Japan: compliance rate of environmental standards for lakes 2015

The statistic presents the compliance rate of environmental standards for nitrogen and phosphorous in lakes in Japan from fiscal year 2006 to 2015. In fiscal year 2015, the compliance rate of lake water standards reached 51.2 percent, representing a slight increase from around 50.4 percent in the previous year.

Compliance rate of environmental standards for nitrogen and phosphorus in lakes in Japan from fiscal year 2006 to 2015

Characteristic	Achievement rate for environmental standards
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Release date

September 2017

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Region

Japan

Survey time period

fiscal year 2006 to 2015; the Japanese fiscal year starts on April 1 of the stated year and ends on March 31 of the following year

Supplementary notes

The source provides the following calculation: compliance rate (%) = (number of water areas meeting the standards / number of type-designated water areas) × 100
For the water areas subject to environment standards both for total nitrogen and total phosphorus, they are classified as water area achieving the standard only when both total nitrogen and total phosphorus fulfill the environment standards.

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