Jeleń
LW20991, PolandView mapDirections
GIOŚ publishes the water-quality measurements for Jeleń. Here is what has been measured.
- Limited data
Jeleń in LW20991, Poland has official water-quality measurements, shown as reported. Water clarity: 6.3 m visibility. Chlorophyll-a (algae): 4.7 µg/L.
How Jeleń is classified
Jeleń in Poland 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 and algae (chlorophyll-a), but not phosphorus.
LakeQuality publishes no grade of its own beside it. Everything below thathas been measured is reported on this page.
Monitoring: the Chief Inspectorate of Environmental Protection (Główny Inspektorat Ochrony Środowiska).
Jeleń is a lake in LW20991 County, Poland.
Source: the Chief Inspectorate of Environmental Protection (Główny Inspektorat Ochrony Środowiska) — not the EPA Water Quality Portal, last sampled 2026-06-16. Methodology: how these readings are compared.
What Jeleń is good for
From access and monitoring records, not editorial picks.
- Clear water20.8 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Jeleń is safe to swim in today is a call for the Chief Inspectorate of Environmental Protection (Główny Inspektorat Ochrony Środowiska) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Jeleń
These are the measurements GIOŚ publishes for Jeleń. More on the source.
Crystal clear, you can see 20.8 ft down. Chlorophyll-a 4.7 µg/L. TSI 40.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 6.32m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | 4.7µg/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. | 40 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Jeleń
Answers come straight from the public measurements and survey records on this page.
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Frequently asked questions about Jeleń
Where is Jeleń?
- Jeleń is a lake in LW20991, Poland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Jeleń?
- Jeleń in LW20991, Poland has official water-quality measurements, shown as reported. Water clarity: 6.3 m visibility. Chlorophyll-a (algae): 4.7 µg/L.
Is Jeleń safe to swim in?
- Jeleń 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)
PL01S0202_2258
Authority classifications are shown as the authority published them. See where the data comes from and data sources.