Lakes in Seine-Maritime, France
Find lakes in Seine-Maritime: county page for 2 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 |
|---|---|---|---|---|---|
| Plan D'Eau D'Anneville-Ambourville | Seine-Maritime | — | 1.0 µg/L | 3.1 m | 2026 |
| Plan D'Eau de Jumieges | Seine-Maritime | — | 1.0 µg/L | 4.3 m | 2026 |
Frequently asked questions
- How many named lakes are in Seine-Maritime?
- 2 named lakes in Seine-Maritime, France, have official chlorophyll-a and Secchi, 2026. Values are measurements, not a LakeQuality A–F grade.
- Does LakeQuality grade lakes in Seine-Maritime?
- No. Seine-Maritime pages show official phosphorus, chlorophyll-a, and Secchi from the publishing authority. A letter on the LakeQuality scale would be an invention.