| Characteristic | Achievement rate for water environmental standards |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
The chart is not accessible to screen readers. Please switch to the table view to access the data.
Download
Source
Source
Release date
January 2023
More information
Region
Japan
Survey time period
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
Citation formats
