Ciemno
LW20259, PolandView mapDirections
GIOŚ publishes the water-quality measurements for Ciemno. Here is what has been measured.
- Limited data
Ciemno in LW20259, Poland has official water-quality measurements, shown as reported. Water clarity: 1 m visibility. Phosphorus: 162.5 µg/L. Chlorophyll-a (algae): 55 µg/L.
How Ciemno is classified
Ciemno 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, phosphorus and 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).
Ciemno is a lake in LW20259 County, Poland.
Source: the Chief Inspectorate of Environmental Protection (Główny Inspektorat Ochrony Środowiska) — not the EPA Water Quality Portal, last sampled 2026-06-17. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Ciemno 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 Ciemno
These are the measurements GIOŚ publishes for Ciemno. More on the source.
Very murky, less than 3.3 ft of visibility. Phosphorus 162.5 µg/L. Chlorophyll-a 55 µg/L. TSI 69.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 163µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 55µg/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. | 69 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Frequently asked questions about Ciemno
Where is Ciemno?
- Ciemno is a lake in LW20259, Poland. This page reports official water-quality measurements, shown as reported.
What is the water quality of Ciemno?
- Ciemno in LW20259, Poland has official water-quality measurements, shown as reported. Water clarity: 1 m visibility. Phosphorus: 162.5 µg/L. Chlorophyll-a (algae): 55 µg/L.
Is Ciemno safe to swim in?
- Ciemno 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
6 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-pjwp6 samples · —
Analytical methods
- GIOŚ PJWP lake monitoring
Monitoring station identifiers (1)
PL01S0202_0107
Authority classifications are shown as the authority published them. See where the data comes from and data sources.