Where is Kousanjärvi-Keskinen?

Kousanjärvi-Keskinen is a lake in Mäntyharju, Finland. This page reports official water-quality measurements, shown as reported.

Is Kousanjärvi-Keskinen safe to swim in?

Kousanjärvi-Keskinen 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 Kousanjärvi-Keskinen?

Kousanjärvi-Keskinen has a maximum depth of 52.5 feet.

Kousanjärvi-Keskinen

Mäntyharju, FinlandView map Directions

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

Clarity

4.1 m

Clearer than most

Secchi · sampled 2024

Phosphorus

4 µg/L

Less phosphorus than most

Measured by Syke

Chlorophyll-a

3 µg/L

Less algae than most

Measured by Syke

Max depth

16 m

Bathymetric survey

53 ft max depth
Limited data

See the measurements Directions Where to stay

Kousanjärvi-Keskinen in Mäntyharju, Finland has official water-quality measurements, shown as reported. Water clarity: 4.1 m visibility. Phosphorus: 4 µg/L. Chlorophyll-a (algae): 3 µg/L. Maximum depth: 52.5 ft.

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How Kousanjärvi-Keskinen is classified

Kousanjärvi-Keskinen 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.

Kousanjärvi-Keskinen is a lake in Mäntyharju County, Finland with a maximum depth of 53 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2024-08-07. Methodology: how these readings are compared.

What Kousanjärvi-Keskinen is good for

From access and monitoring records, not editorial picks.

Clear water13.5 ft of visibility
Deep water52.5 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 Kousanjärvi-Keskinen 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 Kousanjärvi-Keskinen

These are the measurements Syke publishes for Kousanjärvi-Keskinen. More on the source.

Good clarity, visible to about 13.5 ft. Phosphorus 4 µg/L. Chlorophyll-a 3 µg/L. TSI 35.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	4.1m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	4µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	3µg/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.	35	Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Low nutrients, clear water. No reading is a swimming clearance.

Ask about Kousanjärvi-Keskinen

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

Lake Details

Max depth

16 m

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Stays near Kousanjärvi-Keskinen

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Fishing Kousanjärvi-Keskinen

→ Kousanjärvi-Keskinen fishing regulations (limits, seasons, special rules)

Frequently asked questions about Kousanjärvi-Keskinen

Where is Kousanjärvi-Keskinen?: Kousanjärvi-Keskinen is a lake in Mäntyharju, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Kousanjärvi-Keskinen?: Kousanjärvi-Keskinen in Mäntyharju, Finland has official water-quality measurements, shown as reported. Water clarity: 4.1 m visibility. Phosphorus: 4 µg/L. Chlorophyll-a (algae): 3 µg/L. Maximum depth: 52.5 ft.
Is Kousanjärvi-Keskinen safe to swim in?: Kousanjärvi-Keskinen 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 Kousanjärvi-Keskinen?: Kousanjärvi-Keskinen has a maximum depth of 52.5 feet.

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Where this data comes from

3 measurements from 1 monitoring station, 2024. 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 · 2024

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

13665

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