Air Pollution Emission Report Released to Evaluate Control Results


With 2019 as the baseline year (TEDS11.0), the Taiwan Emission Data System was published on the EPA's TEDS website ( on 1 July for downloads. Compared with TEDS10.1 (with 2016 as the baseline year), the latest report shows a significant decrease in air pollutant emissions.

First compiled by the EPA in 1992, the TEDS is updated every three years (with the first year of the cycle as the data baseline) with reference to the three-year models of advanced nations like the US. With preparation beginning in the fourth quarter of 2019, TEDS11.0 covers every region in Taiwan (the main island, Penghu, Kinmen and Matsu). It includes an investigation on emissions from pollution sources in respective industries. The central and local governments collaborated, and together took a year and nine months to complete it, which is a year shorter than the time spent on previous versions.

Comparison with the latest TEDS (baseline year in 2019) and the one prior (baseline year in 2016) shows a 26% decrease in particulate matter (PM2.5), a 40% decrease in sulfur oxides (SOx), a 22% decrease in nitrogen oxides (NOx), and a 10% decrease in non-methane hydrocarbon (NMHC). Monitoring results also reveal a drop in average annual PM2.5 concentration by nearly 20% (from 20µg/m3 in 2015 to 16µg /m3 in 2019). The above reflects outstanding achievements resulted from the EPA’s various air pollution control programs in recent years.

The purpose of establishing TEDS is to help formulate pollution control strategies in government policies, verify reduction results, and serve as references in the simulation of emission increases from significant pollution sources. Other than updating all emission information at all times, the EPA will adequately implement the air pollution control programs from 2020 to 2023 and work with local governments to carry out 27 measures under four areas: stationary, fugitive, and mobile sources and comprehensive strategies. The end goal is for the average annual PM2.5 concentration to drop to 15µg/m3 as required by the air quality standards.

Excerpt from Major Environmental Policies, August 2021

Environmental Protection Administration, R.O.C.(Taiwan)
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