Kumamoto, Japan
County page for 3 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 |
|---|---|---|---|---|---|
| 市房ダム貯水池 | Kumamoto | 15 µg/L | — | 1.1 m | 2025 |
| 竜門ダム貯水池 | Kumamoto | 11 µg/L | — | 3.4 m | 2025 |
| 緑川ダム貯水池 | Kumamoto | 29 µg/L | — | 2.4 m | 2025 |
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