Where is Vahanka Lake?

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

Is Vahanka Lake safe to swim in?

Vahanka 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 Vahanka Lake?

Vahanka Lake has a maximum depth of 22 feet.

Vahanka Lake

Karstula, FinlandView map Directions

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

Clarity

0.7 m

Murkier than most

Secchi · sampled 2026

Phosphorus

32 µg/L

More phosphorus than most

Measured by Syke

Chlorophyll-a

17.5 µg/L

More algae than most

Measured by Syke

Max depth

6.7 m

Bathymetric survey

22 ft max depth
Limited data

See the measurements Directions Where to stay

Vahanka Lake in Karstula, Finland has official water-quality measurements, shown as reported. Water clarity: 0.7 m visibility. Phosphorus: 32 µg/L. Chlorophyll-a (algae): 17.5 µg/L. Maximum depth: 22 ft.

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How Vahanka Lake is classified

Vahanka 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.

Vahanka Lake is a lake in Karstula County, Finland with a maximum depth of 22 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2026-02-19. Methodology: how these readings are compared.

Swimming conditions

No reading

Limited data

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

Whether Vahanka 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 Vahanka Lake

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

Very murky, less than 2.3 ft of visibility. Phosphorus 32 µg/L. Chlorophyll-a 17.5 µg/L. TSI 59.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	0.7m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	32µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	17.5µg/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.	59	Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Vahanka Lake

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

Lake Details

Max depth

6.7 m

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Stays near Vahanka Lake

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Fishing Vahanka Lake

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

Frequently asked questions about Vahanka Lake

Where is Vahanka Lake?: Vahanka Lake is a lake in Karstula, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Vahanka Lake?: Vahanka Lake in Karstula, Finland has official water-quality measurements, shown as reported. Water clarity: 0.7 m visibility. Phosphorus: 32 µg/L. Chlorophyll-a (algae): 17.5 µg/L. Maximum depth: 22 ft.
Is Vahanka Lake safe to swim in?: Vahanka 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 Vahanka Lake?: Vahanka Lake has a maximum depth of 22 feet.

Explore Vahanka Lake across LakeQuality

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Where this data comes from

52 measurements from 1 monitoring station, 2016–2026. 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-vesla52 samples · 2016–2026

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

69888

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