Mumbai AQI Today, 21 October 2025: AQI plummets to ‘very poor’ category in Colaba, other parts of Mumbai day after Diwali

Mumbai AQI Level Today, 21 October 2025: Check the latest air quality index, pollution level, and smog conditions across Mumbai and NCR with health safety advice and AQI category updates.

The air quality index (AQI) in Mumbai plummeted severely, with the Air Quality Early Warning System showing a reading of 217 early morning.(Express Photo by Amit Chakravarty)

Mumbai Air Quality Index (AQI) Level Today, October 21: A day after Diwali, several parts of Mumbai recorded air quality index (AQI) in the ‘very poor’ category on Tuesday, with the Air Quality Early Warning System showing the highest reading of 341 at India Meteorological Department’s (IMD) Colaba station, as of 5 am.

Owing to bursting of firecrackers and slowing down of wind patterns as winter nears, the air quality index (AQI) in Mumbai plummeted severely, with the Air Quality Early Warning System for Mumbai showing a reading of 217 early morning, marking a massive spike from 187 recorded on Monday.

This is the worst recorded AQI since the monsoon withdrawal on October 10. Usually, Mumbai records a rise in the overall AQI following Diwali every year.

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Followed by IMD Colaba, the highest AQI was recorded in Nandadeep Garden-Bandra Traffic Junction (313), Bapista Garden Mazagaon (305), Chembur-TISS (292), Aarakshan Maidan Andheri (276), Fire Station Malad West (276), Bhayandar West (272), BMC Shastri Garden (270), CBD Belapur (258), Nerul Navi Mumbai (256), and Kherwadi Bandra East (237).

The AQI was recorded to be in the ‘poor’ category in Byculla (262), Nerul Navi Mumbai (256), Bandra Kurla Complex (242), Powai (239), Kandivali West (229), Chembur (208), Mindspace Malad West (204), and Kalamboli Navi Mumbai (201).

Other areas across Mumbai recorded ‘moderate’ air quality index early morning. Among the ‘moderately’ polluted zones were Tondare-Taloja (196), Sewri (195), Borivali East (189), Sion (184), Vile Parle West (164), Kandivali East (155), Colaba (149), Shivaji Nagar (137), Worli (123), and Kurla (119), Vasai West (110).

The AQI reading is categorised as Good (0-50), Satisfactory (51-100), Moderately Polluted (101-200), Poor (201-300), Very Poor (301-400), and Severe (401-500). Higher the AQI reading, the unhealthier it is to breathe.

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Mumbai weather today

Haze enveloped Mumbai skies in the morning hours of Tuesday, which will eventually transition to clear skies in the afternoon in the city and the suburbs, a forecast by the India Meterological Department (IMD) stated.

The maximum and minimum temperatures are likely to be around 36 and 26 degrees Celsius, respectively.

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