Niemenjärvi
Niemenjärvi in Vihti, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.9 m visibility. Phosphorus: 16 µg/L. Chlorophyll-a (algae): 8.4 µg/L. Maximum depth: 32.5 ft.
- Clarity
- 0.9 m
- Max depth
- 9.9 m
Why Niemenjärvi has no A–F grade
Niemenjärvi 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.
Niemenjärvi is a lake in Vihti County, Finland with a maximum depth of 33 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-08-31. 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 Niemenjärvi
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 3 ft of visibility. Phosphorus level: 16 µg/L. Chlorophyll-a: 8.4 µg/L. Trophic State Index: 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.9 m | Not graded |
| Phosphorus | 16 µg/L | Not graded |
| Chlorophyll-a (Algae) | 8.4 µg/L | Not graded |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 9.9 m |
Where to stay near Niemenjärvi
Compare lakeside cabins, hotels, and vacation rentals near Niemenjärvi in Vihti, 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 Niemenjärvi
Frequently asked questions about Niemenjärvi
What is the water quality of Niemenjärvi?
- Niemenjärvi in Vihti, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.9 m visibility. Phosphorus: 16 µg/L. Chlorophyll-a (algae): 8.4 µg/L. Maximum depth: 32.5 ft.
Is Niemenjärvi safe to swim in?
- Niemenjärvi 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 Niemenjärvi?
- Niemenjärvi has a maximum depth of 32.5 feet.
Explore Niemenjärvi across LakeGrade
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Where this data comes from
13 measurements from 1 monitoring station, 2018–2021. 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-vesla13 samples · 2018–2021
Analytical methods
- SYKE VESLA
Monitoring station identifiers (1)
1533
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: 2021-08-31
Monitoring stations: 1