By THE NATION
As of 7am on Saturday (January 25), the average particulate matter smaller than 2.5 microns (PM2.5) in the air was around 16 to 46 micrograms per cubic metre, which is below the department’s safety standard of 50µg/m3. However, it is still over the safety standard of the World Health Organization of 25 µg/m3 in a 24-hour mean.
Charts from the PCD show that air quality in Bangkok is mostly in "blue" (excellent) and "green" (good) levels, while certain districts such as Wangthonglang and Bang Kho Laem were "yellow", which means the air quality is at a moderate level. The department said that all outdoor activities are safe for all groups.