Ahmasjärvi
Ahmasjärvi in Oulu, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.5 m visibility. Phosphorus: 21 µg/L.
- Clarity
- 0.5 m
Why Ahmasjärvi has no A–F grade
Ahmasjärvi 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.
Ahmasjärvi is a lake in Oulu County, Finland.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-07-30. Grade methodology: LakeGrade methodology.
Watch Ahmasjärvi 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 Ahmasjärvi
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 1.6 ft of visibility. Phosphorus level: 21 µg/L. Trophic State Index: 59.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.5 m | Not graded |
| Phosphorus | 21 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Ahmasjärvi
Compare lakeside cabins, hotels, and vacation rentals near Ahmasjärvi in Oulu, 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 Ahmasjärvi
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Fishing Ahmasjärvi
Frequently asked questions about Ahmasjärvi
What is the water quality of Ahmasjärvi?
- Ahmasjärvi in Oulu, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.5 m visibility. Phosphorus: 21 µg/L.
Is Ahmasjärvi safe to swim in?
- Ahmasjärvi 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.
Explore Ahmasjärvi across LakeGrade
More lakes in Finland
Where this data comes from
2 measurements from 1 monitoring station, 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-vesla2 samples · 2025
Analytical methods
- SYKE VESLA
Monitoring station identifiers (1)
63988
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: 2025-07-30
Monitoring stations: 1