Overview
ONDARROA wastewater treatment plant serves the town of Ondarroa in Euskadi, Spain, with a designed capacity of 1.00 million cubic meters per year. It treats wastewater for a population of approximately 19,514 people.
The ONDARROA wastewater treatment plant is located in the town of Ondarroa, in the province of Bizkaia, within the autonomous community of Euskadi (Basque Country), Spain. The plant serves a population of around 19,514 residents, making it a medium-sized agglomeration under Spanish and European regulations. As a plant in the European Union, ONDARROA operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Cantabrian Sea (Bay of Biscay). This coastal region supports diverse marine life and is an important area for fisheries and tourism. The plant's operation helps protect the sensitive coastal environment from untreated sewage pollution.
Environmental context
The ONDARROA plant discharges into the local river system that flows into the Cantabrian Sea, part of the Bay of Biscay. This coastal area is ecologically sensitive, supporting diverse marine habitats and species, including commercially important fish stocks. The treatment plant plays a key role in maintaining water quality in the downstream estuary and coastal zone, which are used for recreation and fishing.
Frequently asked questions
The ONDARROA plant is located in Ondarroa, in the province of Bizkaia, within the autonomous community of Euskadi (Basque Country), Spain. Its address is BI-3438, Ondarroa, Bizkaia, Euskadi, 48700.
The plant serves a population of approximately 19,514 people, classifying it as a medium-sized agglomeration under EU regulations.
The treated wastewater is discharged into the local river system, which flows into the Cantabrian Sea (Bay of Biscay). The plant helps protect the coastal marine environment.
As a Spanish plant, ONDARROA operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size to protect sensitive coastal waters.
For agglomerations of this scale, the EU directive requires at least secondary treatment (biological treatment). Many plants also incorporate nutrient removal to protect coastal areas from eutrophication.
Nearby plants