SmogRank / Countries / Thailand / June 2026

Most polluted cities in Thailand, June 2026

7 cities in Thailand ranked by their average PM2.5 over the 30 days. Worst: Uttaradit at 10.3 µg/m³, #359 of 1,918 cities in the world. Cleanest: Ban Khlong Prawet at 4.1. A city needs measurements on 70% of the days to be ranked.

  1. 1Uttaraditlow-cost sensorsUttaradit
    10.3
  2. 2Chiang Mailow-cost sensorsChiang Mai
    9.4
  3. 3Khlong Luanglow-cost sensorsPathum Thani
    6.0
  4. 4Bangkoklow-cost sensorsBangkok
    5.8
  5. 5Bang Pakonglow-cost sensorsChachoengsao
    5.0
  6. 6Sai Mailow-cost sensorsBangkok
    4.2
  7. 7Ban Khlong Prawetlow-cost sensorsBangkok
    4.1
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 2026 · Thailand now