Clearest lakes in Germany
Clearest lakes in Germany: 52 named lakes have an official Secchi depth. The 20 below are ranked by that reading — water clarity, not a LakeQuality A–F grade.
Lake map
Highest Secchi readings in Germany
| Lake | Place | Total phosphorus | Chlorophyll-a | Secchi | Year |
|---|---|---|---|---|---|
| Obersee | Berchtesgadener Land | 7.0 µg/L | 3.0 µg/L | 12 m | 2022 |
| Alpsee Bei Schwangau | Ostallgäu | 5.0 µg/L | 2.0 µg/L | 11 m | 2023 |
| Eibsee | Garmisch-Partenkirchen | 5.0 µg/L | 2.0 µg/L | 11 m | 2022 |
| Weitsee | Traunstein | 6.0 µg/L | 2.0 µg/L | 9.0 m | 2023 |
| Königssee | Berchtesgadener Land | 6.0 µg/L | 2.0 µg/L | 8.9 m | 2024 |
| Brückelsee | Schwandorf | 6.0 µg/L | 2.0 µg/L | 8.4 m | 2020 |
| Murnersee | Schwandorf | 5.5 µg/L | 2.0 µg/L | 8.3 m | 2020 |
| Barmsee | Garmisch-Partenkirchen | 7.0 µg/L | 5.0 µg/L | 6.7 m | 2019 |
| Starnberger See | Starnberg | 6.0 µg/L | 2.0 µg/L | 6.2 m | 2023 |
| Steinberger See | Schwandorf | 7.0 µg/L | 2.0 µg/L | 6.0 m | 2024 |
| Langbürgner See | Rosenheim | 9.0 µg/L | 2.0 µg/L | 5.9 m | 2024 |
| Chiemsee | Traunstein | 8.0 µg/L | 2.0 µg/L | 5.5 m | 2022 |
| Walchensee | Bad Tölz-Wolfratshausen | — | 1.0 µg/L | 5.3 m | 2024 |
| Ausee | Schwandorf | — | 1.0 µg/L | 5.2 m | 2021 |
| Tegernsee | Miesbach | 6.0 µg/L | 2.0 µg/L | 5.2 m | 2023 |
| Kochelsee | Bad Tölz-Wolfratshausen | 7.0 µg/L | 2.0 µg/L | 4.6 m | 2022 |
| Wörthsee | Starnberg | 6.0 µg/L | 2.0 µg/L | 4.5 m | 2023 |
| Riegsee | Garmisch-Partenkirchen | 12 µg/L | 5.0 µg/L | 4.3 m | 2024 |
| Hartsee | Rosenheim | 11 µg/L | 3.0 µg/L | 4.1 m | 2022 |
| Sylvensteinsee | Bad Tölz-Wolfratshausen | 6.0 µg/L | 1.0 µg/L | 4.0 m | 2024 |
Showing 20 of 52 named lakes. Open a county or place page for the rest.
Frequently asked questions
- Which lakes in Germany are the clearest?
- 52 named lakes in Germany have an official Secchi depth. This page ranks the 20 deepest readings. Secchi is a clarity measurement, not a swim-safety class and not a LakeQuality A–F grade.
- Is clear water the same as clean water?
- No. Secchi measures how far a disk stays visible. A clear lake can still have bacteria, toxins, or contaminants this catalog does not grade. Open a lake page for the authority's values.
Clearest lakes in other countries
Named lakes and official measurements
Directory of official lake water quality
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