CAUTERETS Wastewater Treatment Plant, Cauterets, Occitanie, France

The CAUTERETS wastewater treatment plant is located in the commune of Cauterets, within the Hautes-Pyrénées department of Occitanie, France. It serves a population of approximately 8,500 residents, placing it in the small-to-medium agglomeration category under French regulations. As a French plant, CAUTERETS operates under the national transposition of the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size, the directive requires secondary treatment as a minimum, with potential additional nutrient removal if the receiving waters are designated as sensitive areas. The plant's treatment process and capacity details are not publicly available, but it is expected to meet these regulatory standards. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Gave de Pau river system and then into the Adour basin before reaching the Atlantic Ocean. The surrounding area is part of the Pyrenees National Park region, an ecologically sensitive zone that supports diverse aquatic life and is important for migratory species.

The CAUTERETS plant discharges into the Gave de Pau river, a tributary of the Adour river, which flows into the Bay of Biscay (Atlantic Ocean). The receiving waters are in a mountainous region near the Pyrenees National Park, supporting sensitive aquatic ecosystems. The area is known for its biodiversity, including salmonid fish populations, and requires careful management of nutrient loads to prevent eutrophication.