On Friday, October 20, Bangkok entered the list of the world's ten most polluted cities.

The Pollution Control Department (PCD) reports that in some areas of Bangkok, the air pollution levels with PM2.5 particles have risen to 48 micrograms per cubic meter (μg/m³). In other areas and suburbs of the capital, pollution levels ranged from 24.6 to 55.7 μg/m³.

According to the PCD, the high levels of PM2.5 air pollution will persist in the capital until October 28.

The Bangkok Metropolitan Administration advises people in high-pollution areas to reduce outdoor activities and wear protective masks if necessary. Anyone experiencing symptoms such as coughing, difficulty breathing, eye irritation, chest tightness, headaches, abnormal heartbeat, nausea, or fatigue is recommended to consult a doctor.

The PCD also reported an increase in PM2.5 levels in other parts of the country:

Northern region: pollution levels ranging from 6.0 to 29.6 μg/m³.

Northeastern region: 22.7 to 45.2 μg/m³.

Central and western regions: exceeding the standard in one area, with levels ranging from 19.1 to 41.0 μg/m³.

Eastern region: 13.5 to 35.6 μg/m³.

Southern region: low levels ranging from 4.9 to 15.1 μg/m³.