SmogRank / World / Asia / Thailand / Udon Thani

Most polluted cities in Udon Thani, Thailand

1 measured city, last 7 days; 0 above the WHO 24-hour guideline. Worst: Udon Thani at 10.3 µg/m³, #718 in the world.

Phetchabun: 1 measured cityNong KhaiLoeiSakon Nakhon: 1 measured cityKhon Kaen: 1 measured cityKalasin: 1 measured cityMaha Sarakham: 1 measured cityChaiyaphum: 1 measured cityUdon Thani: 1 measured cityNong Bua Lamphu: 1 measured cityBueng Kan#1 Udon Thani: 10.3 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
  1. 1Udon Thani 53
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

Estimated: cities without a monitor

Udon Thani 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.

City7-day estimateBand
Ban Phan Don≈ 5 µg/m³Good
Kut Chap≈ 4 µg/m³Good
Ban Nong Wua So≈ 5 µg/m³Good
Ban Dung≈ 4 µg/m³Good
Nam Som≈ 4 µg/m³Good

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SmogRank, most polluted cities in Udon Thani, Thailand, PM2.5, last 7 days to 2 Oct 2026, 05:00 UTC, smogrank.com/th/region/udon-thani?w=7d.

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Updated 2026-10-02 05:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.