In 2022, the Chemical Oxygen Demand (COD) for the Han River in South Korea was 3.4 milligrams per liter. COD is the amount of oxygen required to break down organic and inorganic matter in water and is used as an indicator for measuring water quality.
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Statistics Korea. (April 20, 2023). Value of Chemical Oxygen Demand (COD) for the Han River in South Korea from 2013 to 2022 (in milligrams per liter) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 24, 2026, from /statistics/1446994/south-korea-cod-demand-han-river/
Statistics Korea. "Value of Chemical Oxygen Demand (COD) for the Han River in South Korea from 2013 to 2022 (in milligrams per liter)." Chart. April 20, 2023. ÌÇÐÄÆƽâ°æ. Accessed July 24, 2026. /statistics/1446994/south-korea-cod-demand-han-river/
Statistics Korea. (2023). Value of Chemical Oxygen Demand (COD) for the Han River in South Korea from 2013 to 2022 (in milligrams per liter). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 24, 2026. /statistics/1446994/south-korea-cod-demand-han-river/
Statistics Korea. "Value of Chemical Oxygen Demand (Cod) for The Han River in South Korea from 2013 to 2022 (in Milligrams per Liter)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 20 Apr 2023, /statistics/1446994/south-korea-cod-demand-han-river/
Statistics Korea, Value of Chemical Oxygen Demand (COD) for the Han River in South Korea from 2013 to 2022 (in milligrams per liter) ÌÇÐÄÆƽâ°æ, /statistics/1446994/south-korea-cod-demand-han-river/ (last visited July 24, 2026)
Value of Chemical Oxygen Demand (COD) for the Han River in South Korea from 2013 to 2022 (in milligrams per liter) [Graph], Statistics Korea, April 20, 2023. [Online]. Available: /statistics/1446994/south-korea-cod-demand-han-river/
