In 2023, the Biochemical Oxygen Demand (BOD) for Nakdong River in South Korea was 1.8 milligrams per liter. BOD is the amount of oxygen that is required to break down organic matter in water, and is used as an indicator for measuring water quality. According to the source, BOD that is lower than three milligrams per liter means the water quality is "slightly good", and there are small amounts of pollutants present in the water. Nakdong River flows through the major Korean cities Daegu and Busan.
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Statistics Korea. (September 30, 2024). Value of Biochemical Oxygen Demand (BOD) for Nakdong River in South Korea from 2014 to 2023 (in milligrams per liter) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 26, 2026, from /statistics/1129918/south-korea-biochemical-oxygen-demand-nakdong-river/
Statistics Korea. "Value of Biochemical Oxygen Demand (BOD) for Nakdong River in South Korea from 2014 to 2023 (in milligrams per liter)." Chart. September 30, 2024. ÌÇÐÄÆƽâ°æ. Accessed July 26, 2026. /statistics/1129918/south-korea-biochemical-oxygen-demand-nakdong-river/
Statistics Korea. (2024). Value of Biochemical Oxygen Demand (BOD) for Nakdong River in South Korea from 2014 to 2023 (in milligrams per liter). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 26, 2026. /statistics/1129918/south-korea-biochemical-oxygen-demand-nakdong-river/
Statistics Korea. "Value of Biochemical Oxygen Demand (Bod) for Nakdong River in South Korea from 2014 to 2023 (in Milligrams per Liter)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 30 Sep 2024, /statistics/1129918/south-korea-biochemical-oxygen-demand-nakdong-river/
Statistics Korea, Value of Biochemical Oxygen Demand (BOD) for Nakdong River in South Korea from 2014 to 2023 (in milligrams per liter) ÌÇÐÄÆƽâ°æ, /statistics/1129918/south-korea-biochemical-oxygen-demand-nakdong-river/ (last visited July 26, 2026)
Value of Biochemical Oxygen Demand (BOD) for Nakdong River in South Korea from 2014 to 2023 (in milligrams per liter) [Graph], Statistics Korea, September 30, 2024. [Online]. Available: /statistics/1129918/south-korea-biochemical-oxygen-demand-nakdong-river/
