Where is Iso-Riutta Lake?

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

Is Iso-Riutta Lake safe to swim in?

Iso-Riutta 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-Riutta Lake?

The available depth estimate for Iso-Riutta Lake is shallower than its measured water clarity, which cannot be right, so no depth is shown.

Iso-Riutta Lake

Lempäälä, FinlandView map Directions

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

Clarity

8 m

Clearer than most

Secchi · sampled 2020

Phosphorus

11.5 µg/L

Typical for Finland

Measured by Syke

Chlorophyll-a

6.7 µg/L

Typical for Finland

Measured by Syke

Limited data

See the measurements Directions Where to stay

Iso-Riutta Lake in Lempäälä, Finland has official water-quality measurements, shown as reported. Water clarity: 8 m visibility. Phosphorus: 11.5 µg/L. Chlorophyll-a (algae): 6.7 µg/L.

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How Iso-Riutta Lake is classified

Iso-Riutta 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-Riutta Lake is a lake in Lempäälä County, Finland.

Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2020-09-10. Methodology: how these readings are compared.

What Iso-Riutta Lake is good for

From access and monitoring records, not editorial picks.

Clear water26.1 ft of visibility

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Iso-Riutta 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.

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Water quality measurements for Iso-Riutta Lake

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

Crystal clear, you can see 26.1 ft down. Phosphorus 11.5 µg/L. Chlorophyll-a 6.7 µg/L. TSI 40.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	7.95m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	11.5µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	6.7µg/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.	40	Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Low nutrients, clear water. No reading is a swimming clearance.

Ask about Iso-Riutta Lake

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

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Stays near Iso-Riutta Lake

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Fishing Iso-Riutta Lake

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

Frequently asked questions about Iso-Riutta Lake

Where is Iso-Riutta Lake?: Iso-Riutta Lake is a lake in Lempäälä, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Iso-Riutta Lake?: Iso-Riutta Lake in Lempäälä, Finland has official water-quality measurements, shown as reported. Water clarity: 8 m visibility. Phosphorus: 11.5 µg/L. Chlorophyll-a (algae): 6.7 µg/L.
Is Iso-Riutta Lake safe to swim in?: Iso-Riutta 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-Riutta Lake?: The available depth estimate for Iso-Riutta Lake is shallower than its measured water clarity, which cannot be right, so no depth is shown.

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Where this data comes from

5 measurements from 1 monitoring station, 2020. 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-vesla5 samples · 2020

Analytical methods

SYKE VESLA

Monitoring station identifiers (1)

50748

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