Where is Vistjärnen Lake?

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

Is Vistjärnen Lake safe to swim in?

Vistjärnen 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.

Vistjärnen Lake

Raasepori, FinlandView map Directions

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

Clarity

3 m

Clearer than most

Secchi · sampled 2020

Phosphorus

9 µg/L

Less phosphorus than most

Measured by Syke

Chlorophyll-a

6.1 µg/L

Typical for Finland

Measured by Syke

Limited data

See the measurements Directions Where to stay

Vistjärnen Lake in Raasepori, Finland has official water-quality measurements, shown as reported. Water clarity: 3 m visibility. Phosphorus: 9 µg/L. Chlorophyll-a (algae): 6.1 µg/L.

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How Vistjärnen Lake is classified

Vistjärnen 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.

Vistjärnen Lake is a lake in Raasepori County, Finland.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2020-10-14. Methodology: how these readings are compared.

What Vistjärnen Lake is good for

From access and monitoring records, not editorial picks.

Clear water9.8 ft of visibility

Swimming conditions

No reading

Limited data

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

Whether Vistjärnen 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 Vistjärnen Lake

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

Moderate clarity, visible to about 9.8 ft. Phosphorus 9 µg/L. Chlorophyll-a 6.1 µg/L. TSI 43.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	3m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	9µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	6.1µg/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.	43	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Vistjärnen Lake

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

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Stays near Vistjärnen Lake

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Fishing Vistjärnen Lake

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

Frequently asked questions about Vistjärnen Lake

Where is Vistjärnen Lake?: Vistjärnen Lake is a lake in Raasepori, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Vistjärnen Lake?: Vistjärnen Lake in Raasepori, Finland has official water-quality measurements, shown as reported. Water clarity: 3 m visibility. Phosphorus: 9 µg/L. Chlorophyll-a (algae): 6.1 µg/L.
Is Vistjärnen Lake safe to swim in?: Vistjärnen 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.

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Where this data comes from

3 measurements from 1 monitoring station, 2020. 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-vesla3 samples · 2020

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

89510

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