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

Is Aapajärvi safe to swim in?

Aapajärvi 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 Aapajärvi?

Aapajärvi has a maximum depth of 7.5 feet.

Aapajärvi

Tornio, FinlandView map Directions

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

Clarity

0.8 m

Murkier than most

Secchi · sampled 2025

Phosphorus

22 µg/L

Typical for Finland

Measured by Syke

Chlorophyll-a

6.2 µg/L

Typical for Finland

Measured by Syke

Max depth

2.3 m

Bathymetric survey

8 ft max depth
Limited data

See the measurements Directions Where to stay

Aapajärvi in Tornio, Finland has official water-quality measurements, shown as reported. Water clarity: 0.8 m visibility. Phosphorus: 22 µg/L. Chlorophyll-a (algae): 6.2 µg/L. Maximum depth: 7.5 ft.

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How Aapajärvi is classified

Aapajärvi 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.

Aapajärvi is a lake in Tornio County, Finland with a maximum depth of 8 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2025-09-16. 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 Aapajärvi 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 Aapajärvi

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

Very murky, less than 2.5 ft of visibility. Phosphorus 22 µg/L. Chlorophyll-a 6.2 µg/L. TSI 54.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	0.75m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	22µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	6.2µg/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.	54	Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Aapajärvi

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

Lake Details

Max depth

2.3 m

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Stays near Aapajärvi

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Fishing Aapajärvi

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

Frequently asked questions about Aapajärvi

Where is Aapajärvi?: Aapajärvi is a lake in Tornio, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Aapajärvi?: Aapajärvi in Tornio, Finland has official water-quality measurements, shown as reported. Water clarity: 0.8 m visibility. Phosphorus: 22 µg/L. Chlorophyll-a (algae): 6.2 µg/L. Maximum depth: 7.5 ft.
Is Aapajärvi safe to swim in?: Aapajärvi 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 Aapajärvi?: Aapajärvi has a maximum depth of 7.5 feet.

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Where this data comes from

40 measurements from 1 monitoring station, 2016–2025. 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-vesla40 samples · 2016–2025

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

53480

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