Where is Iso-Kontunen Lake?

Iso-Kontunen Lake is a lake in Juva, Finland. This page reports official water-quality measurements, shown as reported.

Is Iso-Kontunen Lake safe to swim in?

Iso-Kontunen Lake 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-Kontunen Lake?

Iso-Kontunen Lake has a maximum depth of 19.7 feet.

Iso-Kontunen Lake

Juva, FinlandView map Directions

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

Clarity

0.6 m

Murkier than most

Secchi · sampled 2026

Phosphorus

33.5 µg/L

More phosphorus than most

Measured by Syke

Chlorophyll-a

17.5 µg/L

More algae than most

Measured by Syke

Max depth

6 m

Bathymetric survey

20 ft max depth
Limited data

See the measurements Directions Where to stay

Iso-Kontunen Lake in Juva, Finland has official water-quality measurements, shown as reported. Water clarity: 0.6 m visibility. Phosphorus: 33.5 µg/L. Chlorophyll-a (algae): 17.5 µg/L. Maximum depth: 19.7 ft.

Loading map…

How Iso-Kontunen Lake is classified

Iso-Kontunen Lake 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-Kontunen Lake is a lake in Juva County, Finland with a maximum depth of 20 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2026-08-06. 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 Iso-Kontunen Lake 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.

Get alerts for Iso-Kontunen Lake →

Water quality measurements for Iso-Kontunen Lake

These are the measurements Syke publishes for Iso-Kontunen Lake. More on the source.

Very murky, less than 2 ft of visibility. Phosphorus 33.5 µg/L. Chlorophyll-a 17.5 µg/L. TSI 60.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	0.6m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	33.5µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	17.5µg/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.	60	Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Iso-Kontunen Lake

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

Lake Details

Max depth

6 m

Stays via Stay22

Stays near Iso-Kontunen Lake

Compare lakeside cabins, hotels, and vacation rentals near Iso-Kontunen Lake in Juva, Finland — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

Top-rated places to stay near Iso-Kontunen Lake

Prices for Oct 2–4, 4 adults. Change dates on the map below.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Follow Iso-Kontunen Lake’s readings

Email me when new measurements post for this lake. Updates stay free.

Or email

Fishing Iso-Kontunen Lake

→ Iso-Kontunen Lake fishing regulations (limits, seasons, special rules)

Frequently asked questions about Iso-Kontunen Lake

Where is Iso-Kontunen Lake?: Iso-Kontunen Lake is a lake in Juva, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Iso-Kontunen Lake?: Iso-Kontunen Lake in Juva, Finland has official water-quality measurements, shown as reported. Water clarity: 0.6 m visibility. Phosphorus: 33.5 µg/L. Chlorophyll-a (algae): 17.5 µg/L. Maximum depth: 19.7 ft.
Is Iso-Kontunen Lake safe to swim in?: Iso-Kontunen Lake 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-Kontunen Lake?: Iso-Kontunen Lake has a maximum depth of 19.7 feet.

Explore Iso-Kontunen Lake across LakeQuality

Lake Fishing Forecast

Species activity outlook by water temperature and season

More lakes in Finland

Lakes in Finland

Official water quality for lakes in Finland

Lake water quality by country

EU bathing ratings and named-lake measurements

Where this data comes from

93 measurements from 2 monitoring stations, 2016–2026. 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-vesla93 samples · 2016–2026

Analytical methods

SYKE VESLA

Monitoring station identifiers (2)

13736
13730

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