SmogRank / World / Thailand / April 2023

Most polluted cities in Thailand, April 2023

10 cities in Thailand ranked by their average PM2.5 over the 30 days. Worst: Nong Khaem at 39.6 µg/m³, #19 of 1,360 cities in the world. Cleanest: Bang Bo District at 29.6. A city needs measurements on 70% of the days to be ranked.

OpenAQ's archive, where our readings come from, has almost none for 3 of these 30 days. Cities in the United States and Europe have them from the EPA's and the European Environment Agency's own records of the same monitors; elsewhere a city's average is over its other days. Why.

← Nong Khaem 39.6 µg/m³ 30 µg/m³0
Every city in Thailand ranked for April 2023, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1Nong KhaemBangkok
    111
  2. 2Samut PrakanSamut Prakan
    106
  3. 3Nakhon PathomNakhon Pathom
    104
  4. 4BangkokBangkok
    104
  5. 5Khlong LuangPathum Thani
    99
  6. 6Bang KapiBangkok
    98
  7. 7Mueang NonthaburiNonthaburi
    97
  8. 8Samut SakhonSamut Sakhon
    95
  9. 9Phra PradaengSamut Prakan
    93
  10. 10Bang Bo DistrictSamut Prakan
    89
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, April 2023 · Thailand now

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SmogRank, most polluted cities in Thailand, PM2.5, April 2023, smogrank.com/th/history/2023-04 (accessed 2 Oct 2026).

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