Overview
BAZTAN wastewater treatment plant serves the municipality of Baztan in Navarra, Spain. It has a designed capacity of 1.00 and serves a population of 6,459.
BAZTAN wastewater treatment plant is located in Oharriz, Baztan, within the Baztan-Bidasoa region of Navarra, Spain. The facility serves a population of approximately 6,459 people and has a designed capacity of 1.00, indicating it is a small-scale municipal treatment plant. As a Spanish plant serving fewer than 10,000 people, BAZTAN operates under the national transposition of the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size, the directive requires appropriate treatment, typically secondary treatment, to protect receiving water bodies. It is expected to meet the regulatory standards for its scale. The plant discharges treated wastewater into local watercourses that flow through the Baztan valley, part of the Bidasoa river basin. The Bidasoa River eventually reaches the Bay of Biscay (Atlantic Ocean) at the France-Spain border. The surrounding area is ecologically sensitive, supporting diverse aquatic life and serving as a migratory corridor for species such as salmon and eels.
Environmental context
The BAZTAN plant discharges into the Baztan river system, which feeds into the Bidasoa River. The Bidasoa flows northward to the Bay of Biscay, a productive marine ecosystem. The watershed supports diverse aquatic habitats, including salmonid spawning grounds, and is important for regional biodiversity. The plant's treatment performance is critical to maintaining water quality in this ecologically sensitive river basin.
Frequently asked questions
The BAZTAN wastewater treatment plant is located in Oharriz, Baztan, in the Baztan-Bidasoa region of Navarra, Spain.
The BAZTAN plant serves a population of approximately 6,459 people in the Baztan municipality.
The plant discharges treated wastewater into local watercourses that flow into the Bidasoa River, which ultimately reaches the Bay of Biscay.
As a Spanish plant, BAZTAN operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment for agglomerations of its size to protect water quality.
For agglomerations of this scale, the EU directive typically mandates secondary treatment to reduce organic matter and suspended solids before discharge into sensitive water bodies.
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