Air Quality Early Warning System For Delhi

Bulletin & Message

Air Quality and Weather Bulletin for Delhi (23.03.2025)

दिल्ली के लिए वायु गुणवत्ता और मौसम

बुलेटिन (23.03.2025)

Past Weather and Air Quality Observation: The air quality over Delhi was in Moderate category with CPCB AQI 161 at 4 PM on 22.03.2025. There has been a fall in minimum and maximum temperatures upto 01°C over Delhi/NCR during the past 24 hours. The maximum and minimum temperatures over Delhi are in the range of 31 to 33°C and 14 to 17°C respectively. The minimum temperature was below normal upto 03°C and maximum temperature near normal at most places. Mainly clear sky conditions with predominant surface wind from the northwest direction with wind speeds less than 18 to 20 kmph prevailed during the past 24 hours. Mainly clear sky conditions with wind speed less than 08 kmph from the southwest direction prevailed over the region in the forenoon today.
Mainly clear sky. The maximum temperature over Delhi is likely to be in the range of 32 to 34°C. The predominant surface wind will likely be from the northwest direction with a wind speed of less than 08 kmph till evening. It would decrease thereafter becoming less than 06 kmph from the east direction during the night on 23.03.2024. Mainly clear sky. The maximum and minimum temperatures over Delhi are likely to be in the range of 33 to 35°C and 16 to 18°C respectively. The predominant surface wind will likely be from the northwest direction with a wind speed of 04-06 kmph during morning hours. The wind speed will gradually increase thereafter becoming 06-08 kmph from the northeast direction during the afternoon. It will decrease becoming less than 06 kmph from the northeast direction during evening and night on 24.03.2025. Mainly clear sky. The maximum and minimum temperatures over Delhi are likely to be in the range of 35 to 37°C and 16 to 18°C respectively. The predominant surface wind will likely be from the northwest direction with a wind speed of 04-06 kmph during morning hours. The wind speed will gradually increase becoming 10-12 kmph from the northwest direction in the afternoon. It will decrease becoming less than 08 kmph from the east direction during evening and night on 25.03.2025. Mainly clear sky. The maximum and minimum temperatures over Delhi are likely to be in the range of 36 to 38°C and 17 to 19°C respectively. The predominant surface wind will likely be from the west direction with a wind speed of 06-08 kmph during morning hours. The wind speed will gradually increase becoming 12-14 kmph from the northwest direction in the afternoon. It will decrease becoming less than 10 kmph from the northwest direction during evening and night on 26.03.2025.
Predicted maximum mixing depth is likely to be 2500 m on 23.03.2025, 3000 m on 24.03.2025, 3750 m on 25.03.2025 and 4250 m on 26.03.2025 over Delhi. Ventilation index is likely to be 4000 m²/s on 23.03.2025, 14000 m²/s on 24.03.2025, 20000 m²/s on 25.03.2025 and 28500 m²/s on 26.03.2025 over Delhi. The ventilation index lower than 6000 m²/s with average wind speed less than 10 kmph is unfavourable for dispersion of pollutants.
The air quality is likely to be in the Moderate category on 23.03.2025. The air quality is likely to be in the Moderate category from 24.03.2025 to 26.03.2025. The outlook for the subsequent 6 Days: The air quality is likely to be in the Moderate to Poor category.
Detailed forecast analysis and verification can be seen at https://ews.tropmet.res.in.

Air Quality Bulletin for Ahmedabad (23.03.2025)

1. The overall air quality of Ahmedabad was observed in the Moderate category with AQI 137 on 22.03.2025.

2. The air quality is likely to be in the Moderate category from 23.03.2025 to 25.03.2025.

Air Quality Bulletin for Mumbai (23.03.2025)

1. The overall air quality of Mumbai was observed in the Satisfactory category with AQI 74 on 22.03.2025.

2. The air quality is likely to be in the Satisfactory category from 23.03.2025 to 25.03.2025.

Air Quality Bulletin for Pune (23.03.2025)

1. The overall air quality of Pune was observed in the Moderate category with AQI 145 on 22.03.2025.

2. The air quality is likely to be in the Moderate category from 23.03.2025 to 25.03.2025.

Air Quality Index at Delhi

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Air Quality Index at Pune

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Air Quality Index at Mumbai

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Air Quality Index at Kolkata

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Air Quality Index at Bengaluru

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Air Quality Index at Lucknow

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Air Quality Index at Patna

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Air Quality Index at Hyderabad

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Air Quality Index at Ahmedabad

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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