Where is Iso Kuopusjärvi?

Iso Kuopusjärvi is a lake in Pudasjärvi, Finland. This page reports official water-quality measurements, shown as reported.

Is Iso Kuopusjärvi safe to swim in?

Iso Kuopusjärvi 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 Iso Kuopusjärvi?

Iso Kuopusjärvi has a maximum depth of 63 feet.

Iso Kuopusjärvi

Pudasjärvi, FinlandView map Directions

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

Clarity

3 m

Clearer than most

Secchi · sampled 2026

Phosphorus

7.7 µg/L

Less phosphorus than most

Measured by Syke

Chlorophyll-a

4.3 µg/L

Less algae than most

Measured by Syke

Max depth

19.2 m

Bathymetric survey

63 ft max depth
Limited data

See the measurements Directions Where to stay

Iso Kuopusjärvi in Pudasjärvi, Finland has official water-quality measurements, shown as reported. Water clarity: 3 m visibility. Phosphorus: 7.7 µg/L. Chlorophyll-a (algae): 4.3 µg/L. Maximum depth: 63 ft.

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How Iso Kuopusjärvi is classified

Iso Kuopusjärvi 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.

Iso Kuopusjärvi is a lake in Pudasjärvi County, Finland with a maximum depth of 63 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2026-07-07. Methodology: how these readings are compared.

What Iso Kuopusjärvi is good for

From access and monitoring records, not editorial picks.

Clear water9.8 ft of visibility
Deep water63 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 Iso Kuopusjärvi 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 Iso Kuopusjärvi

These are the measurements Syke publishes for Iso Kuopusjärvi. More on the source.

Moderate clarity, visible to about 9.8 ft. Phosphorus 7.7 µg/L. Chlorophyll-a 4.3 µg/L. TSI 41.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	3m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	7.7µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	4.3µg/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.	41	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Iso Kuopusjärvi

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

Lake Details

Max depth

19.2 m

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Stays near Iso Kuopusjärvi

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Fishing Iso Kuopusjärvi

→ Iso Kuopusjärvi fishing regulations (limits, seasons, special rules)

Frequently asked questions about Iso Kuopusjärvi

Where is Iso Kuopusjärvi?: Iso Kuopusjärvi is a lake in Pudasjärvi, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Iso Kuopusjärvi?: Iso Kuopusjärvi in Pudasjärvi, Finland has official water-quality measurements, shown as reported. Water clarity: 3 m visibility. Phosphorus: 7.7 µg/L. Chlorophyll-a (algae): 4.3 µg/L. Maximum depth: 63 ft.
Is Iso Kuopusjärvi safe to swim in?: Iso Kuopusjärvi 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 Iso Kuopusjärvi?: Iso Kuopusjärvi has a maximum depth of 63 feet.

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Where this data comes from

15 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-vesla15 samples · 2020–2026

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

29210

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