Onkivesi
Onkivesi in Lapinlahti, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.9 m visibility. Phosphorus: 51 µg/L. Chlorophyll-a (algae): 25.5 µg/L. Maximum depth: 119.8 ft.
- Clarity
- 0.9 m
- Max depth
- 36.5 m
Why Onkivesi has no A–F grade
Onkivesi 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.
Onkivesi is a lake in Lapinlahti County, Finland with a maximum depth of 120 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-10-09. 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 Onkivesi
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 3 ft of visibility. Phosphorus level: 51 µg/L. Chlorophyll-a: 25.5 µg/L. Trophic State Index: 62.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.9 m | Not graded |
| Phosphorus | 51 µg/L | Not graded |
| Chlorophyll-a (Algae) | 25.5 µg/L | Not graded |
| Trophic State Index (TSI) | 62 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 36.5 m |
Where to stay near Onkivesi
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Fishing Onkivesi
Frequently asked questions about Onkivesi
What is the water quality of Onkivesi?
- Onkivesi in Lapinlahti, Finland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.9 m visibility. Phosphorus: 51 µg/L. Chlorophyll-a (algae): 25.5 µg/L. Maximum depth: 119.8 ft.
Is Onkivesi safe to swim in?
- Onkivesi 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 Onkivesi?
- Onkivesi has a maximum depth of 119.8 feet.
Explore Onkivesi across LakeGrade
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Where this data comes from
981 measurements from 23 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-vesla981 samples · 2016–2025
Analytical methods
- SYKE VESLA
Monitoring station identifiers (23)
1790317871178394231817848178251780042319178721788617830709448309083089854778547817783178191782462851932471779458242
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: 2025-10-09
Monitoring stations: 23