Where is Tuhnajajärvi?

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

Is Tuhnajajärvi safe to swim in?

Tuhnajajärvi 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 Tuhnajajärvi?

Tuhnajajärvi has a maximum depth of 9.2 feet.

Tuhnajajärvi

Rovaniemi, FinlandView map Directions

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

Clarity

1.2 m

Typical for Finland

Secchi · sampled 2020

Phosphorus

30.5 µg/L

More phosphorus than most

Measured by Syke

Chlorophyll-a

14 µg/L

Typical for Finland

Measured by Syke

Max depth

2.8 m

Bathymetric survey

9 ft max depth
Limited data

See the measurements Directions Where to stay

Tuhnajajärvi in Rovaniemi, Finland has official water-quality measurements, shown as reported. Water clarity: 1.2 m visibility. Phosphorus: 30.5 µg/L. Chlorophyll-a (algae): 14 µg/L. Maximum depth: 9.2 ft.

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How Tuhnajajärvi is classified

Tuhnajajärvi 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.

Tuhnajajärvi is a lake in Rovaniemi County, Finland with a maximum depth of 9 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2020-09-23. 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 Tuhnajajärvi 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 Tuhnajajärvi

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

Murky, only visible to about 3.9 ft. Phosphorus 30.5 µg/L. Chlorophyll-a 14 µg/L. TSI 56.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	1.2m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	30.5µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	14µg/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.	56	Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Tuhnajajärvi

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

Lake Details

Max depth

2.8 m

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Fishing Tuhnajajärvi

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

Frequently asked questions about Tuhnajajärvi

Where is Tuhnajajärvi?: Tuhnajajärvi is a lake in Rovaniemi, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Tuhnajajärvi?: Tuhnajajärvi in Rovaniemi, Finland has official water-quality measurements, shown as reported. Water clarity: 1.2 m visibility. Phosphorus: 30.5 µg/L. Chlorophyll-a (algae): 14 µg/L. Maximum depth: 9.2 ft.
Is Tuhnajajärvi safe to swim in?: Tuhnajajärvi 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 Tuhnajajärvi?: Tuhnajajärvi has a maximum depth of 9.2 feet.

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Where this data comes from

11 measurements from 1 monitoring station, 2020. 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

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

37404

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