In the fiscal year 2019, the achievement rate for water quality standards of lakes in Japan amounted to around 50 percent. Figures peaked in 2015, reaching almost 59 percent, but indicated a downwards trend in more recent years. Compared to the water quality standards of rivers, and sea areas, lakes recorded the lowest achievement rate in recent years.
Achievement rate for water quality standards of lakes in Japan from fiscal year 2010 to 2019
Characteristic
Achievement rate for water environmental standards
fiscal year 2010 to 2019; 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). (December 24, 2020). Achievement rate for water quality standards of lakes in Japan from fiscal year 2010 to 2019 [Graph]. In Statista. Retrieved November 18, 2024, from https://www.statista.com/statistics/1249244/japan-water-quality-standards-lakes-compliance-rate/
MOE (Japan). "Achievement rate for water quality standards of lakes in Japan from fiscal year 2010 to 2019." Chart. December 24, 2020. Statista. Accessed November 18, 2024. https://www.statista.com/statistics/1249244/japan-water-quality-standards-lakes-compliance-rate/
MOE (Japan). (2020). Achievement rate for water quality standards of lakes in Japan from fiscal year 2010 to 2019. Statista. Statista Inc.. Accessed: November 18, 2024. https://www.statista.com/statistics/1249244/japan-water-quality-standards-lakes-compliance-rate/
MOE (Japan). "Achievement Rate for Water Quality Standards of Lakes in Japan from Fiscal Year 2010 to 2019." Statista, Statista Inc., 24 Dec 2020, https://www.statista.com/statistics/1249244/japan-water-quality-standards-lakes-compliance-rate/
MOE (Japan), Achievement rate for water quality standards of lakes in Japan from fiscal year 2010 to 2019 Statista, https://www.statista.com/statistics/1249244/japan-water-quality-standards-lakes-compliance-rate/ (last visited November 18, 2024)
Achievement rate for water quality standards of lakes in Japan from fiscal year 2010 to 2019 [Graph], MOE (Japan), December 24, 2020. [Online]. Available: https://www.statista.com/statistics/1249244/japan-water-quality-standards-lakes-compliance-rate/
