BANGKOK: With PM2.5 pollution levels reaching the orange zone, BMA has advised residents to wear PM2.5-proof masks and limit outdoor activities
Bangkok’s air quality plunged to the orange or dangerous to health level on Wednesday (Dec 4) morning, the Bangkok Metropolitan Administration (BMA) said.
The BMA’s Air Quality Index Centre reported that almost all of its 63 monitoring stations across 50 districts recorded orange-level air quality at 7am, with only two stations showing yellow-level readings and none reporting green, or good levels.
The centre classified air quality into five levels based on PM2.5 particulate concentrations:
Blue (very good): 0-15 micrograms per cubic metre of air (µg/m³)
Green (good): 15.1-25 µg/m³
Yellow (acceptable): 25.1-37.5 µg/m³
Orange (health impacting): 37.6-75 µg/m³
Red (severely health impacting): 75.3 µg/m³ and up
PM2.5 stands for particulate matter with a diameter of 2.5 micrometres or less. These tiny particles are invisible to the naked eye and can be easily inhaled deep into the lungs, causing a variety of health problems. - The Nation/ANN
