Kosjärvi
Kouvola, FinlandView mapDirections
Syke publishes the water-quality measurements for Kosjärvi. Here is what has been measured.
- 3 ft max depth
- Limited data
Kosjärvi in Kouvola, Finland has official water-quality measurements, shown as reported. Phosphorus: 32.5 µg/L. Maximum depth: 3.3 ft.
How Kosjärvi is classified
Kosjärvi 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 phosphorus, but not water clarity 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.
Kosjärvi is a lake in Kouvola County, Finland with a maximum depth of 3 feet.
Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2025-03-20. 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 Kosjärvi 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 Kosjärvi
These are the measurements Syke publishes for Kosjärvi. More on the source.
No clarity data. Phosphorus 32.5 µg/L. TSI 54.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 32.5µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | No reading 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. | 54 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Kosjärvi
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
1 m
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Frequently asked questions about Kosjärvi
Where is Kosjärvi?
- Kosjärvi is a lake in Kouvola, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Kosjärvi?
- Kosjärvi in Kouvola, Finland has official water-quality measurements, shown as reported. Phosphorus: 32.5 µg/L. Maximum depth: 3.3 ft.
Is Kosjärvi safe to swim in?
- Kosjärvi 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 Kosjärvi?
- Kosjärvi has a maximum depth of 3.3 feet.
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Where this data comes from
2 measurements from 1 monitoring station, 2024–2025. Retrieved from Syke VESLA (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Finnish Environment Institute (Syke) and ELY Centres
syke-vesla2 samples · 2024–2025
Analytical methods
- SYKE VESLA
Monitoring station identifiers (1)
11487
Authority classifications are shown as the authority published them. See where the data comes from and data sources.