Drome Aval Saillans

France River 1 - Excellent

The Saillans municipality contains two declared bathing points on the Drôme river in the Drôme department (26) of France. These bathing zones are classified as profile type 1, indicating that proven pollution risk to the water is not evident. The bathing profile encompasses phases of baseline characterization, diagnostic analysis, and management measures, with focus on identifying pollution sources and ensuring water quality meets at least sufficient standards by 2015.

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Water

The Drôme river. Average water velocity is 0.5 m/s during low-flow periods and 3 to 4 m/s during flood periods. The study area extends 18 km upstream, corresponding to a 10-hour transfer time for pollutants at low-flow velocity.

Location

Saillans, Drôme department, France. The study area includes the municipalities of Saillans, Espenel, Vercheny, Barsac, Pontaix, Sainte-Croix, Ponet-et-Saint-Auban, and the area downstream of Die.

Water Quality

The bathing points are classified as profile type 1, meaning proven pollution risk is not apparent. Water quality assessment includes microbiological analysis. The study identifies domestic, agricultural, industrial, and storm-water pollution sources affecting the two bathing zones.

Risks

Identified pollution sources include domestic wastewater from the city of Saillans and other municipalities, non-collective sanitation systems, agricultural activities including wine caves and livestock operations, and accidental pollution from road traffic.