Air Quality Bulletin for Delhi NCR (19.01.2020)

1. As per AQ-EWS models the air quality is likely remain in poor to lower end of very poor category on 19.01.2020. The air quality is likely to remain in poor to lower end of very poor category on 20.01.2020. The air quality is likely to remain in lower end of very poor category on 21.01.2020.
2. The predominant surface wind is coming from West-Southwest direction of Delhi having wind speed upto 14 kmph on 19.01.2020 with mainly clear sky and mist/haze. The predominant surface wind is likely to be coming from West-Northwest direction of Delhi having wind speed upto 12 kmph on 20.01.2020 with partly cloudy sky and moderate fog in the morning. The predominant surface wind is likely to be coming from Southeast direction of Delhi having wind speed upto 12 kmph on 21.01.2020 with partly cloudy sky, moderate to dense fog in the morning and possibility of drizzle.
3. Predicted maximum mixing depth is likely to remain 1100 m on 19.01.2020, 1000 m on 20.01.2020 and 750 m on 21.01.2020 over Delhi. Ventilation index is likely to be 3000 m²/s on 19.01.2020, 2000 m²/s on 20.01.2020 and 1000 m²/s 21.01.2020. The ventilation index lower than 6000 m²/s with average wind speed less than 10 kmph is unfavourable for dispersion of pollutants.
4.  No significant dust transport from neighbouring states in Delhi is expected.
5.  Location specific AQ forecast can be seen at safar.tropmet.res.in. Detailed forecast analysis and verification can be seen at https://ews.tropmet.res.in.