Thailand’s standard for safe levels of PM2.5 (particles less than 2.5 micrometres in diameter) is 50μg/m3.
The two areas are:
1. Omnoi subdistrict, Krathum Baen district, Samut Sakhon province (54μg/m3)
2. Mahachai subdistrict, Muang district, Samut Sakhon (58μg/m3).
People in provinces where the PM2.5 pollution is bad have been advised to monitor their health and reduce time spent on outdoor activities, especially the elderly, children, and patients with respiratory diseases.
The PM2.5 situation can be followed on the Air4Thai.com website or smartphone app, or via bangkokairquality.com.