The National Institute of Environmental Research, or NIER, is a research agency operated by the South Korean government. Its president is Seong-Kyu Yoon. It is charged with environmental research, education, international cooperation, and setting criterion levels for various pollutants. The main building for the institute is located in Gyeongseo-dong, Seo-gu, Incheon.
NIER was first established in 1978 as the National Environment Protection Institute. It gained its current name and status in 1986.
