Clearest lakes in Italy
Clearest lakes in Italy: 49 named lakes have an official Secchi depth. The 20 below are ranked by that reading, water clarity as the authority reports it.
Lake map
Map shows 20 lakes with coordinates
Highest Secchi readings in Italy
| Lake | Place | Total phosphorus | Chlorophyll-a | Secchi | Year |
|---|---|---|---|---|---|
| Lago di Truzzo | Sondrio | 4.0 µg/L | — | 20 m | 2018 |
| Lago di Garda | Verona | 8.0 µg/L | 2.2 µg/L | 8.1 m | 2025 |
| Lago di Palù | Sondrio | 8.0 µg/L | — | 8.0 m | 2021 |
| Lago di Montespluga | Sondrio | 5.0 µg/L | — | 6.5 m | 2021 |
| Lago Maggiore | Varese | 5.5 µg/L | 2.3 µg/L | 5.8 m | 2020 |
| Lago di Como | Lecco | 12 µg/L | — | 5.8 m | 2021 |
| Lago di Palabione | Sondrio | 8.0 µg/L | — | 5.7 m | 2019 |
| Lago di Garlate | Lecco | 13 µg/L | — | 5.5 m | 2021 |
| Lago del Gallo | Sondrio | 8.5 µg/L | — | 5.5 m | 2021 |
| Lago di Ghirla | Varese | 10 µg/L | — | 4.9 m | 2021 |
| Lago di Lugano | Varese | 13 µg/L | — | 4.5 m | 2021 |
| Lago di Idro | Brescia | 13 µg/L | — | 4.0 m | 2021 |
| Lago di Iseo | Brescia | 11 µg/L | — | 4.0 m | 2021 |
| Lago di Misurina | Belluno | 5.0 µg/L | 1.1 µg/L | 4.0 m | 2025 |
| Lago di Varese | Varese | 27 µg/L | — | 3.8 m | 2021 |
| Lago di Piano | Como | 15 µg/L | — | 3.5 m | 2021 |
| Lago di Lago | Treviso | 10 µg/L | 3.8 µg/L | 3.4 m | 2025 |
| Lago di Corlo | Belluno | 9.0 µg/L | 5.0 µg/L | 3.4 m | 2025 |
| Lago del Mis | Belluno | 6.0 µg/L | 1.5 µg/L | 3.3 m | 2025 |
| Lago di Segrino | Como | 10 µg/L | — | 3.3 m | 2021 |
Showing 20 of 49 named lakes. Open a county or place page for the rest.
Frequently asked questions
- Which lakes in Italy are the clearest?
- 49 named lakes in Italy have an official Secchi depth. This page ranks the 20 deepest readings. Secchi is a clarity measurement, not a swim-safety class.
- 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 measure. 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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Where to stay near Italy
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