SmogRank / World / Thailand / Bangkok / February 2025

Most people breathing unhealthy air in Bangkok, Thailand, February 2025

5 cities in Bangkok, Thailand measured at 2 or more places, ranked by how many people breathed unhealthy air on an average day over the 28 days. The most people breathing unhealthy air: Bangkok, Thailand, about 2.37M on an average day. A city needs measurements on 70% of the days to be ranked.

About 2.68M people in these 5 cities breathed unhealthy air on an average day of February 2025.

Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.

← Bangkok 2.37M 2M0
Every city in Bangkok, Thailand ranked for February 2025 with monitors in two or more places, one column each, ranked by people breathing unhealthy air: height is people on an average day, colour its average. Point at it to read a city; tap to open it.
  1. 1Bangkok
    2.37M
  2. 2Sai Mai
    87.3K
  3. 3Nong Khaem
    85.8K
  4. 4Lak Si
    70.6K
  5. 5Ban Khlong Prawet
    63.1K
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, February 2025 · All cities in Thailand, February 2025 · Bangkok now

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SmogRank, most polluted cities in Bangkok, Thailand, by people breathing unhealthy air, PM2.5, February 2025, smogrank.com/th/region/bangkok/history/2025-02?by=people (accessed 7 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.