Dommartin Chef Lieu 69076 Wastewater Treatment Plant, Dommartin, France

Dommartin Chef Lieu 69076 is an advanced wastewater treatment plant located in Dommartin, a commune in the Rhône department of Auvergne-Rhône-Alpes, France. The plant serves a population of approximately 2,236 residents, reflecting its role as a small-scale municipal facility in a semi-rural setting. Its advanced treatment level ensures high-quality effluent before discharge. The plant has a designed capacity of 2,000 m³/day and currently treats an average daily volume of 398.90 m³, indicating ample reserve capacity. As a French facility, it operates under the national regulations transposing the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment for agglomerations of this size. Advanced treatment is typical for sensitive areas or where receiving waters require nutrient removal. The treated effluent is discharged into the local watercourse, which flows into the Saône River, a major tributary of the Rhône. The Rhône ultimately drains into the Mediterranean Sea. The plant's location inland, over 50 km from the coast, means its discharge contributes to freshwater ecosystems rather than directly impacting marine environments. The surrounding region is characterized by agricultural and residential land use.

The plant discharges into a local stream that feeds the Saône River, a key waterway in the Rhône basin. The Saône joins the Rhône near Lyon, and the Rhône flows into the Mediterranean Sea. This watershed supports diverse aquatic life and is important for regional water supply and agriculture. The advanced treatment helps protect downstream water quality, reducing nutrient loads that could cause eutrophication in the river and coastal zone.