In 2022, the air pollution level of NO2 in Seoul amounted to ** parts per billion, down from ** parts per billion in 2009. The annual emissions of NO2 in the year decreased over the years; the value recorded in the last three years was the lowest in the past decade.
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Ministry of Climate, Energy and Environment. (August 9, 2024). Annual air pollution level of nitrogen dioxide (NO2) in Seoul in South Korea from 2009 to 2022 (in parts per billion) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 28, 2026, from /statistics/1016259/south-korea-no2-air-pollution-level-seoul/
Ministry of Climate, Energy and Environment. "Annual air pollution level of nitrogen dioxide (NO2) in Seoul in South Korea from 2009 to 2022 (in parts per billion)." Chart. August 9, 2024. ÌÇÐÄÆƽâ°æ. Accessed July 28, 2026. /statistics/1016259/south-korea-no2-air-pollution-level-seoul/
Ministry of Climate, Energy and Environment. (2024). Annual air pollution level of nitrogen dioxide (NO2) in Seoul in South Korea from 2009 to 2022 (in parts per billion). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 28, 2026. /statistics/1016259/south-korea-no2-air-pollution-level-seoul/
Ministry of Climate, Energy and Environment. "Annual Air Pollution Level of Nitrogen Dioxide (No2) in Seoul in South Korea from 2009 to 2022 (in Parts per Billion)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 9 Aug 2024, /statistics/1016259/south-korea-no2-air-pollution-level-seoul/
Ministry of Climate, Energy and Environment, Annual air pollution level of nitrogen dioxide (NO2) in Seoul in South Korea from 2009 to 2022 (in parts per billion) ÌÇÐÄÆƽâ°æ, /statistics/1016259/south-korea-no2-air-pollution-level-seoul/ (last visited July 28, 2026)
Annual air pollution level of nitrogen dioxide (NO2) in Seoul in South Korea from 2009 to 2022 (in parts per billion) [Graph], Ministry of Climate, Energy and Environment, August 9, 2024. [Online]. Available: /statistics/1016259/south-korea-no2-air-pollution-level-seoul/
