What is the air quality trend in Chiang Mai?

Over the past 3 days, Chiang Mai had an average AQI of 170 based on station measurements. The worst day was with AQI .

How is Chiang Mai air quality measured?

Air quality in Chiang Mai is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Chiang Mai, Thailand

Name: Chiang Mai Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Chiang Mai, Thailand.

178

Current AQI
Unhealthy

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

41h · 78 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-10	162	116–188	84.0 µg/m³	93.4	20h	80
2026-04-09	168	68–199	103.2 µg/m³	110.1	20h	58
2026-04-08	180	180–180	112.0 µg/m³	118.0	1h	1

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