Hiroshima, Japan
County page for 9 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 |
|---|---|---|---|---|---|
| 三川ダム貯水池 | Hiroshima | 35 µg/L | — | 2.3 m | 2025 |
| 八田原ダム貯水池 | Hiroshima | 25 µg/L | — | 2.3 m | 2025 |
| 土師ダム貯水池 | Hiroshima | 19 µg/L | — | 0.6 m | 2025 |
| 小瀬川ダム貯水池 | Hiroshima | 11 µg/L | — | 2.6 m | 2025 |
| 帝釈川ダム貯水池 | Hiroshima | 20 µg/L | — | 2.3 m | 2025 |
| 弥栄ダム貯水池 | Hiroshima | 8.0 µg/L | — | 5.8 m | 2025 |
| 渡ノ瀬ダム貯水池 | Hiroshima | 19 µg/L | — | 2.1 m | 2025 |
| 渡之瀬ダム貯水池 | Hiroshima | 17 µg/L | — | — | 2021 |
| 温井ダム貯水池 | Hiroshima | 8.0 µg/L | — | 4.7 m | 2025 |
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