Delhi's air quality Wednesday deteriorated to very poor category due to decreased wind speed that slowed dispersion of pollutants, authorities said.
According to the Central Pollution Control Board (CPCB) data, the overall air quality index (AQI) in the city was 379, which falls in the 'very poor' category.
An AQI between 100 and 200 comes under the 'moderate' category, 201 and 300 is considered 'poor', 301 and 400 'very poor', while that between 401 and 500 'severe'.
The city's air quality was severe till Sunday but with improved wind speed of 20 km/hr, the air quality significantly improved and was recorded in 'poor' category, authorities said.
But on Wednesday, the air quality again deteriorated as the wind speed dropped.
As many as 14 areas recorded 'severe' air quality and 17 very poor air quality, the CPCB said.
In the National Capital Region (NCR), Ghaziabad recorded severe air quality while Faridabad, Noida, Gurgaon and Greater Noida recorded ' very poor' air quality, it ...
