SmogRank / World / Thailand / Bangkok / February 2026
Most polluted cities in Bangkok, Thailand, February 2026
14 cities in Bangkok, Thailand ranked by their average PM2.5 over the 28 days. Worst: Khlong Sam Wa at 37.0 µg/m³, #175 of 2,841 cities in the world. Cleanest: Ban Khlong Prawet at 28.0. 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.
- 1Khlong Sam Wa 46%
- 2Khan Na Yao 43%
- 3Bang Na 39%
- 4Lat Krabang 36%
- 5Nong Khaem 36%
- 6Bueng Kum 32%
- 7Bangkok 29%
- 8Saphan Sung 26%
- 9Sai Mai 25%
- 10Lak Si 25%
- 11Bang Kapi 25%
- 12Ban Samae Dam 21%
- 13Nong Chok 19%
- 14Ban Khlong Prawet 18%
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 Bangkok, Thailand, PM2.5, February 2026, smogrank.com/th/region/bangkok/history/2026-02 (accessed 6 Oct 2026).
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