Abstract
Particulate Matter (PM) in the atmosphere has serious impacts on human health and the global environmental systems. To reduce anthropogenic PM emissions is of importance to protect public health. In this study, the variation of concentrations in PM<sub>2.5</sub>, NO<sub>2</sub>, and O<sub>3</sub> of Honam region over the past 6 years (2016-2021) was investigated. A statistical approach (i.e., hierarchical cluster analysis) was performed to present their spatial relationships. As a result, the high concentration of PM<sub>2.5</sub> in Iksan-si was found in sources of primary pollutants emitted from industrial complexes and ammonia from large-scale livestock complexes. The high concentration periods of PM<sub>2.5</sub> with lower concentrations of NO<sub>2</sub> and O<sub>3</sub> can be seasonal and secondary PM product contributions. In addition, the concentration of O<sub>3</sub> in Buan-gun and Wanju-gun with lower PM levels can be the effect of emission of volatile organic compounds (VOC<sub>S</sub>) from sources. It is necessary to strengthen management for reducing emissions by sources and to establish a policy to control precursors of the atmospheric contaminants.
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