Clearest lakes in Poland
Clearest lakes in Poland: 748 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 Poland
| Lake | Place | Total phosphorus | Chlorophyll-a | Secchi | Year |
|---|---|---|---|---|---|
| Białe Wigierskie | LW30622 | 25 µg/L | 2.8 µg/L | 8.2 m | 2025 |
| Piaszno | LW20312 | 16 µg/L | 4.0 µg/L | 6.9 m | 2024 |
| Budzisławskie | LW10398 | 36 µg/L | — | 6.5 m | 2026 |
| Jeleń | LW20991 | — | 4.7 µg/L | 6.3 m | 2026 |
| Lubikowskie | LW10332 | 16 µg/L | 3.7 µg/L | 6.3 m | 2025 |
| Ostrowite | LW20299 | 18 µg/L | 3.1 µg/L | 6.3 m | 2024 |
| Buszno | LW10380 | 19 µg/L | 1.9 µg/L | 6.0 m | 2025 |
| Hańcza | LW30614 | 29 µg/L | 3.0 µg/L | 6.0 m | 2025 |
| Białe Filipowskie | LW30583 | 57 µg/L | 3.9 µg/L | 5.5 m | 2024 |
| Durowo | LW10217 | 33 µg/L | — | 5.5 m | 2026 |
| Leleskie | LW30433 | — | — | 5.4 m | 2026 |
| Bobięcińskie Wielkie | LW20887 | 13 µg/L | 5.2 µg/L | 5.3 m | 2025 |
| Piaseczno | LW30692 | — | 2.4 µg/L | 5.3 m | 2026 |
| Trzebielsk | LW20315 | 18 µg/L | 6.0 µg/L | 5.3 m | 2025 |
| Lipczyno Wielkie | LW20282 | 32 µg/L | 6.9 µg/L | 5.2 m | 2024 |
| Długie Krasnopolskie | LW30640 | 47 µg/L | 3.9 µg/L | 5.2 m | 2024 |
| Płęsno | LW20360 | 32 µg/L | 5.2 µg/L | 5.2 m | 2025 |
| Piaseczno | LW10828 | 13 µg/L | 4.1 µg/L | 5.1 m | 2024 |
| Gorzyńskie | LW10315 | 37 µg/L | — | 5.0 m | 2026 |
| Białe | LW20010 | 25 µg/L | 3.6 µg/L | 5.0 m | 2026 |
Showing 20 of 748 named lakes. Open a county or place page for the rest.
Frequently asked questions
- Which lakes in Poland are the clearest?
- 748 named lakes in Poland 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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