Akita, Japan
County page for 13 named lakes in Japan. Official surface phosphorus, chlorophyll-a, and Secchi — not a swim-safety class and not a LakeQuality letter.
Lake map
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Named lakes
| Lake | Place | Total phosphorus | Chlorophyll-a | Secchi | Year |
|---|---|---|---|---|---|
| 二ノ目潟 | Akita | 11 µg/L | — | 5.0 m | 2024 |
| 八郎湖 | Akita | 84 µg/L | — | 0.6 m | 2025 |
| 十和田湖 | Akita | 4.0 µg/L | — | 11 m | 2024 |
| 夏瀬ダム | Akita | 6.0 µg/L | — | 5.0 m | 2024 |
| 岩見ダム | Akita | 14 µg/L | — | 2.4 m | 2024 |
| 旭川ダム | Akita | 10 µg/L | — | 2.5 m | 2024 |
| 森吉ダム | Akita | 11 µg/L | — | 3.5 m | 2024 |
| 田沢湖 | Akita | 3.0 µg/L | — | 10 m | 2024 |
| 皆瀬ダム | Akita | 16 µg/L | — | 1.6 m | 2024 |
| 空素沼 | Akita | 26 µg/L | — | 1.5 m | 2024 |
| 素波里ダム | Akita | 15 µg/L | — | 1.4 m | 2024 |
| 萩形ダム | Akita | 16 µg/L | — | 1.9 m | 2024 |
| 鎧畑ダム | Akita | 5.5 µg/L | — | 5.5 m | 2024 |
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