Where is Żnińskie Duże?

Żnińskie Duże is a lake in LW10463, Poland. This page reports official water-quality measurements, shown as reported.

Is Żnińskie Duże safe to swim in?

Żnińskie Duże 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.

Żnińskie Duże

LW10463, PolandView map Directions

GIOŚ publishes the water-quality measurements for Żnińskie Duże. Here is what has been measured.

Clarity

0.6 m

Murkier than most

Secchi · sampled 2024

Phosphorus

554 µg/L

More phosphorus than most

Measured by GIOŚ

Limited data

See the measurements Directions Where to stay

Żnińskie Duże in LW10463, Poland has official water-quality measurements, shown as reported. Water clarity: 0.6 m visibility. Phosphorus: 554 µg/L.

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How Żnińskie Duże is classified

Żnińskie Duże 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 phosphorus, but not algae (chlorophyll-a).

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).

Żnińskie Duże is a lake in LW10463 County, Poland.

Source: the Chief Inspectorate of Environmental Protection (Główny Inspektorat Ochrony Środowiska) — not the EPA Water Quality Portal, last sampled 2024-10-24. Methodology: how these readings are compared.

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Żnińskie Duże 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.

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Water quality measurements for Żnińskie Duże

These are the measurements GIOŚ publishes for Żnińskie Duże. More on the source.

Very murky, less than 1.8 ft of visibility. Phosphorus 554 µg/L. TSI 82.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	0.55m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	554µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)		No reading 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.	82	Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic

Very high nutrients, dense algae, poor clarity

Ask about Żnińskie Duże

Answers come straight from the public measurements and survey records on this page.

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Stays near Żnińskie Duże

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Fishing Żnińskie Duże

→ Żnińskie Duże fishing regulations (limits, seasons, special rules)

Frequently asked questions about Żnińskie Duże

Where is Żnińskie Duże?: Żnińskie Duże is a lake in LW10463, Poland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Żnińskie Duże?: Żnińskie Duże in LW10463, Poland has official water-quality measurements, shown as reported. Water clarity: 0.6 m visibility. Phosphorus: 554 µg/L.
Is Żnińskie Duże safe to swim in?: Żnińskie Duże 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

8 measurements from 1 monitoring station, 2024. Retrieved from GIOŚ lake monitoring (not the EPA Water Quality Portal) on 2026-08-16.

Collected and reported by

Główny Inspektorat Ochrony Środowiskagios-pjwp8 samples · —

Analytical methods

GIOŚ PJWP lake monitoring

Monitoring station identifiers (1)

PL02S0602_0388

Authority classifications are shown as the authority published them. See where the data comes from and data sources.