SmogRank / Countries / Thailand / June 2025

Most polluted cities in Thailand, June 2025

5 cities in Thailand ranked by their average PM2.5 over the 30 days. Worst: Chiang Mai at 9.9 µg/m³, #926 of 1,912 cities in the world. Cleanest: Bang Pakong at 6.8. A city needs measurements on 70% of the days to be ranked.

  1. 1Chiang Mailow-cost sensorsChiang Mai
    9.9
  2. 2Sai Mailow-cost sensorsBangkok
    9.2
  3. 3Bangkoklow-cost sensorsBangkok
    9.0
  4. 4Khlong Luanglow-cost sensorsPathum Thani
    8.9
  5. 5Bang Pakonglow-cost sensorsChachoengsao
    6.8
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

All cities in the world, June 2025 · Thailand now