Olecko Wielkie
Olecko Wielkie in LW30045, Poland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 3.6 m visibility. Phosphorus: 25 µg/L. Chlorophyll-a (algae): 6.1 µg/L.
- Clarity
- 3.6 m
Why Olecko Wielkie has no A–F grade
Olecko Wielkie in Poland 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 Chief Inspectorate of Environmental Protection (Główny Inspektorat Ochrony Środowiska).
Olecko Wielkie is a lake in LW30045 County, Poland.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-10-15. 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 Olecko Wielkie
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 11.9 ft. Phosphorus level: 25 µg/L. Chlorophyll-a: 6.1 µg/L. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.64 m | Not graded |
| Phosphorus | 25 µg/L | Not graded |
| Chlorophyll-a (Algae) | 6.1 µg/L | Not graded |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Olecko Wielkie
Compare lakeside cabins, hotels, and vacation rentals near Olecko Wielkie in LW30045, Poland — 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.
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Fishing Olecko Wielkie
Frequently asked questions about Olecko Wielkie
What is the water quality of Olecko Wielkie?
- Olecko Wielkie in LW30045, Poland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 3.6 m visibility. Phosphorus: 25 µg/L. Chlorophyll-a (algae): 6.1 µg/L.
Is Olecko Wielkie safe to swim in?
- Olecko Wielkie 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.
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Where this data comes from
12 measurements from 1 monitoring station, 2025. Retrieved from GIOŚ lake monitoring (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Główny Inspektorat Ochrony Środowiska
gios-pjwp12 samples · —
Analytical methods
- GIOŚ PJWP lake monitoring
Monitoring station identifiers (1)
PL01S0302_3918
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: 2025-10-15
Monitoring stations: 1