Overview
BIGANOS 2 serves La Teste-de-Buch, France, treating wastewater for approximately 89,000 people. Located near the Arcachon Bay coast, it operates under the EU Urban Waste Water Treatment Directive.
BIGANOS 2 is a municipal wastewater treatment plant located in La Teste-de-Buch, in the Nouvelle-Aquitaine region of southwestern France. The plant serves a population of approximately 89,000, placing it in the large agglomeration category under EU regulations. Its coastal proximity to the Arcachon Bay area underscores its environmental significance. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations of this size are required to provide at least secondary treatment, with more stringent tertiary treatment if discharging into sensitive areas. The plant's designed capacity is 1. French wastewater facilities are regulated by the national water agencies and must comply with discharge permits issued under the Water Law. The treated effluent from BIGANOS 2 ultimately reaches the Arcachon Bay, a semi-enclosed marine inlet on the Atlantic coast. This bay supports diverse aquatic life, including seagrass beds and shellfish farming, making nutrient removal critical to prevent eutrophication. The plant plays a key role in protecting the bay's ecological balance and the regional tourism economy.
Environmental context
BIGANOS 2 discharges into the Arcachon Bay, a coastal lagoon connected to the Atlantic Ocean. The bay is an ecologically sensitive area that supports extensive oyster farming and migratory bird populations. Nutrient loading from wastewater can lead to algal blooms and hypoxia, threatening shellfish beds and biodiversity. The plant's performance is therefore critical to maintaining water quality in this productive marine ecosystem.
Frequently asked questions
BIGANOS 2 is located in La Teste-de-Buch, in the Gironde department of Nouvelle-Aquitaine, southwestern France. Its address is Le Wharf de la Salie, near the Arcachon Bay.
The plant serves approximately 89,063 people, classifying it as a large agglomeration under EU regulations.
The treated effluent from BIGANOS 2 is discharged into the Arcachon Bay, a coastal lagoon on the Atlantic coast. The plant's discharge is regulated to protect the bay's sensitive marine ecosystem.
BIGANOS 2 operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations over 15,000 population equivalent. French national water law further mandates discharge permits to protect water quality.
For large agglomerations in France, secondary treatment (biological) is standard. In sensitive coastal areas like Arcachon Bay, tertiary treatment for nutrient removal (nitrogen and phosphorus) is often required to prevent eutrophication.
Nearby plants