SmogRank / World / India / Assam / 2025

Most polluted cities in Assam, India, 2025

2 cities in Assam, India ranked by their average PM2.5 over the 365 days; 2 above the WHO annual guideline (5.0 µg/m³). Worst: Kahi Kuchi at 48.5 µg/m³, #37 of 2,624 cities in the world. Cleanest: Guwahati at 34.8. 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.

  1. 1Kahi Kuchi
    64%
  2. 2Guwahati
    35%
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 Assam, India, PM2.5, 2025, smogrank.com/in/region/assam/history/2025 (accessed 6 Oct 2026).

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