Taipei--The air quality was poor in most parts of central Taiwan and some outlying islands Tuesday, according to the Environmental Protection Administration's Taiwan Air Quality Monitoring Network.
As of 11 a.m., the air quality index for all of Nantou County and parts of Taichung City and Changhua County as well as the Kinmen and Matsu islands flashed orange, meaning that the air quality in those areas was unhealthy for groups particularly sensitive to poorer air quality.
The air quality index was yellow, indicating fair air quality, for much of northern Taiwan, including the greater Taipei area, most parts of Taoyuan City and Hsinchu and Miaoli counties, and Yilan County in eastern Taiwan.
It was also yellow for most parts of southern counties, including Yunlin and Pingtung, according to the network (http://taqm.epa.gov.tw/taqm/en/).
The air quality index in Hualien and Taitung flashed green, meaning that the air quality was good in those regions.
The agency's six-color scale takes into account ozone, PM2.5 and PM10 particulates, carbon monoxide, sulfur dioxide and nitric oxide concentrations in the air.
Green represents "good" air quality, with a pollutant reading of 0-50; yellow indicates "moderate" at 51-100; orange means "unhealthy for sensitive groups" with a reading of 101-150; red indicates "unhealthy" with a range of 151-200; purple signifies "very unhealthy" with a level of 201-300; maroon represents "hazardous" with a reading of 301-500.
Source: Focus Taiwan News Channel