Taipei, March 20 (CNA) The air quality was unhealthy for the general public in southern Taiwan's Tainan City and the offshore county of Kinmen Monday while eastern Taiwan enjoyed good air quality, according to the Environmental Protection Administration's (EPA's) Taiwan Air Quality Monitoring Network.
As of 12 a.m., the central county of Nantou and most parts of Yunlin, Chiayi Counties and Kaohsiung City flashed orange, indicating the air quality in these areas was dangerous for sensitive groups such as young children, the elderly and people with a chronic disease, according to the network (http://taqm.epa.gov.tw/taqm/en/).
The eastern counties of Yilan, Hualien and Taitung and the southern tip of Pingtung County in the south had good air quality (green) while in northern Taiwan, including Hsinchu and Miaoli Counties, the islands of Penghu and Matsu and the rest of Pingtung, the air quality was moderate to good, the network said.
For Tuesday, the air quality in Yilan, Hualien and Taitung is expected to be moderate while the rest of the country will likely see air that is unhealthy for the sensitive groups.
The EPA'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 less than 50; yellow indicates "moderate" at 50-100; 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.