Cesse-Le Boulidou

France River 3 - Sufficient

Le Boulidou is a bathing site on the Cesse river in the commune of Agel, in the Hérault department. The bathing water is fed exclusively by karstic groundwater during the summer season, as the Cesse riverbed remains dry upstream for 10 to 20 kilometers until autumn rains. The water quality was classified as excellent in 2010. This bathing profile was developed in March 2011 and classified as Type 2, indicating known contamination risks with identified causes.

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Water

The Cesse river, fed by karstic groundwater (résurgence). The river is dry upstream for 10 to 20 kilometers above the bathing site during summer months. Karstic circulation flows are rapid, particularly following rainfall events. Water volumes in karstic reservoirs are generally substantial.

Location

Commune of Agel, Hérault department, France. Located at a karstic spring (résurgence) that feeds the Cesse river.

Season

Summer season. The Cesse riverbed becomes dry and flow resumes only in autumn after significant rainfall.

Water Quality

Water quality classified as excellent in 2010. Profile type 2 (known contamination risks with identified causes). Bacteriological quality monitoring was conducted. The bathing water is vulnerable to contamination from domestic and agricultural pollution sources across the karstic basin.

Risks

Risks from domestic and agricultural pollution sources within the karstic basin. Cyanobacteria and aquatic vegetation proliferation potential must be evaluated. Accidental pollution risks are present. Karstic circulation lacks sunlight-based self-purification and water is not systematically filtered through soil before entering the karstic system.