Air Quality Early Warning System For Delhi

Bulletin & Message

Air Quality and Weather Bulletin for Delhi (26.04.2025)

दिल्लीकेलिएवायुगुणवत्ताऔरमौसमबुलेटिन (26.04.2025)

1. Past Weather and Air Quality Observation: The air quality over Delhi was in Poor category with CPCB AQI 258 at 4 PM on 25.04.2025. There has been fall in minimum temperature upto 01°C and rise in maximum temperature upto 01°C over Delhi/NCR during the past 24 hours. The maximum and minimum temperatures over Delhi are in the range of 42 to 43°C and 19 to 23 °C respectively. The minimum temperature was below normal upto 01 - 03°C and maximum temperature was above normal upto 03 - 05^oCover Delhi/NCR. Predominant surface wind from the west direction with wind speeds less than 16 kmph prevailed during the past 24 hours. Mainly clear sky conditions with wind speed less than 12 kmph from the southwest direction prevailed over the region in the forenoon today.

2. Partly cloudy sky. Occasional sustained surface winds (speed 10-20 kmph). Heat wave conditions very likely at isolated places over Delhi. The maximum temperature over Delhi is likely to be in the range of 41 to 43°C. The maximum temperature will be above normal upto 03 - 05^oC.The predominant surface wind will likely be from the northwest direction with a wind speed of less than 20 kmph till evening. It would decrease becoming less than 14 kmph from the northwest direction during the night on 26.04.2024. Partly cloudy sky. Occasional sustained surface winds (speed 10-20 kmph) gusting upto 30 kmph. The maximum and minimum temperatures over Delhi are likely to be in the range of 40 to 42°C and 23 to 25°C respectively. The minimum temperature will be below normal upto 01 - 03^oC and maximum temperature will be above normal upto 01 - 03^oC.The predominant surface wind will likely be from the southwest direction with a wind speed of 06-10 kmph during morning hours. The wind speed will gradually increase thereafter becoming 12-14 kmph from the southwest direction during the afternoon. It will increase becoming less than 18 kmph from the southeast direction during evening and night on 27.04.2025. Mainly clear sky. Occasional sustained surface winds (speed 10-20 kmph) gusting upto 30 kmph. The maximum and minimum temperatures over Delhi are likely to be in the range of 40 to 42°C and 22 to 24°C respectively. The minimum temperature will be below normal upto 01 - 03^oC and maximum temperature will be above normal upto 01 - 03^oC. The predominant surface wind will likely be from the southeast direction with a wind speed of 14-16 kmph during morning hours. The wind speed will gradually decrease becoming 10-12 kmph from the south direction in the afternoon. It will increase becoming less than 16 kmph from the southeast direction during evening and night on 28.04.2025. Mainly clear sky. Strong surface winds (speed 20 -30 kmph). The maximum and minimum temperatures over Delhi are likely to be in the range of 38 to 40°C and 21 to 23°C respectively. The minimum temperature will be below normal upto 02 - 04^oC and maximum temperature will be near normal. The predominant surface wind will likely be from the southeast direction with a wind speed less than 18 kmph during morning hours. The wind speed will gradually decrease becoming 08-12 kmph from the southeast direction in the afternoon. It will increase becoming less than 18 kmph from the southeast direction during evening and night on 29.04.2025.

3. Predicted maximum mixing depth is likely to be 4900 m on 26.04.2025, 5500 m on 27.04.2025, 4900 m on 28.04.2025 and 4000 m on 29.04.2025over Delhi. Ventilation index is likely to be 16500m2/s from 26.04.2025, 17600 m2/s on 27.04.2025, 8000 m2/s on 28.04.2025 and 9000 m2/s on 29.04.2025 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 the Poor category on 26.04.2025. The air quality is likely to be in the Poor category from 27.04.2025 to 29.04.2025.The outlook for the subsequent 6 Days: The air quality is likely to be in the Poor to Moderate category.

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

Air Quality Bulletin for Ahmedabad (26.04.2025)

1. The overall air quality of Ahmedabad was observed in the Moderate category with AQI 106 on 25.04.2025.

2. The air quality is likely to be in the Moderate category from 26.04.2025 to 28.04.2025.

Air Quality Bulletin for Mumbai (26.04.2025)

1. The overall air quality of Mumbai was observed in the Satisfactory category with AQI 68 on 25.04.2025.

2. The air quality is likely to be in the Satisfactory category from 26.04.2025 to 28.04.2025.

Air Quality Bulletin for Pune (26.04.2025)

1. The overall air quality of Pune was observed in the Moderate category with AQI 104 on 24.04.2025.

2. The air quality is likely to be in the Moderate category from 26.04.2025 to 28.04.2025.

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

❮ ❯

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