Jeziorak
Jeziorak in LW20116, Poland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.9 m visibility. Phosphorus: 71 µg/L.
- Clarity
- 1.9 m
Why Jeziorak has no A–F grade
Jeziorak 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 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 Chief Inspectorate of Environmental Protection (Główny Inspektorat Ochrony Środowiska).
Jeziorak is a lake in LW20116 County, Poland.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2026-06-18. 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 Jeziorak
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 6.1 ft. Phosphorus level: 71 µg/L. Trophic State Index: 58.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.85 m | Not graded |
| Phosphorus | 71 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 58 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Jeziorak
Compare lakeside cabins, hotels, and vacation rentals near Jeziorak in LW20116, 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 Jeziorak
Frequently asked questions about Jeziorak
What is the water quality of Jeziorak?
- Jeziorak in LW20116, Poland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.9 m visibility. Phosphorus: 71 µg/L.
Is Jeziorak safe to swim in?
- Jeziorak 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
4 measurements from 1 monitoring station, 2026. Retrieved from GIOŚ lake monitoring (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Główny Inspektorat Ochrony Środowiska
gios-pjwp4 samples · —
Analytical methods
- GIOŚ PJWP lake monitoring
Monitoring station identifiers (1)
PL01S0302_3529
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: 2026-06-18
Monitoring stations: 1