SmogRank / World / Asia / Thailand / Khon Kaen

Most polluted cities in Khon Kaen, Thailand

1 measured city, this year; 1 above the WHO annual guideline. Worst: Khon Kaen at 26.6 µg/m³, #353 in the world.

Phetchabun: 1 measured cityLoei: 1 measured citySakon Nakhon: 1 measured cityKhon Kaen: 1 measured cityKalasin: 1 measured cityMaha Sarakham: 1 measured cityRoi Et: 1 measured cityChaiyaphum: 1 measured cityNakhon Ratchasima: 1 measured cityBuriram: 1 measured citySurin: 1 measured cityUdon Thani: 1 measured cityNong Bua Lamphu: 1 measured city#1 Khon Kaen: 26.6 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
  1. 1Khon Kaen 845.3×
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

Khon Kaen 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
Chum Phae≈ 4 µg/m³Good
Ban Phai≈ 5 µg/m³Good

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SmogRank, most polluted cities in Khon Kaen, Thailand, PM2.5, this year to 2 Oct 2026, 08:00 UTC, smogrank.com/th/region/khon-kaen?w=year.

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Updated 2026-10-02 08:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.