SmogRank / World / India / Assam / March 2025

Most polluted cities in Assam, India, March 2025

3 cities in Assam, India ranked by their average PM2.5 over the 31 days. Worst: Kahi Kuchi at 91.4 µg/m³, #7 of 2,809 cities in the world. Cleanest: Nagaon at 48.7. 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.

← Guwahati 97% 90%0
Every city in Assam, India ranked for March 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. 1Guwahati
    97%
  2. 2Kahi Kuchi
    93%
  3. 3Nagaon
    69%
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

All cities in the world, March 2025 · All cities in India, March 2025 · Assam now

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SmogRank, most polluted cities in Assam, India, PM2.5, March 2025, smogrank.com/in/region/assam/history/2025-03 (accessed 6 Oct 2026).

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