In the fiscal year 2021, the achievement rate for water quality standards of waters in Japan amounted to around 88.3 percent. Lakes recorded the lowest achievement rate, while rivers had the highest rate in that fiscal year.
Achievement rate for overall water quality standards 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 was based on biochemical oxygen demand (BOD) for rivers, and chemical oxygen demand (COD) for lakes, and sea areas.
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 overall water quality standards in Japan from fiscal year 2012 to 2021 [Graph]. In Statista. Retrieved November 21, 2024, from https://www.statista.com/statistics/1249253/japan-water-quality-standards-compliance-rate/
MOE (Japan). "Achievement rate for overall water quality standards in Japan from fiscal year 2012 to 2021." Chart. January 1, 2023. Statista. Accessed November 21, 2024. https://www.statista.com/statistics/1249253/japan-water-quality-standards-compliance-rate/
MOE (Japan). (2023). Achievement rate for overall water quality standards in Japan from fiscal year 2012 to 2021. Statista. Statista Inc.. Accessed: November 21, 2024. https://www.statista.com/statistics/1249253/japan-water-quality-standards-compliance-rate/
MOE (Japan). "Achievement Rate for Overall Water Quality Standards in Japan from Fiscal Year 2012 to 2021." Statista, Statista Inc., 1 Jan 2023, https://www.statista.com/statistics/1249253/japan-water-quality-standards-compliance-rate/
MOE (Japan), Achievement rate for overall water quality standards in Japan from fiscal year 2012 to 2021 Statista, https://www.statista.com/statistics/1249253/japan-water-quality-standards-compliance-rate/ (last visited November 21, 2024)
Achievement rate for overall water quality standards in Japan from fiscal year 2012 to 2021 [Graph], MOE (Japan), January 1, 2023. [Online]. Available: https://www.statista.com/statistics/1249253/japan-water-quality-standards-compliance-rate/
