In the fiscal year 2021, the achievement rate for water quality standards of sea areas in Japan amounted to around 78.6 percent. Figures hit a decade-low in 2013, reaching only 77.3 percent. The overall water quality standard, including rivers, lakes, and sea areas, amounted to close to 88.3 percent in that fiscal year.
Achievement rate for water quality standards of sea areas 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
For lakes, and sea areas, the achievement rate was based on the chemical oxygen demand (COD).
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 sea areas in Japan from fiscal year 2012 to 2021 [Graph]. In Statista. Retrieved November 24, 2024, from https://www.statista.com/statistics/1249245/japan-water-quality-standards-sea-areas-compliance-rate/
MOE (Japan). "Achievement rate for water quality standards of sea areas in Japan from fiscal year 2012 to 2021." Chart. January 1, 2023. Statista. Accessed November 24, 2024. https://www.statista.com/statistics/1249245/japan-water-quality-standards-sea-areas-compliance-rate/
MOE (Japan). (2023). Achievement rate for water quality standards of sea areas in Japan from fiscal year 2012 to 2021. Statista. Statista Inc.. Accessed: November 24, 2024. https://www.statista.com/statistics/1249245/japan-water-quality-standards-sea-areas-compliance-rate/
MOE (Japan). "Achievement Rate for Water Quality Standards of Sea Areas in Japan from Fiscal Year 2012 to 2021." Statista, Statista Inc., 1 Jan 2023, https://www.statista.com/statistics/1249245/japan-water-quality-standards-sea-areas-compliance-rate/
MOE (Japan), Achievement rate for water quality standards of sea areas in Japan from fiscal year 2012 to 2021 Statista, https://www.statista.com/statistics/1249245/japan-water-quality-standards-sea-areas-compliance-rate/ (last visited November 24, 2024)
Achievement rate for water quality standards of sea areas in Japan from fiscal year 2012 to 2021 [Graph], MOE (Japan), January 1, 2023. [Online]. Available: https://www.statista.com/statistics/1249245/japan-water-quality-standards-sea-areas-compliance-rate/
