Gennarbyträsket Lake
Gennarbyträsket Lake in Raasepori, Finland has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 13 µg/L.
Why Gennarbyträsket Lake has no A–F grade
Gennarbyträsket Lake in Finland is published with the authority's own measurements, not a LakeQuality letter. official authority class; not a LakeQuality A–F letter Sampling here has recorded phosphorus, but not water clarity and algae (chlorophyll-a).
A letter on the LakeQuality scale would be an invention, not an official class. Everything below that has been measured is still reported on this page.
Monitoring: the Finnish Environment Institute (Syke) and the ELY Centres.
Gennarbyträsket Lake is a lake in Raasepori County, Finland.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2018-07-17. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Gennarbyträsket Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 13 µg/L. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 13 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Gennarbyträsket Lake
Compare lakeside cabins, hotels, and vacation rentals near Gennarbyträsket Lake in Raasepori, Finland — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Fishing Gennarbyträsket Lake
Frequently asked questions about Gennarbyträsket Lake
What is the water quality of Gennarbyträsket Lake?
- Gennarbyträsket Lake in Raasepori, Finland has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 13 µg/L.
Is Gennarbyträsket Lake safe to swim in?
- Gennarbyträsket 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.
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Where this data comes from
3 measurements from 3 monitoring stations, 2018. 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-vesla3 samples · 2018
Analytical methods
- SYKE VESLA
Monitoring station identifiers (3)
853078530985310
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See methodology and data sources.
Data Sources
Water quality data from the EPA Water Quality Portal
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2018-07-17
Monitoring stations: 3