Katumajärvi
Katumajärvi in Hämeenlinna, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.8 m visibility. Phosphorus: 13.5 µg/L. Chlorophyll-a (algae): 5.1 µg/L. Maximum depth: 54.8 ft.
- Clarity
- 2.8 m
- Max depth
- 16.7 m
Why Katumajärvi has no A–F grade
Katumajärvi 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.
Katumajärvi is a lake in Hämeenlinna County, Finland with a maximum depth of 55 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2026-07-14. Grade methodology: LakeGrade methodology.
Watch Katumajärvi water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Katumajärvi
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Moderate clarity, visible to about 9.2 ft. Phosphorus level: 13.5 µg/L. Chlorophyll-a: 5.1 µg/L. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.8 m | Not graded |
| Phosphorus | 13.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | 5.1 µg/L | Not graded |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 16.7 m |
Where to stay near Katumajärvi
Compare lakeside cabins, hotels, and vacation rentals near Katumajärvi 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.
Top-rated places to stay near Katumajärvi
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Fishing Katumajärvi
Frequently asked questions about Katumajärvi
What is the water quality of Katumajärvi?
- Katumajärvi in Hämeenlinna, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.8 m visibility. Phosphorus: 13.5 µg/L. Chlorophyll-a (algae): 5.1 µg/L. Maximum depth: 54.8 ft.
Is Katumajärvi safe to swim in?
- Katumajärvi 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 Katumajärvi?
- Katumajärvi has a maximum depth of 54.8 feet.
Explore Katumajärvi across LakeGrade
More lakes in Finland
Where this data comes from
66 measurements from 5 monitoring stations, 2017–2026. 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-vesla66 samples · 2017–2026
Analytical methods
- SYKE VESLA
Monitoring station identifiers (5)
1682169216766102591480
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: 2026-07-14
Monitoring stations: 5