LARAGNE Wastewater Treatment Plant, Laragne-Montéglin, Provence-Alpes-Côte d'Azur

LARAGNE is a municipal wastewater treatment plant located in Laragne-Montéglin, a commune in the Hautes-Alpes department of the Provence-Alpes-Côte d'Azur region in southeastern France. The plant serves a population of approximately 3,750 residents and is situated in a rural-to-urban transition area near the foothills of the Alps. As a secondary treatment facility, LARAGNE operates under the European Union's Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The plant has a designed capacity of 4,500 m³/day and currently treats an average daily flow of about 669 m³, indicating significant spare capacity for future growth or seasonal variations. The treated effluent is discharged into the local watershed, which ultimately drains into the Durance River, a major tributary of the Rhône River. The Durance River supports diverse aquatic life and is an important water resource for irrigation and hydroelectric power in the region. The plant's inland location and secondary treatment level help protect downstream water quality in this ecologically sensitive alpine river system.

The plant discharges into the local watershed that feeds the Durance River, a major tributary of the Rhône River. The Durance River flows through the Provence-Alpes-Côte d'Azur region and supports diverse aquatic ecosystems, including fish species such as brown trout and barbel. The river is also used for irrigation and hydroelectric power generation. The plant's secondary treatment helps reduce organic pollutants and protect water quality in this ecologically important river system.