Matjärvi
Hollola, FinlandView mapDirections
Syke publishes the water-quality measurements for Matjärvi. Here is what has been measured.
- Limited data
Matjärvi in Hollola, Finland has official water-quality measurements, shown as reported. Water clarity: 0.8 m visibility. Phosphorus: 62 µg/L. Chlorophyll-a (algae): 54 µg/L.
How Matjärvi is classified
Matjärvi 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.
Matjärvi is a lake in Hollola County, Finland.
Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2026-03-17. 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 Matjärvi 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 Matjärvi
These are the measurements Syke publishes for Matjärvi. More on the source.
Very murky, less than 2.6 ft of visibility. Phosphorus 62 µg/L. Chlorophyll-a 54 µg/L. TSI 66.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 0.8m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 62µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 54µg/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. | 66 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Frequently asked questions about Matjärvi
Where is Matjärvi?
- Matjärvi is a lake in Hollola, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Matjärvi?
- Matjärvi in Hollola, Finland has official water-quality measurements, shown as reported. Water clarity: 0.8 m visibility. Phosphorus: 62 µg/L. Chlorophyll-a (algae): 54 µg/L.
Is Matjärvi safe to swim in?
- Matjärvi 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.
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Where this data comes from
26 measurements from 1 monitoring station, 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-vesla26 samples · 2016–2026
Analytical methods
- SYKE VESLA
Monitoring station identifiers (1)
46922
Authority classifications are shown as the authority published them. See where the data comes from and data sources.