Where is Alaset Lake?

Alaset Lake is a lake in Rantasalmi, Finland. This page reports official water-quality measurements, shown as reported.

Is Alaset Lake safe to swim in?

Alaset Lake has official nutrient and clarity measurements, not a bacteria swim class and not a safety clearance. Algal blooms, currents, and depth are not covered. Always check local notices before swimming.

How deep is Alaset Lake?

Alaset Lake has a maximum depth of 37.7 feet.

Alaset Lake

Rantasalmi, FinlandView map Directions

Syke publishes the water-quality measurements for Alaset Lake. Here is what has been measured.

Clarity

4.3 m

Clearer than most

Secchi · sampled 2022

Phosphorus

6 µg/L

Less phosphorus than most

Measured by Syke

Chlorophyll-a

3.8 µg/L

Less algae than most

Measured by Syke

Max depth

11.5 m

Bathymetric survey

38 ft max depth
Limited data

See the measurements Directions Where to stay

Alaset Lake in Rantasalmi, Finland has official water-quality measurements, shown as reported. Water clarity: 4.3 m visibility. Phosphorus: 6 µg/L. Chlorophyll-a (algae): 3.8 µg/L. Maximum depth: 37.7 ft.

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How Alaset Lake is classified

Alaset Lake in Finland is published with the authority's own measurements and class. The measurements here are published by the agency that samples the lake, as reported. Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).

LakeQuality publishes no grade of its own beside it. Everything below thathas been measured is reported on this page.

Monitoring: the Finnish Environment Institute (Syke) and the ELY Centres.

Alaset Lake is a lake in Rantasalmi County, Finland with a maximum depth of 38 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2022-10-19. Methodology: how these readings are compared.

What Alaset Lake is good for

From access and monitoring records, not editorial picks.

Clear water14.1 ft of visibility
Deep water37.7 ft surveyed max depth

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Alaset Lake is safe to swim in today is a call for the Finnish Environment Institute (Syke) and the ELY Centres and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Alaset Lake

These are the measurements Syke publishes for Alaset Lake. More on the source.

Good clarity, visible to about 14.1 ft. Phosphorus 6 µg/L. Chlorophyll-a 3.8 µg/L. TSI 38.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	4.3m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	6µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	3.8µg/L	Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water.
Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a.	38	Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Low nutrients, clear water. No reading is a swimming clearance.

Ask about Alaset Lake

Answers come straight from the public measurements and survey records on this page.

Lake Details

Max depth

11.5 m

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Stays near Alaset Lake

Compare lakeside cabins, hotels, and vacation rentals near Alaset Lake in Rantasalmi, Finland — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

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Fishing Alaset Lake

→ Alaset Lake fishing regulations (limits, seasons, special rules)

Frequently asked questions about Alaset Lake

Where is Alaset Lake?: Alaset Lake is a lake in Rantasalmi, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Alaset Lake?: Alaset Lake in Rantasalmi, Finland has official water-quality measurements, shown as reported. Water clarity: 4.3 m visibility. Phosphorus: 6 µg/L. Chlorophyll-a (algae): 3.8 µg/L. Maximum depth: 37.7 ft.
Is Alaset Lake safe to swim in?: Alaset Lake has official nutrient and clarity measurements, not a bacteria swim class and not a safety clearance. Algal blooms, currents, and depth are not covered. Always check local notices before swimming.
How deep is Alaset Lake?: Alaset Lake has a maximum depth of 37.7 feet.

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Where this data comes from

14 measurements from 1 monitoring station, 2016–2022. Retrieved from Syke VESLA (not the EPA Water Quality Portal) on 2026-08-16.

Collected and reported by

Finnish Environment Institute (Syke) and ELY Centressyke-vesla14 samples · 2016–2022

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

13853

Authority classifications are shown as the authority published them. See where the data comes from and data sources.