An AQI between 0-50 is marked good, 51-100 is satisfactory, 101- 200 is moderate, 201- 300 is poor, 301-400 is very poor and 401-500 is considered severe.
The cities/towns where air quality is 'moderate' or below, only green crackers be sold, and the timings for use and bursting of crackers be restricted to two hours during festivals.
