In the Faou estuary, work to help farmers limit the pollution of waterways – Le Faou



The Faou estuary alternates between muddy space at low tide and maritime space at high tide, which gives it a particularly rich plant and animal biodiversity. This space also has a deposit of clams which cannot be marketed, due to the high levels of faecal bacteria.

Bacteria indicating disturbances

The presence of fecal bacteria in water is natural. But their presence in excess in watercourses is an indicator of disturbances: malfunctions of treatment plants, unsuitable individual sanitation, poor management of livestock effluents, etc.

Diagnoses over the entire Faou catchment area (Le Faou, Rosnoën, Pont-de-Buis, Hanvec and Lopérec) to determine the potential sources of faecal bacteria intake have resulted in an action program aimed at reducing less contamination.

Epaga supports farmers

The Public Establishment for the Development and Management of the Aulne Watershed (Epaga) met around fifty farmers in the Faou watershed. This consultation resulted, in 2021, in the replacement of five undersized buses and the development of intra-plot fords, preventing the passage of animals in the waterways.

Tuesday, June 14, began a series of works in the farms, launching the second phase of the project concerning the management of rainwater.

“Reconquest of the sanitary quality of clams”

“This action is part of the implementation of the Faou shellfish vulnerability profile, which aims to regain the sanitary quality of Faou clams”, explains Laurianne Rioual, quality manager of the water at the Epaga.

“The farm has a lot of springs and when it rains, there is a lot of runoff,” explains Patrice Rolland, farmer at Penn ar Yeun. This grassy retention basin will filter the water before it flows into the river”.

This program benefits from European LEADER funding granted by the Pays de Brest, the Loire-Bretagne Water Agency and the Brittany Region, which makes it free for farmers.

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