Unsafe PM2.5 dust levels remain in many northern provinces
CHIANG MAI: The air quality in this northern province, which had been poor in the past 15 days due to the high levels of hazardous ultra-fine PM2.5 dust particles, slightly improved on Thursday morning after some rain on Wednesday evening.
However, unsafe levels of dust were still reported in most areas of Chiang Mai.
According to website Air4Thai.com of the Pollution Control Department, PM2.5 levels in many areas of Chiang Mai on Thursday morning were still over the…
