Clearest lakes in Estonia
Clearest lakes in Estonia: 95 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 Estonia
| Lake | Place | Total phosphorus | Chlorophyll-a | Secchi | Year |
|---|---|---|---|---|---|
| Rummu Järv | Harju | 11 µg/L | 1.0 µg/L | 8.8 m | 2024 |
| Sinijärv | Lääne-Viru | 10 µg/L | 1.0 µg/L | 6.3 m | 2024 |
| Saadjärv | Tartu | 16 µg/L | 1.8 µg/L | 4.8 m | 2016 |
| Karujärv | Saare | 11 µg/L | 1.5 µg/L | 4.6 m | 2024 |
| Nõuni Järv | Valga | 22 µg/L | 3.6 µg/L | 4.2 m | 2021 |
| Valgõjärv | Põlva | 20 µg/L | 4.8 µg/L | 4.1 m | 2025 |
| Pikkjärv | Lääne-Viru | 26 µg/L | 7.3 µg/L | 3.5 m | 2025 |
| Männiku Järv | Harju | 20 µg/L | 3.6 µg/L | 3.0 m | 2024 |
| Paunküla Veehoidla | Harju | 25 µg/L | 6.6 µg/L | 3.0 m | 2021 |
| Ahnejärv | Ida-Viru | 13 µg/L | 4.1 µg/L | 3.0 m | 2025 |
| Kuremaa Järv | Jõgeva | 27 µg/L | 4.4 µg/L | 3.0 m | 2024 |
| Martiska Järv | Ida-Viru | 23 µg/L | 12 µg/L | 3.0 m | 2025 |
| Suurjärv | Võru | 20 µg/L | 3.4 µg/L | 2.9 m | 2025 |
| Soitsjärv | Tartu | 23 µg/L | 9.0 µg/L | 2.8 m | 2016 |
| Pühajärv | Valga | 29 µg/L | 7.6 µg/L | 2.7 m | 2025 |
| Hino Järv | Võru | 21 µg/L | 7.1 µg/L | 2.5 m | 2023 |
| Raku Järv | Harju | 34 µg/L | 10 µg/L | 2.5 m | 2021 |
| Konsu Järv | Ida-Viru | 18 µg/L | 3.4 µg/L | 2.4 m | 2025 |
| Viljandi Järv | Viljandi | 32 µg/L | 11 µg/L | 2.2 m | 2023 |
| Lõõdla Järv | Võru | 29 µg/L | 13 µg/L | 2.1 m | 2023 |
Showing 20 of 95 named lakes. Open a county or place page for the rest.
Frequently asked questions
- Which lakes in Estonia are the clearest?
- 95 named lakes in Estonia 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
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