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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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Near Realtime Observation At Delhi
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Air Quality Forecast
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 Air Quality and Weather Bulletin for Delhi NCR (23.10.2020)

  1. As per AQ-EWS models the air quality over Delhi NCR is likely to remain in Very Poor category on 23.10.2020. The air quality is likely to remain in Very Poor category on  24.10.2020 and 25.10.2020. The light winds and stagnant meteorological conditions with mist in the morning will persist till 26.10.2020.
  2. The predominant surface wind is likely to be coming from Northwest direction of Delhi with wind speed 6-10 kmph during the daytime, mainly clear sky and haze on 23.10.2020. The predominant surface wind is likely to be coming from East-Northeast direction in the morning and Northwest direction during daytime with wind speed 5-10 kmph, mainly clear sky and mist in the morning on 24.10.2020. The predominant surface wind is likely to be coming from Northeast direction in morning/evening and from Northwest direction of  during daytime with wind speed 6-12 kmph, mainly clear sky and mist in the morning on 25.10.2020.
  3. Predicted maximum mixing depth is likely to be 2800 m on 23.10.2020, 2700 m on 24.10.2020 and 3200 m on 25.10.2020 over Delhi. Ventilation index is likely to be approx. 10000 m2/s on 23.10.2020, 11000 m2/s on 24.10.2020 and 14000 m2/s on 25.10.2020. The ventilation index lower than 6000 m2/s with average wind speed less than 10 kmph is unfavourable for dispersion of pollutants.
  4.  Large increase in number of fire points were observed over Punjab, Haryana and UP which are likely impact of air quality of Delhi NCR.
  5. 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.

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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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