The air quality in the national capital, Delhi is in the poor category today, with an average Air Quality Index (AQI) of 210 as of 6 this morning. According to the Central Pollution Control Board, some areas of the city have breached the 300 AQI levels. The AQI at Delhi’s R K Puram station was recorded at 311, Bawana at 258, Dwarka-Sector 8 at 250, Mathura Road at 235, IGI Airport at 214, Punjabi Bagh at 208, Chandni Chowk at 180 and Aya Nagar at 144. The India Meteorological Department (IMD) has forecast that Delhi and the surrounding NCR are likely to experience smog and shallow fog during the night and morning hours over the next two days. An AQI between 0 and 50 is considered good, 51 and 100 satisfactory, 101 and 200 moderate, 201 and 300 poor, and 301 and 400 very poor. An AQI between 401 and 450 is considered severe.