Stora Masungträsket Lake
Stora Masungträsket Lake in Kemiönsaari, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.3 m visibility. Phosphorus: 12.5 µg/L. Chlorophyll-a (algae): 10.2 µg/L. Maximum depth: 16.4 ft.
- Clarity
- 2.3 m
- Max depth
- 5 m
Why Stora Masungträsket Lake has no A–F grade
Stora Masungträsket 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 water clarity, phosphorus 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.
Stora Masungträsket Lake is a lake in Kemiönsaari County, Finland with a maximum depth of 16 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2022-08-31. 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 Stora Masungträsket Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Moderate clarity, visible to about 7.5 ft. Phosphorus level: 12.5 µg/L. Chlorophyll-a: 10.2 µg/L. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 m | Not graded |
| Phosphorus | 12.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | 10.2 µg/L | Not graded |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 5 m |
Where to stay near Stora Masungträsket Lake
Compare lakeside cabins, hotels, and vacation rentals near Stora Masungträsket Lake in Kemiönsaari, 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 Stora Masungträsket Lake
Frequently asked questions about Stora Masungträsket Lake
What is the water quality of Stora Masungträsket Lake?
- Stora Masungträsket Lake in Kemiönsaari, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.3 m visibility. Phosphorus: 12.5 µg/L. Chlorophyll-a (algae): 10.2 µg/L. Maximum depth: 16.4 ft.
Is Stora Masungträsket Lake safe to swim in?
- Stora Masungträsket 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.
How deep is Stora Masungträsket Lake?
- Stora Masungträsket Lake has a maximum depth of 16.4 feet.
Explore Stora Masungträsket Lake across LakeGrade
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Where this data comes from
12 measurements from 1 monitoring station, 2016–2022. 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-vesla12 samples · 2016–2022
Analytical methods
- SYKE VESLA
Monitoring station identifiers (1)
6682
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: 2022-08-31
Monitoring stations: 1