Taiwan air quality in general is improving, despite recent protests.
However, although many members of the public would be surprised to hear it, leading environmental scientists and the EPA all concur that Taiwan’s air quality has actually improved over the last few years.
PM2.5 declined 17 percent between 2013 and 2016, according to the EPA.
The air quality around a particular recording station is measured once daily, called a “station day.” EPA’s Tsai explains that “in 2015 we had 997 unhealthy station days, but in 2017 we only experienced 483 unhealthy station days,” he says, a 50 percent reduction.
B.J. Tsuang (莊秉潔), a professor of environmental engineering at National Chung Hsing University in Taichung and an expert in air pollution, agrees, saying “last year the air quality in Taichung has had a really big improvement.”