Irnijärvi
Irnijärvi in Posio, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.9 m visibility. Phosphorus: 7.5 µg/L. Chlorophyll-a (algae): 6.3 µg/L. Maximum depth: 80.4 ft.
- Clarity
- 2.9 m
- Max depth
- 24.5 m
Why Irnijärvi has no A–F grade
Irnijärvi 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.
Irnijärvi is a lake in Posio County, Finland with a maximum depth of 80 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2018-09-06. Grade methodology: LakeGrade methodology.
Watch Irnijärvi 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 Irnijärvi
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Moderate clarity, visible to about 9.5 ft. Phosphorus level: 7.5 µg/L. Chlorophyll-a: 6.3 µg/L. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.9 m | Not graded |
| Phosphorus | 7.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | 6.3 µg/L | Not graded |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 24.5 m |
Where to stay near Irnijärvi
Compare lakeside cabins, hotels, and vacation rentals near Irnijärvi in Posio, 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 Irnijärvi
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Fishing Irnijärvi
Frequently asked questions about Irnijärvi
What is the water quality of Irnijärvi?
- Irnijärvi in Posio, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.9 m visibility. Phosphorus: 7.5 µg/L. Chlorophyll-a (algae): 6.3 µg/L. Maximum depth: 80.4 ft.
Is Irnijärvi safe to swim in?
- Irnijärvi 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 Irnijärvi?
- Irnijärvi has a maximum depth of 80.4 feet.
Explore Irnijärvi across LakeGrade
More lakes in Finland
Where this data comes from
15 measurements from 1 monitoring station, 2017–2018. 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-vesla15 samples · 2017–2018
Analytical methods
- SYKE VESLA
Monitoring station identifiers (1)
37208
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: 2018-09-06
Monitoring stations: 1