Air Quality Index: Levels of AQI in Delhi NCR region
An AQI between 100 and 200 comes under moderate category, 201 and 300 under poor, 301 and 400 very poor, and that between 401 and 500 is severe. In the National Capital Region, Ghaziabad, Faridabad, Gurugram, and Noida recorded very poor air quality, said CPCB.
The overall PM2.5 level (fine particulate matter in the air with a diameter of less than 2.5 micrometers) in Delhi was recorded at 197 while the PM10 (diameter less than 10 micrometers) level was at 312, the CPCB said.
The Center-run System of Air Quality and Weather Forecasting (SAFAR) said the overall air quality over Delhi is very poor.
AQI expected to remain 'very poor' for next three days
"Moderate foggy conditions will prevail for the next two days over Delhi and surrounding regions and may not allow significant improvement. An active western disturbance is very likely to cause fairly widespread moisture intrusion over the northern region including Delhi," the SAFAR said.
"The AQI is expected to remain in very poor range for the next three days with declining magnitude," it had said.