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1. The air quality over Delhi-NCT is likely to remain in Moderate to Poor category on 28.05.2022. The air quality is likely to remain in Poor category on 29.05.2022 and 30.05.2022. The Outlook for subsequent 7 Days: The air quality is likely to remain in Poor category.
2. Long range transported dust will also impact air quality over parts of Rajasthan, Gujarat, and NCR during next two days.
3. The predominant surface wind is likely to be coming from West direction of Delhi with wind speed 16-22 kmph, and partly cloudy sky with possibility of thundery development on 28.05.2022. The predominant surface wind is likely to be coming from West/Southwest direction of Delhi with wind speed 16-22 kmph, and partly cloudy sky on 29.05.2022. The predominant surface wind is likely to be coming from Southwest/West direction of Delhi with wind speed 04-16 kmph, and partly cloudy sky with possibility of thundery development on 30.05.2022.
4. Predicted maximum mixing depth is likely to be 4800 m on 28.05.2022, 5200 m on 29.05.2022 and 5500 m on 30.05.2022 over Delhi. Ventilation index is likely to be above 30000m2/s from 28.05.2022 to 30.05.2022 over Delhi. The ventilation index lower than 6000 m2/s with average wind speed less than 10 kmph is unfavourable for dispersion of pollutants.
5. Detailed forecast analysis and verification can be seen at https://ews.tropmet.res.in.
Air Quality Index Range
AQI: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.
AQI: Satisfactory (51 - 100)
Air quality is considered satisfactory, and air pollution poses little or no risk.
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.
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.
AQI: Very Poor (301 - 400)
Health alert: everyone may experience more serious health effects.
AQI: Severe (401 - 500)
Health warnings of emergency conditions. The entire population is more likely to be affected.
Visibility Range
VISIBILITY: Below 50 M
VISIBILITY: FROM 50M TO 174M
VISIBILITY: FROM 175M TO 299M
VISIBILITY: FROM 300M TO 549M
VISIBILITY: 500M AND ABOVE
AQI: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.
AQI: Satisfactory (51 - 100)
Air quality is considered satisfactory, and air pollution poses little or no risk.
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.
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.
AQI: Very Poor (301 - 400)
Health alert: everyone may experience more serious health effects.
AQI: Severe (401 - 500)
Health warnings of emergency conditions. The entire population is more likely to be affected.