2 plants indexed.
Freixo wastewater treatment plant serves Porto, Portugal, with a designed capacity of 1.00 cubic meters per second. It treats wastewater from approximately 85,000 people, discharging into the Douro River basin.
Sobreiras wastewater treatment plant serves 180,000 people in Porto, Portugal. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.