Lakes in Ille-et-Vilaine, France
Find lakes in Ille-et-Vilaine: county page for 13 named lakes in France. 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 |
|---|---|---|---|---|---|
| Etang D'Ouee | Ille-et-Vilaine | 25 µg/L | 5.5 µg/L | 0.8 m | 2025 |
| Etang de Carcraon | Ille-et-Vilaine | 450 µg/L | 20 µg/L | 0.5 m | 2025 |
| Etang de Chatillon | Ille-et-Vilaine | 450 µg/L | 35 µg/L | 0.5 m | 2023 |
| Etang de la Forge | Ille-et-Vilaine | 195 µg/L | 22 µg/L | 0.6 m | 2023 |
| Etang de la Musse | Ille-et-Vilaine | 70 µg/L | 11 µg/L | 0.7 m | 2023 |
| Etang de Paimpont | Ille-et-Vilaine | — | 10 µg/L | 0.7 m | 2022 |
| Etang de Pain Tourteau | Ille-et-Vilaine | 30 µg/L | 5.1 µg/L | 1.2 m | 2023 |
| Etang de Tremelin | Ille-et-Vilaine | — | 3.0 µg/L | 1.5 m | 2024 |
| Etang du Pas du Houx | Ille-et-Vilaine | 65 µg/L | 8.7 µg/L | 1.1 m | 2021 |
| Gravieres de L'Etang de la Chaise | Ille-et-Vilaine | — | 12 µg/L | 1.4 m | 2016 |
| Retenue de la Chapelle Erbree | Ille-et-Vilaine | 40 µg/L | 10 µg/L | 0.8 m | 2023 |
| Retenue de la Cheze | Ille-et-Vilaine | 10 µg/L | 4.2 µg/L | 2.8 m | 2023 |
| Retenue de la Valiere | Ille-et-Vilaine | 30 µg/L | 10 µg/L | 1.5 m | 2023 |
Frequently asked questions
- How many named lakes are in Ille-et-Vilaine?
- 13 named lakes in Ille-et-Vilaine, France, have official phosphorus, chlorophyll-a, and Secchi, 2016–2025. Values are measurements, not a LakeQuality A–F grade.
- Does LakeQuality grade lakes in Ille-et-Vilaine?
- No. Ille-et-Vilaine pages show official phosphorus, chlorophyll-a, and Secchi from the publishing authority. A letter on the LakeQuality scale would be an invention.