In the fiscal year 2021, the achievement rate for water quality standards of rivers in Japan amounted to around 93.1 percent, a slight decrease from the previous fiscal year. The overall water quality standard, including rivers, lakes, and sea areas, amounted to around 88.3 percent in that fiscal year.
Achievement rate for water quality standards of rivers in Japan from fiscal year 2012 to 2021
Characteristic
Achievement rate for water environmental standards
fiscal year 2012 to 2021; the Japanese fiscal year starts on April 1 of the stated year and ends on March 31 of the following year
Supplementary notes
The achievement rate for rivers was based on the biochemical oxygen demand (BOD).
The source provides the following calculation: achievement rate (%) = (number of water areas meeting the standards / number of water areas in a specified type) × 100
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MOE (Japan). (January 1, 2023). Achievement rate for water quality standards of rivers in Japan from fiscal year 2012 to 2021 [Graph]. In Statista. Retrieved December 21, 2024, from https://www.statista.com/statistics/1249239/japan-water-quality-standards-rivers-compliance-rate/
MOE (Japan). "Achievement rate for water quality standards of rivers in Japan from fiscal year 2012 to 2021." Chart. January 1, 2023. Statista. Accessed December 21, 2024. https://www.statista.com/statistics/1249239/japan-water-quality-standards-rivers-compliance-rate/
MOE (Japan). (2023). Achievement rate for water quality standards of rivers in Japan from fiscal year 2012 to 2021. Statista. Statista Inc.. Accessed: December 21, 2024. https://www.statista.com/statistics/1249239/japan-water-quality-standards-rivers-compliance-rate/
MOE (Japan). "Achievement Rate for Water Quality Standards of Rivers in Japan from Fiscal Year 2012 to 2021." Statista, Statista Inc., 1 Jan 2023, https://www.statista.com/statistics/1249239/japan-water-quality-standards-rivers-compliance-rate/
MOE (Japan), Achievement rate for water quality standards of rivers in Japan from fiscal year 2012 to 2021 Statista, https://www.statista.com/statistics/1249239/japan-water-quality-standards-rivers-compliance-rate/ (last visited December 21, 2024)
Achievement rate for water quality standards of rivers in Japan from fiscal year 2012 to 2021 [Graph], MOE (Japan), January 1, 2023. [Online]. Available: https://www.statista.com/statistics/1249239/japan-water-quality-standards-rivers-compliance-rate/
