Where is Ylimmäinen Lake?

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

Is Ylimmäinen Lake safe to swim in?

Ylimmäinen 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 Ylimmäinen Lake?

Ylimmäinen Lake has a maximum depth of 88.6 feet.

Ylimmäinen Lake

Heinola, FinlandView map Directions

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

Clarity

2.6 m

Clearer than most

Secchi · sampled 2021

Phosphorus

8.2 µg/L

Less phosphorus than most

Measured by Syke

Chlorophyll-a

3.8 µg/L

Less algae than most

Measured by Syke

Max depth

27 m

Bathymetric survey

89 ft max depth
Limited data

See the measurements Directions Where to stay

Ylimmäinen Lake in Heinola, Finland has official water-quality measurements, shown as reported. Water clarity: 2.6 m visibility. Phosphorus: 8.2 µg/L. Chlorophyll-a (algae): 3.8 µg/L. Maximum depth: 88.6 ft.

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How Ylimmäinen Lake is classified

Ylimmäinen 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.

Ylimmäinen Lake is a lake in Heinola County, Finland with a maximum depth of 89 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2021-08-16. Methodology: how these readings are compared.

What Ylimmäinen Lake is good for

From access and monitoring records, not editorial picks.

Deep water88.6 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 Ylimmäinen 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 Ylimmäinen Lake

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

Moderate clarity, visible to about 8.4 ft. Phosphorus 8.2 µg/L. Chlorophyll-a 3.8 µg/L. TSI 42.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	2.55m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	8.2µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	3.8µg/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 Ylimmäinen Lake

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

Lake Details

Max depth

27 m

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Stays near Ylimmäinen Lake

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Fishing Ylimmäinen Lake

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

Frequently asked questions about Ylimmäinen Lake

Where is Ylimmäinen Lake?: Ylimmäinen Lake is a lake in Heinola, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Ylimmäinen Lake?: Ylimmäinen Lake in Heinola, Finland has official water-quality measurements, shown as reported. Water clarity: 2.6 m visibility. Phosphorus: 8.2 µg/L. Chlorophyll-a (algae): 3.8 µg/L. Maximum depth: 88.6 ft.
Is Ylimmäinen Lake safe to swim in?: Ylimmäinen 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 Ylimmäinen Lake?: Ylimmäinen Lake has a maximum depth of 88.6 feet.

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Where this data comes from

11 measurements from 2 monitoring stations, 2020–2021. 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-vesla11 samples · 2020–2021

Analytical methods

SYKE VESLA

Monitoring station identifiers (2)

68748
14512

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