India, Nov. 6 -- Delhi's air quality showed further improvement on Wednesday but remained in the "poor" category, with an overall Air Quality Index (AQI) of 202, as favourable wind conditions helped disperse pollutants. The AQI stood at 291 on Tuesday and 309 on Monday, according to data from the Central Pollution Control Board (CPCB).

The levels of PM10 and PM2.5 - the key pollutants - also declined, with PM10 measured at 175.2 micrograms per cubic metre compared with 260 a day earlier, and PM2.5 at 85.5 compared with 128.2 on Tuesday. Of the 38 monitoring stations in the city, 28 reported air quality in the "very poor" category with readings above 300, according to the CPCB's Sameer app.

Vehicular emissions contributed 16.8 per cent, ...