By THE NATION
As of 7am on Friday (January 24), the average particulate matter smaller than 2.5 microns (PM2.5) in the air was around 25 to 55 micrograms per cubic metre.
The PCD said the amount of particles in almost all areas was likely to decrease, as compared to Thursday’s reading.
One area with unhealthy level of particles -- in the orange zone -- was near Lat Phrao Soi 95 in Wang Thonglang district of Bangkok.
The PCD warned people living in this area to avoid outdoor activities and use self-protection equipment if needed.