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| Title | 図4-1-22 公共用水域の環境基準（BOD又はCOD）達成率の推移 |
|---|---|
| URL | https://www.env.go.jp/policy/hakusyo/h29/excel/fd2_4_1_22.xls |
| Description | |
| Format | XLS |
| File Size | |
| Last Modified Date | October 23, 2025 |
| License | CC BY |
| Copyright | |
| Language | ja |