Lakes in Yvelines, France
Find lakes in Yvelines: county page for 8 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 |
|---|---|---|---|---|---|
| Base de Plein Air Et de Loisirs de Moisson-Mousseaux | Yvelines | — | 3.0 µg/L | 1.7 m | 2025 |
| Etang de Corbet | Yvelines | — | 37 µg/L | 0.2 m | 2025 |
| Etang de la Grosse Pierre | Yvelines | — | 42 µg/L | 0.9 m | 2022 |
| Etang de Pourras | Yvelines | — | 73 µg/L | 0.4 m | 2022 |
| Etang de Saint-Hubert | Yvelines | — | 23 µg/L | 0.4 m | 2025 |
| Etang de Saint-Quentin | Yvelines | — | 6.0 µg/L | 1.2 m | 2024 |
| Etang du Gallardon | Yvelines | — | 4.0 µg/L | 4.2 m | 2025 |
| Etang du Rouillard | Yvelines | — | 8.5 µg/L | 2.5 m | 2025 |
Frequently asked questions
- How many named lakes are in Yvelines?
- 8 named lakes in Yvelines, France, have official chlorophyll-a and Secchi, 2022–2025. Values are measurements, not a LakeQuality A–F grade.
- Does LakeQuality grade lakes in Yvelines?
- No. Yvelines pages show official phosphorus, chlorophyll-a, and Secchi from the publishing authority. A letter on the LakeQuality scale would be an invention.