Clearest lakes in Sweden
Clearest lakes in Sweden: 55 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 Sweden
| Lake | Place | Total phosphorus | Chlorophyll-a | Secchi | Year |
|---|---|---|---|---|---|
| Stor-Tjultrasket Lake | — | 2.7 µg/L | 0.90 µg/L | 8.5 m | 2023 |
| Vittrasket Lake | — | 3.5 µg/L | 1.1 µg/L | 8.0 m | 2023 |
| Hokesjon | — | 5.2 µg/L | 2.8 µg/L | 6.7 m | 2021 |
| Vastra Solsjon | — | 1.9 µg/L | 2.1 µg/L | 6.7 m | 2023 |
| Spjutsjon | — | 3.9 µg/L | 1.3 µg/L | 6.0 m | 2023 |
| Hjartsjon | — | 5.3 µg/L | 1.3 µg/L | 5.6 m | 2023 |
| Ojsjon | — | 5.9 µg/L | 2.3 µg/L | 5.2 m | 2023 |
| Skarsjon | — | 7.8 µg/L | 3.2 µg/L | 5.1 m | 2023 |
| Ivosjon | — | 8.0 µg/L | 3.5 µg/L | 4.6 m | 2023 |
| Tangersjo Lake | — | 8.1 µg/L | 2.5 µg/L | 4.4 m | 2021 |
| Stor-Bjorsjon | — | 2.8 µg/L | 1.3 µg/L | 4.3 m | 2023 |
| Oversjon | — | 5.4 µg/L | 3.0 µg/L | 4.2 m | 2021 |
| Fjatsjon Ovre | — | 6.5 µg/L | 1.7 µg/L | 4.1 m | 2023 |
| Fyrsjon | — | 4.9 µg/L | 2.2 µg/L | 3.9 m | 2023 |
| Bosjon | — | 3.7 µg/L | 1.6 µg/L | 3.7 m | 2023 |
| Ulvsjon | — | 6.1 µg/L | 1.9 µg/L | 3.7 m | 2021 |
| Bastetrask Lake | — | 3.6 µg/L | 1.4 µg/L | 3.5 m | 2023 |
| Fjarasjo Lake | — | 7.1 µg/L | 2.8 µg/L | 3.5 m | 2023 |
| Stora Skarsjon | — | 7.4 µg/L | 3.7 µg/L | 3.5 m | 2023 |
| Limmingsjon | — | 4.3 µg/L | 2.9 µg/L | 3.4 m | 2023 |
Showing 20 of 55 named lakes. Open a county or place page for the rest.
Frequently asked questions
- Which lakes in Sweden are the clearest?
- 55 named lakes in Sweden 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.
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Named lakes and official measurements
Directory of official lake water quality
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