The national capital's air quality turned 'very poor', a day after recording 'severe' pollution, as wind speed picked up early morning and dispersed pollutants, authorities said.
"Early morning winds picked up, which came as respite and dispersed particles rapidly and pulled back air quality towards very poor range," the official said.
On Tuesday, the city recorded the worst air quality of the season after pollution level turned severe at 401, prompting authorities to ban construction activities along with halting operations of industries using coal and biomass as fuel between November 1 and 10.
An AQI between 0 and 50 is considered 'good', 51 and 100 'satisfactory', 101 and 200 'moderate', 201 and 300 'poor', 301 and 400 'very poor', and 401 and 500 'severe'.
On Wednesday, the PM2.5 was recorded at 215. Fine particulates can be a matter of more serious health concern than PM10.
On Wednesday, regional factors like stubble burning contributed to 22 per cent of PM2.5 pollution in the national capital, according to SAFAR.
A thick pall of haze continued to engulf the national capital, and according to authorities would continue to hover over the city for the next three days.
(With inputs from agencies.)