Heavy rain and hailstorm bring Delhi's air quality to 'moderate'

The overall Air Quality Index in Delhi has improved to 'moderate' category after heavy rains and hailstorm on Thursday washed away pollutants in the air, the authorities said. The overall Air Quality Index (AQI) of the city was at 142 on Friday, which falls in the 'moderate' category. On Wednesday, Delhi's air quality was in 'very poor' category at 349.