Carhaix Moulin Hezec Wastewater Treatment Plant, Carhaix-Plouguer, Bretagne

Carhaix Moulin Hezec is a wastewater treatment plant located in Carhaix-Plouguer, in the Bretagne region of France. It serves a population equivalent of 81,000, classifying it as a large agglomeration under EU regulations. The plant is situated inland, more than 50 km from the coast, and its treated effluent is discharged into local watercourses that ultimately drain into the Atlantic Ocean. As a facility serving over 15,000 population equivalent, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment as a minimum. Given the sensitive nature of the receiving environment in Bretagne, the plant may also be required to provide more advanced treatment to protect water quality. The designed capacity is reported as 1.00 (likely in thousands of cubic meters per day), indicating a substantial treatment infrastructure. The plant plays a key role in protecting the local watershed, which includes rivers and streams flowing through the agricultural landscape of Finistère. The treated wastewater eventually reaches the Atlantic Ocean via the Aulne River or other coastal outlets. By ensuring proper treatment, the plant helps maintain the ecological health of these water bodies and supports biodiversity in the region.

The plant discharges into local rivers that are part of the broader watershed draining into the Atlantic Ocean. The region of Bretagne is known for its sensitive aquatic ecosystems, including salmonid rivers and coastal zones. The plant's treatment performance is critical to preventing nutrient enrichment and maintaining water quality in downstream environments, which support diverse aquatic life and are important for local fisheries and tourism.