Updated On: 09 December, 2025 05:11 PM IST | Asif Ali Sayed
On a cold Tuesday morning, Mumbai`s familiar skyline appeared blurred, as a blanket of smog coated parts of city. Pics/Shadab Khan

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The overall Air Quality Index (AQI) across Mumbai slipped into the `moderate` category
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The smog is being attributed to a mix of factors: rising particulate matter from traffic, ongoing construction dust, and emissions from industrial sources, experts suggest

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Experts note that primary pollutants like nitrogen oxides (from vehicle exhausts and factories), and particulate matter (PM2.5 and PM10) remain high — even though the AQI has not yet crossed into `poor` or `unhealthy` territory
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According to the Sameer app, Mumbai’s overall Air Quality Index (AQI) stands at 127

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Deonar, with an AQI of 145, and Vile Parle, at 139, recorded the highest AQI levels among the affected areas in Mumbai
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