Where is Toplanen Lake?

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

Is Toplanen Lake safe to swim in?

Toplanen 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 Toplanen Lake?

Toplanen Lake has a maximum depth of 89.6 feet.

Toplanen Lake

Mikkeli, FinlandView map Directions

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

Clarity

2.5 m

Clearer than most

Secchi · sampled 2022

Phosphorus

7.3 µg/L

Less phosphorus than most

Measured by Syke

Chlorophyll-a

4.8 µg/L

Typical for Finland

Measured by Syke

Max depth

27.3 m

Bathymetric survey

90 ft max depth
Limited data

See the measurements Directions Where to stay

Toplanen Lake in Mikkeli, Finland has official water-quality measurements, shown as reported. Water clarity: 2.5 m visibility. Phosphorus: 7.3 µg/L. Chlorophyll-a (algae): 4.8 µg/L. Maximum depth: 89.6 ft.

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How Toplanen Lake is classified

Toplanen 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.

Toplanen Lake is a lake in Mikkeli County, Finland with a maximum depth of 90 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2022-11-01. Methodology: how these readings are compared.

What Toplanen Lake is good for

From access and monitoring records, not editorial picks.

Deep water89.6 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 Toplanen 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 Toplanen Lake

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

Moderate clarity, visible to about 8 ft. Phosphorus 7.3 µg/L. Chlorophyll-a 4.8 µg/L. TSI 42.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	2.45m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	7.3µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	4.8µg/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.	42	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Toplanen Lake

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

Lake Details

Max depth

27.3 m

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Stays near Toplanen Lake

Compare lakeside cabins, hotels, and vacation rentals near Toplanen Lake in Mikkeli, Finland — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

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Fishing Toplanen Lake

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

Frequently asked questions about Toplanen Lake

Where is Toplanen Lake?: Toplanen Lake is a lake in Mikkeli, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Toplanen Lake?: Toplanen Lake in Mikkeli, Finland has official water-quality measurements, shown as reported. Water clarity: 2.5 m visibility. Phosphorus: 7.3 µg/L. Chlorophyll-a (algae): 4.8 µg/L. Maximum depth: 89.6 ft.
Is Toplanen Lake safe to swim in?: Toplanen 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 Toplanen Lake?: Toplanen Lake has a maximum depth of 89.6 feet.

Explore Toplanen Lake across LakeQuality

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Where this data comes from

13 measurements from 1 monitoring station, 2016–2022. 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-vesla13 samples · 2016–2022

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

13581

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