Anse De Guerledan

France Lake 1 - Excellent

Rond-Point beach is located on Lake Guerlédan, the largest artificial lake in Brittany, created by the Guerlédan dam on the Blavet river in 1930. The beach is situated on the commune of Guerlédan (Mûr de Bretagne) in Côtes-d'Armor, at the border between Morbihan and Côtes-d'Armor departments. The lake has a length of 12 km, a surface area of 400 hectares, and a maximum depth of 40 metres at the dam. The bathing water profile was updated in 2019 to assess vulnerability to pollution and identify risks to bather health.

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Water

Artificial freshwater lake created by dam construction in 1930. Length: 12 km. Surface area: 400 hectares. Maximum depth: 40 metres at the dam.

Location

Guerlédan (Mûr de Bretagne), Côtes-d'Armor, Brittany. The beach is one of four official bathing areas on Lake Guerlédan.

Water Quality

Water quality monitoring is conducted by health authorities (ARS) according to European Directive 2006/7/CE. The profile identifies episodic degradation events caused by microbiological pollution. Classification system uses four levels: insufficient, sufficient, good, and excellent, based on analyses from the preceding four years.

Risks

Potential microbiological pollution from various sources affecting bather health. Risk of cyanobacteria proliferation and associated toxins affecting skin, mucous membranes, nervous system, and liver. Identified risks include fecal-origin pathogens causing ear, nose, throat, digestive, and eye infections, leptospirosis from rodent bacteria, and dermatitis from parasites.