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LakeQuality

Yeadon Tarn

Yorkshire, EnglandView mapDirections

EA publishes the water-quality measurements for Yeadon Tarn. Here is what has been measured.

Phosphorus
103.5 µg/L
More phosphorus than most
Measured by EA
Chlorophyll-a
21.5 µg/L
More algae than most
Measured by EA
  • Limited data

Yeadon Tarn in Yorkshire, England has official water-quality measurements, shown as reported. Phosphorus: 103.5 µg/L. Chlorophyll-a (algae): 21.5 µg/L.

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How Yeadon Tarn is classified

Yeadon Tarn in England 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 phosphorus and algae (chlorophyll-a), but not water clarity.

LakeQuality publishes no grade of its own beside it. Everything below thathas been measured is reported on this page.

Monitoring: the Environment Agency (England).

Yeadon Tarn is a lake in Yorkshire County, England.

Source: the Environment Agency (England) — not the EPA Water Quality Portal, last sampled 2026-05-27. 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 Yeadon Tarn is safe to swim in today is a call for the Environment Agency (England) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Yeadon Tarn

These are the measurements EA publishes for Yeadon Tarn. More on the source.

No clarity data. Phosphorus 103.5 µg/L. Chlorophyll-a 21.5 µg/L. TSI 66.

Water quality readings
MeasureReadingWhere it sits
Water clarity (Secchi depth)No reading

How deep a black-and-white disk stays visible from the surface. Higher is clearer.

Total phosphorus104µg/LMeasured, not scored

The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.

Chlorophyll-a (algae)21.5µg/LMeasured, 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.66Eutrophic
OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Yeadon Tarn

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

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Fishing Yeadon Tarn

Frequently asked questions about Yeadon Tarn

Where is Yeadon Tarn?

Yeadon Tarn is a lake in Yorkshire, England. This page reports official water-quality measurements, shown as reported.

What is the water quality of Yeadon Tarn?

Yeadon Tarn in Yorkshire, England has official water-quality measurements, shown as reported. Phosphorus: 103.5 µg/L. Chlorophyll-a (algae): 21.5 µg/L.

Measurements on this page ↑

Is Yeadon Tarn safe to swim in?

Yeadon Tarn 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.

Swimming on this page ↑

Where this data comes from

4 measurements from 1 monitoring station, 2026. Retrieved from the Environment Agency (England; not the EPA Water Quality Portal) on 2026-08-16.

Collected and reported by

  • Environment Agency (England)ea-wqa4 samples · 2026
Monitoring station identifiers (1)
  • NE-LSN0207

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