Delhi woke up on Friday to worsened air quality with the AQI touching 301 which falls in the `very poor` category. A sudden spike in dust pollution is causing the Delhi`s air quality to deteriorate, reported news agency PTI.

According to the Central Pollution Control Board, Delhi`s overall AQI was recorded at 301 at 7 am today. An AQI ranging from 301 to 400 is categorised as `very poor`. The AQI recorded in most of the observation stations was in the very poor category, reported PTI.