Where is Retenue de Kerne Uhel?

Retenue de Kerne Uhel is a lake in Côtes-d'Armor, France. This page reports official water-quality measurements, shown as reported.

Is Retenue de Kerne Uhel safe to swim in?

Retenue de Kerne Uhel 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.

Retenue de Kerne Uhel

Côtes-d'Armor, FranceView map Directions

Eau France publishes the water-quality measurements for Retenue de Kerne Uhel. Here is what has been measured.

Clarity

1.1 m

Typical for France

Secchi · sampled 2023

Phosphorus

40 µg/L

Typical for France

Measured by Eau France

Chlorophyll-a

20 µg/L

More algae than most

Measured by Eau France

Limited data

See the measurements Directions Where to stay

Retenue de Kerne Uhel in Côtes-d'Armor, France has official water-quality measurements, shown as reported. Water clarity: 1.1 m visibility. Phosphorus: 40 µg/L. Chlorophyll-a (algae): 20 µg/L.

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How Retenue de Kerne Uhel is classified

Retenue de Kerne Uhel in France 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 French water agencies, via UNEP GEMS/Water.

Retenue de Kerne Uhel is a lake in Côtes-d'Armor County, France.

Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2023-09-25. 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 Retenue de Kerne Uhel is safe to swim in today is a call for the French water agencies, via UNEP GEMS/Water and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Retenue de Kerne Uhel

These are the measurements Eau France publishes for Retenue de Kerne Uhel. More on the source.

Murky, only visible to about 3.5 ft. Phosphorus 40 µg/L. Chlorophyll-a 20 µg/L. TSI 59.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	1.06m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	40µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	20µg/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.	59	Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Retenue de Kerne Uhel

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

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Stays near Retenue de Kerne Uhel

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Fishing Retenue de Kerne Uhel

→ Retenue de Kerne Uhel fishing regulations (limits, seasons, special rules)

Frequently asked questions about Retenue de Kerne Uhel

Where is Retenue de Kerne Uhel?: Retenue de Kerne Uhel is a lake in Côtes-d'Armor, France. This page reports official water-quality measurements, shown as reported.
What is the water quality of Retenue de Kerne Uhel?: Retenue de Kerne Uhel in Côtes-d'Armor, France has official water-quality measurements, shown as reported. Water clarity: 1.1 m visibility. Phosphorus: 40 µg/L. Chlorophyll-a (algae): 20 µg/L.
Is Retenue de Kerne Uhel safe to swim in?: Retenue de Kerne Uhel 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.

Explore Retenue de Kerne Uhel across LakeQuality

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Where this data comes from

180 measurements from 1 monitoring station, 2016–2023. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-20.

Collected and reported by

Office français de la biodiversité (Hub'Eau)hubeau-fr180 samples · —

Analytical methods

Hub'Eau / Naïades plans d'eau

Monitoring station identifiers (1)

J520520T

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