Updated PM2.5 levels this morning in Bangkok exceed standards at the orange level, beginning to affect health in 20 areas.
On 21 Dec 2025 GMT+7, the Bangkok Air Quality Information Center reported the PM2.5 situation from Bangkok's air quality monitoring stations on Sunday, 21 December 2025 at 07:00 AM GMT+7, presenting the 24-hour average PM2.5 levels.
Measurements ranged from 24.9 to 46.8 micrograms per cubic meter (µg/m³), exceeding the standard at the orange level, which begins to affect health (standard not exceeding 37.5 µg/m³). Twenty areas recorded these levels, which are:
1. Sathorn district, intersection in front of Sathorn District Office, Soi Saint Louis Road: 46.8 µg/m³.
2. Chatuchak district, in front of Kasetsart University: 46.4 µg/m³.
3. Bang Rak district, beside the police booth in front of Bang Rak Lovely Plaza: 44.8 µg/m³.
4. Nong Khaem district, three-way intersection near the police booth on Ma Charoen Road, Phetkasem 81: 44.5 µg/m³.
5. Lat Krabang district, in front of Nakharin Hospital: 44.0 µg/m³.
6. Phasi Charoen district, in front of Siam University (near Phetkasem 36), university entrance: 43.4 µg/m³.
7. Min Buri district, Chalerm Phrakiat Rama 9 Park opposite Min Buri District Office: 42.4 µg/m³.
8. Pathum Wan district, in front of Samyan Mitrtown Mall: 41.4 µg/m³.
9. Bang Sue district, inside Bang Sue District Office: 40.9 µg/m³.
10. Bang Kho Laem district, at the police booth at the intersection of Thonburi Road: 40.8 µg/m³.
11. Thonburi district, at the bus stop near Maihaisawan intersection: 40.8 µg/m³.
12. Bang Khen district, inside Bang Khen District Office: 39.9 µg/m³.
13. Khlong Sam Wa district, inside Khlong Sam Wa District Office: 39.7 µg/m³.
14. Bang Phlat district, inside Bang Phlat District Office: 39.2 µg/m³.
15. Taling Chan district, at the intersection of Phutthamonthon Sai 1 Road and Borommaratchachonnani Road: 38.3 µg/m³.
16. Bang Khun Thian district, inside Bang Khun Thian District Office: 38.2 µg/m³.
17. Lak Si district, inside Lak Si District Office: 38.0 µg/m³.
18. Thawi Watthana district, entrance to Sanam Luang 2: 37.9 µg/m³.
19. Prawet district, in front of Seacon Square shopping mall: 37.9 µg/m³.
20. Phra Nakhon district, inside Phra Nakhon District Office: 37.6 µg/m³.
The air quality index from Bangkok's monitoring stations mostly falls within the moderate air quality level.
The Meteorological Department forecasts cool weather in Bangkok during the morning.
Health advisory: Air quality at the orange level indicates health effects beginning.
For the general public: Use protective equipment such as PM2.5 masks whenever going outdoors. Limit time spent on strenuous outdoor activities or exercise. Watch for symptoms like coughing, difficulty breathing, or eye irritation.
For at-risk groups: Use protective equipment such as PM2.5 masks whenever going outdoors. Avoid strenuous outdoor activities or exercise. Follow doctors' advice and seek medical attention promptly if symptoms occur.
Related factors (forecasted weather conditions affecting PM2.5): From 21 to 22 Dec, air ventilation is "weak" while the near-surface atmosphere is closed with strong winds, suggesting moderate dust concentration. From 23 to 24 Dec, ventilation is "poor" with light winds, predicting moderate to higher dust levels before decreasing again from 25 Dec onward. Today’s forecast is cool mornings.
Satellite hotspot data from NASA shows no abnormal heat spots detected over Bangkok's surface area.
The Environment Office has coordinated with all relevant agencies to intensify measures under the dust control plan to mitigate the severity of PM2.5 pollution and its health effects. They encourage public participation and sector cooperation by adjusting behaviors and reducing dust-generating activities, promoting “5 ways to reduce dust you can do”: 1. Regularly clean homes by dust wiping; 2. Avoid burning waste and incense; 3. Plant trees to absorb pollutants and trap dust; 4. Use public transport; and 5. Turn off vehicle engines when parked and maintain engines to prevent excessive black smoke.
Alerts and public announcements encourage people to check air quality before leaving home via:
If the public notices pollution sources, they can report tips through Traffy Fondue.