Air quality picture mixed Saturday, poor in southwest

Taipei--Air quality was moderate to good in northern and eastern Taiwan but unhealthy for sensitive groups in the southwestern part of the country, according to the Environmental Protection Administration's Taiwan Air Quality Monitoring Network.

As of 10 a.m., the air quality in most parts of Kaohsiung City, Tainan City, Yunlin County and some parts of Changhua, Chiayi and Pingtung Counties flashed orange, meaning the air was unhealthy for sensitive groups, such as young children, the elderly and people with a chronic disease, according to the network (

For the rest of the country, the air quality was either moderate (yellow) or good (green), such as eastern Taiwan's Taitung County and the western islands of Penghu.

For Sunday, air quality is expected to be moderate in the eastern half of Taiwan but unhealthy for sensitive groups in the rest of the country, according to the website.

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 an index reading of 0-50; yellow indicates moderate with a reading of 50-100; orange means unhealthy air quality for sensitive groups with a reading of 101-150; red indicates unhealthy quality with a range of 151-200; purple signifies very unhealthy levels at 201-300; and maroon represents hazardous levels at a reading of 301-500.

Source: Focus Taiwan News Channel