The air quality in Kinmen and Matsu flashed a red light Monday, indicating that it was unhealthy for the general public, according to the network (http://taqm.epa.gov.tw/taqm/en/), which is a unit of the Environmental Protection Administration (EPA).
Meanwhile, the air quality in Zhushan in the central Taiwan county of Nantou and Yunlin, Chiayi, Tainan, Kaohsiung and Pingtung in the south flashed an orange light, indicating that it was unhealthy for sensitive groups.
The network said a continued orange light is expected in Yunlin, Chiayi, Tainan, Kaohsiung and Pingtung on Tuesday, while in the rest of Taiwan the air quality is likely to be good to moderate, flashing green or yellow lights.
The EPA's color-coded air quality rating takes into account ozone, PM2.5 and PM10 particulate levels, and the concentration of carbon monoxide, sulfur dioxide and nitric oxide in the air.
Green represents good air quality, with a pollutant reading of less than 50; yellow indicates moderate, with a reading of 50-100; orange means unhealthy for sensitive groups, reading 101-150; red signals unhealthy quality in the range of 151-200; purple signifies very unhealthy at a level of 201-300; and maroon warns of hazardous air quality, with a reading of 301-500.
Source: Focus Taiwan News Channel