<b>Assessment of indoor and outdoor </b><b>formaldehyde, total volatile organic compounds (TVOC), and particulate matter (PM2.5, and PM10) levels in Kalasin</b><b>, Thailand</b>

The study was conducted in Kalasin Province in order to determine the levels of formaldehyde, TVOCs, PM2.5, and PM10 present in the air both inside and outside at seven different locations. These locations included important roadways, residential neighborhoods, shopping centers, motorcycle repair shops, gas stations, industrial zones, and rural areas. The findings revealed that formaldehyde levels in stores and motorbike maintenance facilities exceed the Thai Air Standard. This is an important discovery that can help improve air quality in these areas.