Hiijärvi
Hiijärvi in Luumäki, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.7 m visibility. Phosphorus: 11.7 µg/L.
- Clarity
- 2.7 m
Why Hiijärvi has no A–F grade
Hiijärvi 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 and phosphorus, but not 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.
Hiijärvi is a lake in Luumäki County, Finland.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-09-02. 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 Hiijärvi
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Moderate clarity, visible to about 8.9 ft. Phosphorus level: 11.7 µg/L. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.7 m | Not graded |
| Phosphorus | 11.7 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Hiijärvi
Compare lakeside cabins, hotels, and vacation rentals near Hiijärvi in Luumäki, 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.
Top-rated places to stay near Hiijärvi
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Fishing Hiijärvi
Frequently asked questions about Hiijärvi
What is the water quality of Hiijärvi?
- Hiijärvi in Luumäki, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.7 m visibility. Phosphorus: 11.7 µg/L.
Is Hiijärvi safe to swim in?
- Hiijärvi 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 Hiijärvi?
- The available depth estimate for Hiijärvi is shallower than its measured water clarity, which cannot be right, so no depth is shown.
Explore Hiijärvi across LakeGrade
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Where this data comes from
4 measurements from 1 monitoring station, 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-vesla4 samples · 2021
Analytical methods
- SYKE VESLA
Monitoring station identifiers (1)
11851
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: 2021-09-02
Monitoring stations: 1