What is the air quality trend in Chiang Mai?

Over the past 7 days, Chiang Mai had an average AQI of 192 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.

173

Current AQI
Unhealthy

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

111h · 78 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-10	159	116–188	80.8 µg/m³	90.6	18h	81
2026-04-09	168	68–199	103.1 µg/m³	110.1	20h	59
2026-04-08	177	154–194	106.3 µg/m³	114.0	11h	70
2026-04-07	176	152–230	101.9 µg/m³	112.2	24h	83
2026-04-06	189	159–237	120.4 µg/m³	129.9	17h	80
2026-04-04	226	187–283	173.6 µg/m³	187.4	15h	82
2026-04-03	250	176–273	196.7 µg/m³	212.6	6h	69

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