Where is Iso-Syvä Lake?

Iso-Syvä Lake is a lake in Pieksämäki, Finland. This page reports official water-quality measurements, shown as reported.

Is Iso-Syvä Lake safe to swim in?

Iso-Syvä 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 Iso-Syvä Lake?

Iso-Syvä Lake has a maximum depth of 14.8 feet.

Iso-Syvä Lake

Pieksämäki, FinlandView map Directions

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

Clarity

2.9 m

Clearer than most

Secchi · sampled 2019

Phosphorus

10.2 µg/L

Typical for Finland

Measured by Syke

Chlorophyll-a

9.7 µg/L

Typical for Finland

Measured by Syke

Max depth

4.5 m

Bathymetric survey

15 ft max depth
Limited data

See the measurements Directions Where to stay

Iso-Syvä Lake in Pieksämäki, Finland has official water-quality measurements, shown as reported. Water clarity: 2.9 m visibility. Phosphorus: 10.2 µg/L. Chlorophyll-a (algae): 9.7 µg/L. Maximum depth: 14.8 ft.

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How Iso-Syvä Lake is classified

Iso-Syvä 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.

Iso-Syvä Lake is a lake in Pieksämäki County, Finland with a maximum depth of 15 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2019-10-28. 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 Iso-Syvä 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 Iso-Syvä Lake

These are the measurements Syke publishes for Iso-Syvä Lake. More on the source.

Moderate clarity, visible to about 9.5 ft. Phosphorus 10.2 µg/L. Chlorophyll-a 9.7 µg/L. TSI 45.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	2.9m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	10.2µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	9.7µg/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.	45	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Iso-Syvä Lake

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

Lake Details

Max depth

4.5 m

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Fishing Iso-Syvä Lake

→ Iso-Syvä Lake fishing regulations (limits, seasons, special rules)

Frequently asked questions about Iso-Syvä Lake

Where is Iso-Syvä Lake?: Iso-Syvä Lake is a lake in Pieksämäki, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Iso-Syvä Lake?: Iso-Syvä Lake in Pieksämäki, Finland has official water-quality measurements, shown as reported. Water clarity: 2.9 m visibility. Phosphorus: 10.2 µg/L. Chlorophyll-a (algae): 9.7 µg/L. Maximum depth: 14.8 ft.
Is Iso-Syvä Lake safe to swim in?: Iso-Syvä 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 Iso-Syvä Lake?: Iso-Syvä Lake has a maximum depth of 14.8 feet.

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Where this data comes from

10 measurements from 1 monitoring station, 2019. 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-vesla10 samples · 2019

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

15438

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