Air Quality Early Warning System For Delhi

Bulletin & Message

Air Quality and Weather Bulletin for Delhi (23.01.2025)

दिल्ली के लिए वायु गुणवत्ता और मौसम बुलेटिन (23.01.2025)

1. Past Weather and Air Quality Observation: The air quality over Delhi was in Poor category with CPCB AQI 260 at 4 PM on 22.01.2025. There has been a rise in minimum temperature upto 02°C over Delhi/NCR during past 24hr. The Maximum and Minimum temperatures over Delhi are in the range of 22 to 26°C and 10 to 11°C respectively. The minimum temperature was above normal upto 04°C and maximum temperature was above normal upto 05°Cover most places. Moderate fog was reported at Safdarjung airport. Safdarjung airport recorded the lowest visibility 200m from 0630 hours to 0830 hours IST which improved thereafter becoming 600 m at 0900 hours IST. Palam airport recorded the lowest visibility 900m from 0800 hours to 0830 hours IST which improved thereafter becoming 1000 m at 0900 hours IST. Mainly smog/mist conditions with predominant surface wind from the northwest direction with wind speed reaching 08 to 10 kmph prevailed during past 24hr. Rainfall observed over Delhi during past 24hr. Mainly smog/mist conditions with wind speed less than 08 kmph southwest direction prevailed over the region in the forenoon today.

2. The predominant surface wind will likely be in the northwest direction with a wind speed of less than 12 kmph till evening. It would decrease thereafter becoming less than 08 kmph from the northwest direction during the night. Smog/shallow fog is likely in the evening/night and partly cloudy sky on 23.01.2024. The predominant surface wind is likely to be from the northwest direction with a wind speed less than 08 kmph during morning hours. Smog/ moderate fog in most of the places very likely to commence during early morning hours with dense fog in isolated places during morning hours. The wind speed will gradually increase thereafter becoming 12-14 kmph from northwest direction during afternoon. It will decrease becoming less than 10 kmph from northwest direction during evening and night. Smog/shallow fog is likely in the evening/night and mainly clear sky on 24.01.2025. The predominant surface wind is likely to be from northwest direction with wind speed less than 08 kmph during morning hours. Smog/ shallow fog in most of the places very likely to commence during early morning hours with moderate fog in few places during morning hours. The wind speed will gradually increase thereafter becoming 12-14 kmph from northwest direction during afternoon. It will decrease becoming less than 08 kmph from northwest direction during evening and night. Smog/shallow fog is likely in the evening/night and mainly clear sky on 25.01.2025. The predominant surface wind will likely be in the northwest direction with a wind speed of less than 06 kmph during morning hours. Smog/ shallow fog in most of the places very likely to commence during early morning hours with moderate fog in few places during morning hours. The wind speed will gradually increase thereafter becoming 10-12 kmph from northwest direction during afternoon. It will decrease becoming less than 08 kmph from northwest direction during evening and night. Smog/shallow fog is likely in the evening/night and mainly clear sky on 26.01.2025.

3. Predicted maximum mixing depth is likely to be 1000 m on 23.01.2025, 1100 m on 24.01.2025, 750 m on 25.01.2025 and 600 m on 26.01.2025 over Delhi. Ventilation index is likely to be 8000 m2/s on 23.01.2025, 8800 m2/s on 24.01.2025, 6000 m2/s on 25.01.2025 and 4500 m2/s on 26.01.2025 over Delhi. The ventilation index lower than 6000 m2/s with average wind speed less than 10 kmph is unfavourable for dispersion of pollutants.

4. The air quality is likely to be in Poor category on 23.01.2025. The air quality is likely to be in Poor category from 24.01.2025 to 26.01.2025. The outlook for subsequent 6 Days: The air quality is likely to be in Poor to Very Poor category.

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

Air Quality Bulletin for Ahmedabad (23.01.2025)

1. The overall air quality of Ahmedabad was observed in Moderate category with AQI 161 on 22.01.2025.

2. The air quality is likely to be in Moderate category from 23.01.2025 to 25.01.2025.

Air Quality Bulletin for Mumbai (23.01.2025)

1. The overall air quality of Mumbai was observed in Moderate category with AQI 154 on 22.01.2025.

2. The air quality is likely to be in Moderate category from 23.01.2025 to 25.01.2025.

Air Quality Bulletin for Pune (23.01.2025)

1. The overall air quality of Pune was observed in Moderate category with AQI 148 on 22.01.2025.

2. The air quality is likely to be in Moderate category from 23.01.2025 to 25.01.2025.

Air Quality Index at Delhi

Current AQI

Forecast

Air Quality Index at Pune

Current AQI

Forecast

Air Quality Index at Mumbai

Current AQI

Forecast

Air Quality Index at Kolkata

Current AQI

Forecast

Air Quality Index at Bengaluru

Current AQI

Forecast

Air Quality Index at Lucknow

Current AQI

Forecast

Air Quality Index at Patna

Current AQI

Forecast

Air Quality Index at Hyderabad

Current AQI

Forecast

Air Quality Index at Ahmedabad

Current AQI

Forecast

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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