AQI

— By Dr KK Aggarwal and Dr Anil Kumar (Heart Care Foundation of India) More than 60% reduction in air...

The number of COVID-19 positive cases in India has risen to 649 (including 593 active cases, 42 cured/ discharged people and 13 deaths), said the Ministry of Health and Family Welfare on Thursday.

An AQI between 0-50 is considered good, 51-100 is satisfactory, 101-200 moderate, 201-300 poor, 301-400 very poor and 401-500 is marked as severe/hazardous.

The AQI in the area around Delhi University was recorded 392 today which falls under the 'very poor' category. Similarly, Chandni Chowk, Pusa Road, and Lodhi Road had an AQI of 326, 304 and 334, respectively.

An AQI between 0-50 is considered good, 51-100 is satisfactory, 101-200 moderate, 201-300 poor, 301-400 very poor and 401-500 is marked as severe/hazardous.

An AQI between 0-50 is considered good, 51-100 is satisfactory, 101-200 moderate, 201-300 poor, 301-400 very poor and 401-500 is marked as severe/hazardous.

The India Meteorological Department (IMD) has forecast a generally cloudy sky with light rain for today in the city with maximum and minimum temperature at 20 degrees and 13 degrees Celsius, respectively.

The air quality in the national capital on Thursday morning plunged to "severe levels" for the second consecutive day, said System of Air Quality and Weather Forecasting and Research (SAFAR).

According to SAFAR, the rise in air pollution is because of the prevalence of calm surface winds and decrease in ventilation coefficient which creates a conducive environment for pollutant accumulation.

The PM 10 levels were slightly better at Lodhi Road, docking in at 135 which falls in the 'moderate' category while the PM 2.5 remained 'poor' at 235.