India, Oct. 28 -- Delhi's air quality remains 'poor'; minimum temperature recorded at 15.7degC

Delhi's air quality index (AQI) remained in the 'poor' category as the city recorded a minimum temperature of 15.7degC on Wednesday, 0.4 degrees below normal.

The development comes a day after the national Capital recorded its coldest day of the month, clocking a minimum temperature of 15.3degC.

Delhi's AQI was recorded at 230 at 8am. Two monitoring stations, Jahangirpuri and Vivek Vihar, recorded 'very poor' air quality with readings of 307 and 320 respectively. Sixteen stations were in the moderate category.

The 24-hour AQI at 4pm on Tuesday was 197 but by evening it plummeted to poor.

Particulate matter 2.5 (PM2.5) was the predominant po...