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

Is Molnträsk safe to swim in?

Molnträsk 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 Molnträsk?

Molnträsk has a maximum depth of 21.3 feet.

Molnträsk

Kirkkonummi, FinlandView map Directions

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

Clarity

0.7 m

Murkier than most

Secchi · sampled 2026

Phosphorus

36 µg/L

More phosphorus than most

Measured by Syke

Chlorophyll-a

20 µg/L

More algae than most

Measured by Syke

Max depth

6.5 m

Bathymetric survey

21 ft max depth
Limited data

See the measurements Directions Where to stay

Molnträsk in Kirkkonummi, Finland has official water-quality measurements, shown as reported. Water clarity: 0.7 m visibility. Phosphorus: 36 µg/L. Chlorophyll-a (algae): 20 µg/L. Maximum depth: 21.3 ft.

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How Molnträsk is classified

Molnträsk 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.

Molnträsk is a lake in Kirkkonummi County, Finland with a maximum depth of 21 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2026-02-24. 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 Molnträsk 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 Molnträsk

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

Very murky, less than 2.3 ft of visibility. Phosphorus 36 µg/L. Chlorophyll-a 20 µg/L. TSI 60.

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	36µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	20µg/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.	60	Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Molnträsk

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

Lake Details

Max depth

6.5 m

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Fishing Molnträsk

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

Frequently asked questions about Molnträsk

Where is Molnträsk?: Molnträsk is a lake in Kirkkonummi, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Molnträsk?: Molnträsk in Kirkkonummi, Finland has official water-quality measurements, shown as reported. Water clarity: 0.7 m visibility. Phosphorus: 36 µg/L. Chlorophyll-a (algae): 20 µg/L. Maximum depth: 21.3 ft.
Is Molnträsk safe to swim in?: Molnträsk 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 Molnträsk?: Molnträsk has a maximum depth of 21.3 feet.

Explore Molnträsk across LakeQuality

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Where this data comes from

29 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-vesla29 samples · 2016–2026

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

53078

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