Haarajärvi
Joensuu, FinlandView mapDirections
Syke publishes the water-quality measurements for Haarajärvi. Here is what has been measured.
- 38 ft max depth
- Limited data
Haarajärvi in Joensuu, Finland has official water-quality measurements, shown as reported. Water clarity: 1.3 m visibility. Phosphorus: 14 µg/L. Chlorophyll-a (algae): 5.9 µg/L. Maximum depth: 37.7 ft.
How Haarajärvi is classified
Haarajärvi in Finland is published with the authority's own measurements and class. The measurements here are published by the agency that samples the lake, as reported. Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
LakeQuality publishes no grade of its own beside it. Everything below thathas been measured is reported on this page.
Monitoring: the Finnish Environment Institute (Syke) and the ELY Centres.
Haarajärvi is a lake in Joensuu County, Finland with a maximum depth of 38 feet.
Source: the Finnish Environment Institute (Syke) and the ELY Centres — not the EPA Water Quality Portal, last sampled 2026-07-22. Methodology: how these readings are compared.
What Haarajärvi is good for
From access and monitoring records, not editorial picks.
- Deep water37.7 ft surveyed max depth
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Haarajärvi is safe to swim in today is a call for the Finnish Environment Institute (Syke) and the ELY Centres and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Haarajärvi
These are the measurements Syke publishes for Haarajärvi. More on the source.
Murky, only visible to about 4.1 ft. Phosphorus 14 µg/L. Chlorophyll-a 5.9 µg/L. TSI 49.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.25m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 14µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 5.9µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 49 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Haarajärvi
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
11.5 m
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Fishing Haarajärvi
Frequently asked questions about Haarajärvi
Where is Haarajärvi?
- Haarajärvi is a lake in Joensuu, Finland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Haarajärvi?
- Haarajärvi in Joensuu, Finland has official water-quality measurements, shown as reported. Water clarity: 1.3 m visibility. Phosphorus: 14 µg/L. Chlorophyll-a (algae): 5.9 µg/L. Maximum depth: 37.7 ft.
Is Haarajärvi safe to swim in?
- Haarajärvi 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 Haarajärvi?
- Haarajärvi has a maximum depth of 37.7 feet.
Explore Haarajärvi across LakeQuality
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Where this data comes from
65 measurements from 2 monitoring stations, 2016–2026. 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-vesla65 samples · 2016–2026
Analytical methods
- SYKE VESLA
Monitoring station identifiers (2)
5035450353
Authority classifications are shown as the authority published them. See where the data comes from and data sources.