Delhi's air quality plummeted to 'very poor' Thursday morning, with Anand Vihar, Bawana, and other areas recording alarming AQI levels exceeding 300. Residents complained of eye irritation and breathing difficulties.

Delhi was listed as India's most polluted city Thursday as a weeks-long air quality crisis gripping northern India has shown few signs of letting up.

Pollution levels in Delhi increased slightly on Thursday morning with the air quality in the 'very poor' category, officials said. At 9 am, Delhi's Air Quality Index (AQI) was recorded at 313, compared to a reading of 301 at 9 am on Wednesday,