SmogRank / World / India / January 2025

Most polluted cities in India, January 2025

5 cities in India ranked by their average PM2.5 over the 31 days. Worst: Kolkata at 173.4 µg/m³, #3 of 2,121 cities in the world. Cleanest: Chennai at 61.6. A city needs measurements on 70% of the days to be ranked.

← Kolkata 173.4 µg/m³ 150 µg/m³0
Every city in India ranked for January 2025, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1KolkataWest Bengal
    10
  2. 2DelhiDelhi
    10
  3. 3MumbaiMaharashtra
    10
  4. 4HyderabadTelangana
    10
  5. 5ChennaiTamil Nadu
    8
Low1–3
Moderate4–6
High7–9
Very high10

The UK's Daily Air Quality Index (1 to 10), PM2.5 bands. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, January 2025 · India now

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SmogRank, most polluted cities in India, PM2.5, January 2025, smogrank.com/in/history/2025-01 (accessed 2 Oct 2026).

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