Tropical Meteorology (IITM), Pune, estimated that vehicular emissions contributed 21.6 per cent to Delhi’s pollution on Monday, making it the highest pollutant source, while stubble burning accounted for 1.8 per cent.

For Tuesday, the DSS projected contributions of 21 per cent and 1.6 per cent, respectively.

Meanwhile, the minimum temperature was recorded at 9.3 degrees Celsius, two degrees below normal, while the maximum settled at 26.1 degrees Celsius, 0.6 degrees above normal, according to the India Meteorological Department (IMD).

For Tuesday, the IMD has forecast moderate fog, with maximum and minimum temperatures expected to hover around 24 degrees Celsius and 9 degrees Celsius, respectively.