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PM2.5 rises across Bangkok as eastern areas see health impacts begin

SUNDAY, JANUARY 25, 2026

Some parts of Bangkok recorded orange-level air quality on January 25, with residents advised to protect themselves and watch for symptoms.

  • PM2.5 pollution levels have risen in Bangkok, with several districts exceeding the health safety standard of 37.5 µg/m³.
  • Eastern Bangkok is the most affected area, with the Lat Krabang district recording the highest PM2.5 level at 47.6 µg/m³.
  • The elevated pollution has triggered "Orange-level" health warnings, advising the public to wear protective masks and limit strenuous outdoor activities.

The Bangkok Air Quality Information Centre reported the particulate matter (PM2.5) situation in Bangkok on Sunday (January 25) at 7am.

PM2.5 levels surged to the highest levels and exceeded the standard threshold, affecting the respiratory system.

Bangkok average: 32.2 micrograms per cubic metre (µg/m³) (standard: 37.5 µg/m³)

Top 12 Bangkok districts with the highest PM2.5 levels

  1. Lat Krabang — 47.6 µg/m³
  2. Prawet — 42.6 µg/m³
  3. Phra Khanong — 40.9 µg/m³
  4. Pathum Wan — 38.7 µg/m³
  5. Bang Rak — 38.5 µg/m³
  6. Pom Prap Sattru Phai — 37.4 µg/m³
  7. Bang Khun Thian — 37.3 µg/m³
  8. Khlong Sam Wa — 37.2 µg/m³
  9. Khan Na Yao — 36.8 µg/m³
  10. Nong Chok — 36.6 µg/m³
  11. Ratchathewi — 36.1 µg/m³
  12. Bang Phlat — 35.8 µg/m³

Area-level PM2.5 ranges and overview

  • Northern Bangkok: 29.7–34.5 µg/m³ — Moderate
  • Eastern Bangkok: 27.9–47.6 µg/m³ — Moderate
  • Central Bangkok: 25.0–37.4 µg/m³ — Moderate
  • Southern Bangkok: 24.9–40.9 µg/m³ — Moderate
  • Northern Thon Buri: 24.8–35.8 µg/m³ — Moderate
  • Southern Thon Buri: 23.5–37.3 µg/m³ — Moderate

Orange-level air quality health impacts begin

  • General public: Use protective equipment such as a PM2.5 mask every time you go outdoors. Limit the duration of strenuous outdoor activities or exercise. Watch for unusual symptoms such as coughing, shortness of breath, or eye irritation.
  • At-risk groups: Use protective equipment such as a PM2.5 mask every time you go outdoors. Avoid strenuous outdoor activities or exercise. Follow medical advice. If abnormal symptoms occur, seek medical attention promptly.