BANGKOK, Thailand – The Pollution Control Department (PCD) has warned that PM2.5 levels across almost all districts of Bangkok have reached the orange tier, indicating concentrations that are beginning to affect public health. Officials expect the situation to persist and require close monitoring until 11 December, as stagnant air and weak winds continue to trap pollution over the capital.
PCD Director-General Surin Warakijthamrong said current atmospheric conditions are preventing the dispersion of fine dust, pushing PM2.5 levels above safe limits in many areas. In response, Bangkok city authorities have activated Work-from-Home measures during peak pollution days to reduce road traffic and emissions. The Ministry of Natural Resources and Environment has adopted the same practice as a model for other agencies.
Nationwide, 16 provinces have also recorded PM2.5 levels above the standard in some areas, including:
Pathum Thani, Nonthaburi, Nakhon Pathom, Samut Sakhon, Samut Prakan, Lamphun, Chiang Mai, Sukhothai, Uthai Thani, Sing Buri, Ang Thong, Samut Songkhram, Phetchaburi, Chachoengsao, Chonburi, and Rayong.
According to the seven-day forecast for 5–11 December 2025:
Bangkok and its surrounding provinces are expected to see continued increases in PM2.5 levels.
Parts of 17 northern provinces may also experience rising pollution.
The Northeast and East will require close monitoring.
The South is expected to maintain good air quality.
Health Advisory
General public: Limit outdoor activities, monitor symptoms, and wear a protective mask when outside.
Vulnerable groups—elderly people, children, and those with respiratory conditions—should avoid high-pollution areas and seek medical attention if symptoms appear.
Residents can check real-time air quality updates at www.air4thai.com, www.airbkk.com, or via the Air4Thai and AirBKK mobile apps. (TNA)
