Where is Kermajärvi?

Kermajärvi is a lake in Heinävesi, Finland. This page reports official water-quality measurements, shown as reported.

Is Kermajärvi safe to swim in?

Kermajärvi 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 Kermajärvi?

Kermajärvi has a maximum depth of 187 feet.

Kermajärvi

Heinävesi, FinlandView map Directions

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

Clarity

3.1 m

Clearer than most

Secchi · sampled 2026

Phosphorus

7 µg/L

Less phosphorus than most

Measured by Syke

Chlorophyll-a

4.9 µg/L

Typical for Finland

Measured by Syke

Max depth

57 m

Bathymetric survey

187 ft max depth
Limited data

See the measurements Directions Where to stay

Kermajärvi in Heinävesi, Finland has official water-quality measurements, shown as reported. Water clarity: 3.1 m visibility. Phosphorus: 7 µg/L. Chlorophyll-a (algae): 4.9 µg/L. Maximum depth: 187 ft.

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How Kermajärvi is classified

Kermajärvi 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.

Kermajärvi is a lake in Heinävesi County, Finland with a maximum depth of 187 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2026-06-24. Methodology: how these readings are compared.

What Kermajärvi is good for

From access and monitoring records, not editorial picks.

Clear water10.2 ft of visibility
Deep water187 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 Kermajärvi 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 Kermajärvi

These are the measurements Syke publishes for Kermajärvi. More on the source.

Good clarity, visible to about 10.2 ft. Phosphorus 7 µg/L. Chlorophyll-a 4.9 µg/L. TSI 41.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	3.1m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	7µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	4.9µg/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.	41	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Kermajärvi

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

Lake Details

Max depth

57 m

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Stays near Kermajärvi

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Fishing Kermajärvi

→ Kermajärvi fishing regulations (limits, seasons, special rules)

Frequently asked questions about Kermajärvi

Where is Kermajärvi?: Kermajärvi is a lake in Heinävesi, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Kermajärvi?: Kermajärvi in Heinävesi, Finland has official water-quality measurements, shown as reported. Water clarity: 3.1 m visibility. Phosphorus: 7 µg/L. Chlorophyll-a (algae): 4.9 µg/L. Maximum depth: 187 ft.
Is Kermajärvi safe to swim in?: Kermajärvi 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 Kermajärvi?: Kermajärvi has a maximum depth of 187 feet.

Explore Kermajärvi across LakeQuality

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Where this data comes from

44 measurements from 3 monitoring stations, 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-vesla44 samples · 2016–2026

Analytical methods

SYKE VESLA

Monitoring station identifiers (3)

82712
62741
14350

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