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LakeQuality

Iisvesi

Rautalampi, FinlandView mapDirections

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

Clarity
2.2 m
Clearer than most
Secchi · sampled 2025
Phosphorus
9.1 µg/L
Less phosphorus than most
Measured by Syke
Chlorophyll-a
5.9 µg/L
Typical for Finland
Measured by Syke
Max depth
38 m
Bathymetric survey
  • 125 ft max depth
  • Limited data

Iisvesi in Rautalampi, Finland has official water-quality measurements, shown as reported. Water clarity: 2.2 m visibility. Phosphorus: 9.1 µg/L. Chlorophyll-a (algae): 5.9 µg/L. Maximum depth: 124.7 ft.

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How Iisvesi is classified

Iisvesi 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.

Iisvesi is a lake in Rautalampi County, Finland with a maximum depth of 125 feet.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2025-10-23. Methodology: how these readings are compared.

What Iisvesi is good for

From access and monitoring records, not editorial picks.

  • Deep water124.7 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 Iisvesi 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 Iisvesi

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

Moderate clarity, visible to about 7.2 ft. Phosphorus 9.1 µg/L. Chlorophyll-a 5.9 µg/L. TSI 44.

Water quality readings
MeasureReadingWhere it sits
Water clarity (Secchi depth)2.2mMeasured, not scored

How deep a black-and-white disk stays visible from the surface. Higher is clearer.

Total phosphorus9.1µg/LMeasured, not scored

The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.

Chlorophyll-a (algae)5.9µg/LMeasured, 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.44Mesotrophic
OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Iisvesi

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

Lake Details

Max depth

38 m

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Fishing Iisvesi

Frequently asked questions about Iisvesi

Where is Iisvesi?

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

What is the water quality of Iisvesi?

Iisvesi in Rautalampi, Finland has official water-quality measurements, shown as reported. Water clarity: 2.2 m visibility. Phosphorus: 9.1 µg/L. Chlorophyll-a (algae): 5.9 µg/L. Maximum depth: 124.7 ft.

Measurements on this page ↑

Is Iisvesi safe to swim in?

Iisvesi 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.

Swimming on this page ↑

How deep is Iisvesi?

Iisvesi has a maximum depth of 124.7 feet.

Where this data comes from

910 measurements from 22 monitoring stations, 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-vesla910 samples · 2016–2025

Analytical methods

  • SYKE VESLA
Monitoring station identifiers (22)
  • 20622
  • 20738
  • 42015
  • 20765
  • 20742
  • 63038
  • 42014
  • 53856
  • 52891
  • 20705
  • 49374
  • 57189
  • 82703
  • 20528
  • 82704
  • 20689
  • 42189
  • 47787
  • 89633
  • 20756
  • 20751
  • 83153

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