Achievement rate for water quality standards of sea areas in Japan FY 2021, by area

In the fiscal year 2021, the achievement rate for water quality standards of Ariake Sea amounted to 87 percent, making up the highest rate among sea areas in Japan. In the same fiscal year, the overall achievement rate for water quality standards of sea areas in Japan amounted to around 78.6 percent.

在2021财政年度，对阿贺野海的饮用水质量标准达标率达到了87%，成为日本海域中最高水平。同年，日本海域饮用水质量标准整体达标率约为78.6%。