the average levels of PM2.5 were measured during 24-hour period
Supplementary notes
Particulate matter (PM) is a mixture of solid and liquid particle that is suspended in the air. PM2.5 are fine particles with a diameter less than 2.5 micrometers (more than 100 times thinner than a human hair) and remain suspended for a longer period in the air. Fine particles are also harmful to the lungs, causing asthma and worsening health conditions such as heart disease and arthritis.
In 2024, there were ** micrograms of PM2.5 particles per cubic meter found in the air in northern Thailand, on average. The air quality in the north is likely to have improved compared to previous years.
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Pollution Control Department (Thailand). (July 14, 2025). Average levels of particulate matter (PM2.5) in the air in the northern region of Thailand from 2020 to 2024 (in micrograms per cubic meter) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 31, 2026, from /statistics/1296177/thailand-average-pm25-particle-levels-in-the-north/
Pollution Control Department (Thailand). "Average levels of particulate matter (PM2.5) in the air in the northern region of Thailand from 2020 to 2024 (in micrograms per cubic meter)." Chart. July 14, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 31, 2026. /statistics/1296177/thailand-average-pm25-particle-levels-in-the-north/
Pollution Control Department (Thailand). (2025). Average levels of particulate matter (PM2.5) in the air in the northern region of Thailand from 2020 to 2024 (in micrograms per cubic meter). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 31, 2026. /statistics/1296177/thailand-average-pm25-particle-levels-in-the-north/
Pollution Control Department (Thailand). "Average Levels of Particulate Matter (Pm2.5) in The Air in The Northern Region of Thailand from 2020 to 2024 (in Micrograms per Cubic Meter)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 14 Jul 2025, /statistics/1296177/thailand-average-pm25-particle-levels-in-the-north/
Pollution Control Department (Thailand), Average levels of particulate matter (PM2.5) in the air in the northern region of Thailand from 2020 to 2024 (in micrograms per cubic meter) ÌÇÐÄÆƽâ°æ, /statistics/1296177/thailand-average-pm25-particle-levels-in-the-north/ (last visited July 31, 2026)
Average levels of particulate matter (PM2.5) in the air in the northern region of Thailand from 2020 to 2024 (in micrograms per cubic meter) [Graph], Pollution Control Department (Thailand), July 14, 2025. [Online]. Available: /statistics/1296177/thailand-average-pm25-particle-levels-in-the-north/
