Overview
Larissa wastewater treatment plant serves approximately 145,592 people in Thessaly, Greece. It operates under EU Urban Waste Water Treatment Directive 91/271/EEC, which mandates secondary treatment for agglomerations of this scale.
The Larissa wastewater treatment plant is a major municipal facility serving the city of Larissa, the capital of the Thessaly region in central Greece. With a population equivalent of approximately 145,592, it is classified as a large agglomeration under EU regulations, requiring advanced treatment to protect sensitive receiving waters. As a facility serving over 100,000 people, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary biological treatment as a minimum, and tertiary treatment if the receiving water body is designated as sensitive. The plant's designed capacity is 1.00 (likely in cubic meters per day or similar unit), indicating a substantial infrastructure investment to manage the region's wastewater. The treated effluent is discharged into the local hydrological network, which ultimately drains into the Aegean Sea via the Pineios River. The Thessaly plain is an agriculturally important area, and the plant plays a critical role in preventing nutrient pollution that could harm downstream aquatic ecosystems and coastal waters.
Environmental context
The plant's discharge flows into the Pineios River, which traverses the fertile Thessaly plain and empties into the Thermaic Gulf of the Aegean Sea. This coastal zone supports diverse marine life and is an important fishing ground. Effective nutrient removal is essential to prevent eutrophication in the gulf, which can lead to algal blooms and oxygen depletion.
Frequently asked questions
The plant is located in Larissa, the capital of the Thessaly region in central Greece, within the municipality of Larisaioi.
The plant serves approximately 145,592 people, classifying it as a large agglomeration under EU regulations.
Treated effluent is discharged into the Pineios River, which flows through the Thessaly plain and into the Thermaic Gulf of the Aegean Sea.
As a Greek facility serving over 100,000 people, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment and potentially tertiary treatment for sensitive areas.
Under the EU Urban Waste Water Treatment Directive, plants serving over 100,000 people must provide at least secondary biological treatment. If the receiving water is sensitive, tertiary treatment for nutrient removal is also required.
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