Where is Kolu-Meronen Lake?

Kolu-Meronen Lake is a lake in Petäjävesi, Finland. This page reports official water-quality measurements, shown as reported.

Is Kolu-Meronen Lake safe to swim in?

Kolu-Meronen 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 Kolu-Meronen Lake?

Kolu-Meronen Lake has a maximum depth of 7.5 feet.

Kolu-Meronen Lake

Petäjävesi, FinlandView map Directions

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

Clarity

0.6 m

Murkier than most

Secchi · sampled 2026

Phosphorus

50 µg/L

More phosphorus than most

Measured by Syke

Chlorophyll-a

26.5 µg/L

More algae than most

Measured by Syke

Max depth

2.3 m

Bathymetric survey

8 ft max depth
Limited data

See the measurements Directions Where to stay

Kolu-Meronen Lake in Petäjävesi, Finland has official water-quality measurements, shown as reported. Water clarity: 0.6 m visibility. Phosphorus: 50 µg/L. Chlorophyll-a (algae): 26.5 µg/L. Maximum depth: 7.5 ft.

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How Kolu-Meronen Lake is classified

Kolu-Meronen 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.

Kolu-Meronen Lake is a lake in Petäjävesi County, Finland with a maximum depth of 8 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 Kolu-Meronen 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 Kolu-Meronen Lake

These are the measurements Syke publishes for Kolu-Meronen Lake. More on the source.

Very murky, less than 2 ft of visibility. Phosphorus 50 µg/L. Chlorophyll-a 26.5 µg/L. TSI 64.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	0.6m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	50µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	26.5µg/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.	64	Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Kolu-Meronen Lake

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

Lake Details

Max depth

2.3 m

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Stays near Kolu-Meronen Lake

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Fishing Kolu-Meronen Lake

→ Kolu-Meronen Lake fishing regulations (limits, seasons, special rules)

Frequently asked questions about Kolu-Meronen Lake

Where is Kolu-Meronen Lake?: Kolu-Meronen Lake is a lake in Petäjävesi, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Kolu-Meronen Lake?: Kolu-Meronen Lake in Petäjävesi, Finland has official water-quality measurements, shown as reported. Water clarity: 0.6 m visibility. Phosphorus: 50 µg/L. Chlorophyll-a (algae): 26.5 µg/L. Maximum depth: 7.5 ft.
Is Kolu-Meronen Lake safe to swim in?: Kolu-Meronen 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 Kolu-Meronen Lake?: Kolu-Meronen Lake has a maximum depth of 7.5 feet.

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Where this data comes from

51 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-vesla51 samples · 2016–2026

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

25802

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