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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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Bulletin & Message

 Air Quality and Weather Bulletin for Delhi NCR (25.10.2021) 

  1. The air quality over Delhi-NCT is likely to remain in Satisfactory category on 25.10.2021. The good rainfall on Sunday favourably impacted air quality. The air quality is likely to deteriorate gradually and remain in Satisfactory to Moderate category on 26.10.2021 and Moderate category on 27.10.2021. The Outlook for subsequent 5 Days: The air quality is likely to remain in Poor category.
  2.   The predominant surface wind is likely to be coming from variable directions of Delhi with wind speed of 04-06 kmph and mainly clear sky on 25.10.2021. The predominant surface wind is likely to be coming from Northwest/North directions of Delhi with wind speed of 04-08 kmph, mainly clear sky and mist in the morning on 26.10.2021. The predominant surface wind is likely to be coming from Northwest/North directions of Delhi with wind speed of 06-08 kmph, mainly clear sky and mist in the morning on 27.10.2021.
  3. Predicted maximum mixing depth is likely to remain from 1700 m on 25.10.2021, 2100 m on 26.10.2021 and 1950 m on 27.10.2021 over Delhi. Ventilation index is likely to be 13500 m2/s on 25.10.2021, 1000 m2/s on 26.10.2021 and 14000 m2/s on 27.10.2021. The ventilation index lower than 6000 m2/s with average wind speed less than 10 kmph is unfavourable for dispersion of pollutants. 
  4. The Crop residue burning fire points were observed in Punjab and Haryana on 24.10.2021. The contribution of biomass burning in PM2.5 concentration is likely to be negligible on 25.10.2021 as winds are not favourable to transport pollutants.
  5.  Detailed forecast analysis and verification can be seen at https://ews.tropmet.res.in.

Total Visitors : 76402
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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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