Alajärvi
Alajärvi in Hämeenlinna, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.6 m visibility. Phosphorus: 13 µg/L. Chlorophyll-a (algae): 8.6 µg/L. Maximum depth: 57.4 ft.
- Clarity
- 1.6 m
- Max depth
- 17.5 m
Why Alajärvi has no A–F grade
Alajärvi 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.
Alajärvi is a lake in Hämeenlinna County, Finland with a maximum depth of 57 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-08-22. 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 Alajärvi
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 5.2 ft. Phosphorus level: 13 µg/L. Chlorophyll-a: 8.6 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 m | Not graded |
| Phosphorus | 13 µg/L | Not graded |
| Chlorophyll-a (Algae) | 8.6 µg/L | Not graded |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 17.5 m |
Where to stay near Alajärvi
Compare lakeside cabins, hotels, and vacation rentals near Alajärvi in Hämeenlinna, 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 Alajärvi
Frequently asked questions about Alajärvi
What is the water quality of Alajärvi?
- Alajärvi in Hämeenlinna, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.6 m visibility. Phosphorus: 13 µg/L. Chlorophyll-a (algae): 8.6 µg/L. Maximum depth: 57.4 ft.
Is Alajärvi safe to swim in?
- Alajärvi 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 Alajärvi?
- Alajärvi has a maximum depth of 57.4 feet.
Explore Alajärvi across LakeGrade
More lakes in Finland
Where this data comes from
167 measurements from 2 monitoring stations, 2016–2025. 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-vesla167 samples · 2016–2025
Analytical methods
- SYKE VESLA
Monitoring station identifiers (2)
23372338
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: 2025-08-22
Monitoring stations: 2