Where is Säyhtee Lake?

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

Is Säyhtee Lake safe to swim in?

Säyhtee 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 Säyhtee Lake?

Säyhtee Lake has a maximum depth of 39.4 feet.

Säyhtee Lake

Orimattila, FinlandView map Directions

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

Clarity

0.3 m

Murkier than most

Secchi · sampled 2026

Phosphorus

110 µg/L

More phosphorus than most

Measured by Syke

Chlorophyll-a

12.5 µg/L

Typical for Finland

Measured by Syke

Max depth

12 m

Bathymetric survey

39 ft max depth
Limited data

See the measurements Directions Where to stay

Säyhtee Lake in Orimattila, Finland has official water-quality measurements, shown as reported. Water clarity: 0.3 m visibility. Phosphorus: 110 µg/L. Chlorophyll-a (algae): 12.5 µg/L. Maximum depth: 39.4 ft.

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How Säyhtee Lake is classified

Säyhtee 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.

Säyhtee Lake is a lake in Orimattila County, Finland with a maximum depth of 39 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2026-06-25. Methodology: how these readings are compared.

What Säyhtee Lake is good for

From access and monitoring records, not editorial picks.

Deep water39.4 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 Säyhtee 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 Säyhtee Lake

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

Very murky, less than 1 ft of visibility. Phosphorus 110 µg/L. Chlorophyll-a 12.5 µg/L. TSI 68.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	0.3m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	110µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	12.5µg/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.	68	Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Säyhtee Lake

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

Lake Details

Max depth

12 m

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Stays near Säyhtee Lake

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Fishing Säyhtee Lake

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

Frequently asked questions about Säyhtee Lake

Where is Säyhtee Lake?: Säyhtee Lake is a lake in Orimattila, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Säyhtee Lake?: Säyhtee Lake in Orimattila, Finland has official water-quality measurements, shown as reported. Water clarity: 0.3 m visibility. Phosphorus: 110 µg/L. Chlorophyll-a (algae): 12.5 µg/L. Maximum depth: 39.4 ft.
Is Säyhtee Lake safe to swim in?: Säyhtee 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 Säyhtee Lake?: Säyhtee Lake has a maximum depth of 39.4 feet.

Explore Säyhtee Lake across LakeQuality

Lake Fishing Forecast

Species activity outlook by water temperature and season

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EU bathing ratings and named-lake measurements

Where this data comes from

22 measurements from 1 monitoring station, 2020–2026. 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-vesla22 samples · 2020–2026

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

304

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