• search
For Quick Alerts
For Daily Alerts

Delhi's air oscillates between 'poor', 'very poor'


New Delhi, Nov 23: Delhi's air quality improved a shade and remained in the 'poor' category throughout the day on the back of strong surface winds, but dipped towards the evening.

Delhi's air oscillates between 'poor', 'very poor'

The day's average air quality index (AQI), based on the readings till 4 pm, was 292, classified as 'poor' by the Central Pollution Control Board (CPCB). A poor AQI was last recorded on November 19. However, around 7 pm, the AQI had slipped to the 'very poor' category, which CPCB's air lab chief Dipankar Saha attributed to local emissions, largely from vehicles.

The dominant pollutants captured by 17 CPCB monitors across the city were PM2.5 and NO2, largely products of vehicular emissions. "Pollution levels were high during the morning hours due to cloudy conditions which increases moisture in the air and traps pollutants.

"But as the day progressed, wind speed picked up and temperature also rose, which helped in dispersion of particulate matter," Saha said. The AQI scale ranges from 0-500. The advisory that comes with 'poor' category air says it may trigger breathing discomfort to most people on prolonged exposure.

According to the System of Air Quality Forecasting and Research (SAFAR), the 24-hour average (rolling) levels of ultrafine particulates PM2.5 and PM10 were 137 and 229 micrograms per cubic metre at 7 pm, as against the prescribed limits 60 and 100.


For Daily Alerts
Get Instant News Updates
Notification Settings X
Time Settings
Clear Notification X
Do you want to clear all the notifications from your inbox?
Settings X
We use cookies to ensure that we give you the best experience on our website. This includes cookies from third party social media websites and ad networks. Such third party cookies may track your use on Oneindia sites for better rendering. Our partners use cookies to ensure we show you advertising that is relevant to you. If you continue without changing your settings, we'll assume that you are happy to receive all cookies on Oneindia website. However, you can change your cookie settings at any time. Learn more