News (May 8th, 2015): Noticed a change in PM10 AQI data? Hourly data (InstantCast) is now in use (more info).
Air Quality Data provided by the Division of Air Quality Data, Air Quality and Noise Management Bureau, Pollution Control Department. (aqmthai.com)
Note that the measurements for PM2.5 (fine particulate matter), PM10 (respirable particulate matter), NO2 (nitrogen dioxide), SO2 (sulfur dioxide), O3 (ozone) and CO (carbon monoxide) are taken from the station Chokchai Police Station, Bangkok