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AIR QUALITY EARLY WARNING SYSTEM FOR DELHI
MINISTRY OF EARTH SCIENCES, GOVT. OF INDIA
पृथ्वी विज्ञान मंत्रालय, भारत सरकार
(Project By : Indian Institute of Tropical Meteorology, Pune)

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  Air Quality and Weather Bulletin for Delhi NCR (30.11.2021) 

1.  The air quality over Delhi-NCT is likely improve further today and reach in lower end of Very Poor to Poor category on 30.11.2021. Winds are likely to be strong on 30th November but becoming slow/calm on 1st December. The air quality is likely to deteriorate but remain in Very Poor category on 01.12.2021 and 02.12.2021. The Outlook for subsequent 5 Days: The air quality is likely to remain in Very Poor category. PM2.5 to be the predominant pollutant. 

2.  The predominant surface wind is likely to be coming from Northwest direction of Delhi with wind speed 08-12 kmph, mainly clear sky on 30.11.2021. The predominant surface wind is likely to be calm during morning hours, coming from North-Northwest directions of Delhi with wind speed upto 04 kmph, mainly clear sky and shallow fog in the morning on 01.12.2021. The predominant surface wind is likely to be calm during morning hours, coming from South-Southwest directions of Delhi with wind speed upto 04 kmph, partly cloudy sky and shallow fog in the morning on 02.12.2021. 

3.   Predicted maximum mixing depth is likely to remain 1100 m on 30.11.2021, 800 m on 01.12.2021 and 1000 m on 02.12.2021over Delhi. Ventilation index is likely to be 7000 m2/s on 30.11.2021, 2500 m2/s 01.12.2021 and 3000 m2/s on 02.12.2021. The ventilation index lower than 6000 m2/s with average wind speed less than 10 kmph is unfavourable for dispersion of pollutants. 

4.   Detailed forecast analysis and verification can be seen at https://ews.tropmet.res.in.

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Current AQI
Forecast
Mid Visibility IGIA
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Air Quality Index Range

Good

AQI: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.

Satisfactory

AQI: Satisfactory (51 - 100)
Air quality is considered satisfactory, and air pollution poses little or no risk.

Moderate

AQI: Moderate (101 - 200)
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Poor

AQI: Poor for Sensitive Groups (201 - 300)
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.

Very Poor

AQI: Very Poor (301 - 400)
Health alert: everyone may experience more serious health effects.

Severe

AQI: Severe (401 - 500)
Health warnings of emergency conditions. The entire population is more likely to be affected.

X

Visibility Range

CAT - IIIC

VISIBILITY: Below 50 M

CAT - IIIB

VISIBILITY: FROM 50M TO 174M

CAT - IIIA

VISIBILITY: FROM 175M TO 299M

CAT - II

VISIBILITY: FROM 300M TO 549M

CAT -I

VISIBILITY: 500M AND ABOVE

Air Quality Forecast Over India

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