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.

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 Sweden, 55 Named Lakes

Lake map

Map shows 20 lakes with coordinates

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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.
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.