SmogRank / Countries / Thailand / Chiang Mai
Most polluted cities in Chiang Mai, Thailand
1 measured city, this year; 1 above the WHO annual guideline. Worst: Chiang Mai at 31.3 µg/m³, #119 in the world.
- 1Chiang Mailow-cost sensors 31.36.3×
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+
Estimated: cities without a monitor
Chiang Mai cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| San Kamphaeng | ≈ 10 µg/m³ |
| Hang Dong | ≈ 10 µg/m³ |
| San Pa Tong | ≈ 10 µg/m³ |
Updated 2026-10-01 19:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.