Where is Haajaistenjärvi?

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

Is Haajaistenjärvi safe to swim in?

Haajaistenjärvi 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 Haajaistenjärvi?

Haajaistenjärvi has a maximum depth of 102 feet.

Haajaistenjärvi

Sonkajärvi, FinlandView map Directions

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

Clarity

1 m

Typical for Finland

Secchi · sampled 2023

Phosphorus

15 µg/L

Typical for Finland

Measured by Syke

Chlorophyll-a

3 µg/L

Less algae than most

Measured by Syke

Max depth

31.1 m

Bathymetric survey

102 ft max depth
Limited data

See the measurements Directions Where to stay

Haajaistenjärvi in Sonkajärvi, Finland has official water-quality measurements, shown as reported. Water clarity: 1 m visibility. Phosphorus: 15 µg/L. Chlorophyll-a (algae): 3 µg/L. Maximum depth: 102 ft.

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How Haajaistenjärvi is classified

Haajaistenjärvi 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.

Haajaistenjärvi is a lake in Sonkajärvi County, Finland with a maximum depth of 102 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2023-07-19. Methodology: how these readings are compared.

What Haajaistenjärvi is good for

From access and monitoring records, not editorial picks.

Deep water102 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 Haajaistenjärvi 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 Haajaistenjärvi

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

Very murky, less than 3.3 ft of visibility. Phosphorus 15 µg/L. Chlorophyll-a 3 µg/L. TSI 48.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	1m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	15µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	3µg/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.	48	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Haajaistenjärvi

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

Lake Details

Max depth

31.1 m

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Stays near Haajaistenjärvi

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Fishing Haajaistenjärvi

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

Frequently asked questions about Haajaistenjärvi

Where is Haajaistenjärvi?: Haajaistenjärvi is a lake in Sonkajärvi, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Haajaistenjärvi?: Haajaistenjärvi in Sonkajärvi, Finland has official water-quality measurements, shown as reported. Water clarity: 1 m visibility. Phosphorus: 15 µg/L. Chlorophyll-a (algae): 3 µg/L. Maximum depth: 102 ft.
Is Haajaistenjärvi safe to swim in?: Haajaistenjärvi 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 Haajaistenjärvi?: Haajaistenjärvi has a maximum depth of 102 feet.

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Where this data comes from

33 measurements from 2 monitoring stations, 2016–2023. 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-vesla33 samples · 2016–2023

Analytical methods

SYKE VESLA

Monitoring station identifiers (2)

19237
19222

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