SmogRank / World / India / Karnataka / October 2025

Most polluted cities in Karnataka, India, October 2025

7 cities in Karnataka, India ranked by their average PM2.5 over the 31 days. Worst: Bengaluru at 22.3 µg/m³, #247 of 2,564 cities in the world. Cleanest: Shivamogga at 18.2. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Madikeri 19% 15%0
Every city in Karnataka, India ranked for October 2025, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Madikeri
    19%
  2. 2Bengaluru
    7%
  3. 3Vijayapura
    3%
  4. 4Kalaburagi
    3%
  5. 5Hubballi
    0%
  6. 6Bagalkot
    0%
  7. 7Shivamogga
    0%
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

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SmogRank, most polluted cities in Karnataka, India, PM2.5, October 2025, smogrank.com/in/region/karnataka/history/2025-10 (accessed 7 Oct 2026).

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