The widespread burning of firecrackers in neighbouring states of Delhi is also adding to the pollution woes of the national capital apart from stubble burning, according to a report by a government-run agency.

The air quality in Delhi-NCR on Wednesday oscillated between poor and very poor categories. While the Central Pollution Control Board (CPCB) recorded the overall air quality index (AQI) in the national capital at 281, which falls in poor category, the Centre-run System of Air Quality Forecasting and Research (SAFAR) recorded it at 319, which falls in very poor category.