Delhi: Air Quality remain in 'severe category', dense smog envelops air
However, several places in Delhi are still in the 'severe' category for air pollution, with Ashok Vihar 316, Anand Vihar 311, ITO 316, Wazirpur 331, Vivek Vihar 318 and Shadipur 375. An AQI between 0-50 is considered good, 51-100 is satisfactory, 101-200 is moderate, 201-300 is poor, 301-400 is very poor and 401-500 is severe.