Miyagi, Japan
County page for 11 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 |
|---|---|---|---|---|---|
| 七ケ宿ダム | Miyagi | 8.0 µg/L | — | 3.2 m | 2025 |
| 七北田ダム | Miyagi | 19 µg/L | — | — | 2024 |
| 伊豆沼 | Miyagi | 98 µg/L | — | — | 2024 |
| 南川ダム | Miyagi | 15 µg/L | — | — | 2024 |
| 大倉ダム | Miyagi | 8.0 µg/L | — | — | 2024 |
| 栗駒ダム | Miyagi | 8.0 µg/L | — | — | 2024 |
| 樽水ダム | Miyagi | 12 µg/L | — | — | 2024 |
| 漆沢ダム | Miyagi | 24 µg/L | — | — | 2024 |
| 花山ダム | Miyagi | 13 µg/L | — | — | 2024 |
| 釜房ダム | Miyagi | 17 µg/L | — | 2.3 m | 2025 |
| 鳴子ダム | Miyagi | 18 µg/L | — | 2.1 m | 2025 |
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