Märkjärvi
Kouvola, FinlandView mapDirections
Syke publishes the water-quality measurements for Märkjärvi. Here is what has been measured.
- 8 ft max depth
- Limited data
Märkjärvi in Kouvola, Finland has official water-quality measurements, shown as reported. Water clarity: 1 m visibility. Phosphorus: 11 µg/L. Chlorophyll-a (algae): 5.5 µg/L. Maximum depth: 8.2 ft.
How Märkjärvi is classified
Märkjärvi 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.
Märkjärvi is a lake in Kouvola County, Finland with a maximum depth of 8 feet.
Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2024-08-05. 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 Märkjärvi 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 Märkjärvi
These are the measurements Syke publishes for Märkjärvi. More on the source.
Very murky, less than 3.1 ft of visibility. Phosphorus 11 µg/L. Chlorophyll-a 5.5 µg/L. TSI 49.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 0.95m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 11µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 5.5µg/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. | 49 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
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Lake Details
Max depth
2.5 m
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Frequently asked questions about Märkjärvi
Where is Märkjärvi?
- Märkjärvi is a lake in Kouvola, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Märkjärvi?
- Märkjärvi in Kouvola, Finland has official water-quality measurements, shown as reported. Water clarity: 1 m visibility. Phosphorus: 11 µg/L. Chlorophyll-a (algae): 5.5 µg/L. Maximum depth: 8.2 ft.
Is Märkjärvi safe to swim in?
- Märkjärvi 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 Märkjärvi?
- Märkjärvi has a maximum depth of 8.2 feet.
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Where this data comes from
16 measurements from 1 monitoring station, 2018–2024. 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-vesla16 samples · 2018–2024
Analytical methods
- SYKE VESLA
Monitoring station identifiers (1)
55816
Authority classifications are shown as the authority published them. See where the data comes from and data sources.