Where is Rautajanlammi?

Rautajanlammi is a lake in Hyvinkää, Finland. This page reports official water-quality measurements, shown as reported.

Is Rautajanlammi safe to swim in?

Rautajanlammi 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 Rautajanlammi?

Rautajanlammi has a maximum depth of 11.5 feet.

Rautajanlammi

Hyvinkää, FinlandView map Directions

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

Clarity

0.4 m

Murkier than most

Secchi · sampled 2018

Phosphorus

26.5 µg/L

Typical for Finland

Measured by Syke

Chlorophyll-a

22 µg/L

More algae than most

Measured by Syke

Max depth

3.5 m

Bathymetric survey

12 ft max depth
Limited data

See the measurements Directions Where to stay

Rautajanlammi in Hyvinkää, Finland has official water-quality measurements, shown as reported. Water clarity: 0.4 m visibility. Phosphorus: 26.5 µg/L. Chlorophyll-a (algae): 22 µg/L. Maximum depth: 11.5 ft.

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How Rautajanlammi is classified

Rautajanlammi 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.

Rautajanlammi is a lake in Hyvinkää County, Finland with a maximum depth of 12 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2018-08-07. 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 Rautajanlammi 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 Rautajanlammi

These are the measurements Syke publishes for Rautajanlammi. More on the source.

Very murky, less than 1.2 ft of visibility. Phosphorus 26.5 µg/L. Chlorophyll-a 22 µg/L. TSI 62.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	0.38m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	26.5µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	22µg/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.	62	Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Rautajanlammi

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

Lake Details

Max depth

3.5 m

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Fishing Rautajanlammi

→ Rautajanlammi fishing regulations (limits, seasons, special rules)

Frequently asked questions about Rautajanlammi

Where is Rautajanlammi?: Rautajanlammi is a lake in Hyvinkää, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Rautajanlammi?: Rautajanlammi in Hyvinkää, Finland has official water-quality measurements, shown as reported. Water clarity: 0.4 m visibility. Phosphorus: 26.5 µg/L. Chlorophyll-a (algae): 22 µg/L. Maximum depth: 11.5 ft.
Is Rautajanlammi safe to swim in?: Rautajanlammi 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 Rautajanlammi?: Rautajanlammi has a maximum depth of 11.5 feet.

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Where this data comes from

5 measurements from 1 monitoring station, 2018. 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-vesla5 samples · 2018

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

50792

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