PM2.5 in a Bangkok Home: Which Number Actually Matters, and Why a Higher Floor Is Not the Answer
Thailand's PM2.5 standard is 37.5 micrograms per cubic metre over 24 hours and 15 as an annual average, in force since 1 June 2023. The WHO guideline is 15 and 5. Thai and US air quality indexes use different breakpoints, so the same air produces different AQI numbers. Compare the microgram figure instead.




