Seinäjärvi
Virrat, FinlandView mapDirections
Syke publishes the water-quality measurements for Seinäjärvi. Here is what has been measured.
- 11 ft max depth
- Limited data
Seinäjärvi in Virrat, Finland has official water-quality measurements, shown as reported. Water clarity: 1 m visibility. Phosphorus: 23.5 µg/L. Chlorophyll-a (algae): 11 µg/L. Maximum depth: 10.8 ft.
How Seinäjärvi is classified
Seinäjärvi 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.
Seinäjärvi is a lake in Virrat County, Finland with a maximum depth of 11 feet.
Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2026-03-10. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Seinäjärvi 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.
Water quality measurements for Seinäjärvi
These are the measurements Syke publishes for Seinäjärvi. More on the source.
Very murky, less than 3.3 ft of visibility. Phosphorus 23.5 µg/L. Chlorophyll-a 11 µg/L. TSI 55.
| 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 | 23.5µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 11µg/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. | 55 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
3.3 m
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Frequently asked questions about Seinäjärvi
Where is Seinäjärvi?
- Seinäjärvi is a lake in Virrat, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Seinäjärvi?
- Seinäjärvi in Virrat, Finland has official water-quality measurements, shown as reported. Water clarity: 1 m visibility. Phosphorus: 23.5 µg/L. Chlorophyll-a (algae): 11 µg/L. Maximum depth: 10.8 ft.
Is Seinäjärvi safe to swim in?
- Seinäjärvi 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 Seinäjärvi?
- Seinäjärvi has a maximum depth of 10.8 feet.
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Where this data comes from
53 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 Centres
syke-vesla53 samples · 2016–2026
Analytical methods
- SYKE VESLA
Monitoring station identifiers (2)
5141064150
Authority classifications are shown as the authority published them. See where the data comes from and data sources.