Overview
The METZ wastewater treatment plant serves the Metz metropolitan area in La Maxe, Grand Est, France. It handles a population equivalent of 289,700, operating under EU Urban Waste Water Treatment Directive standards.
The METZ wastewater treatment plant is located in La Maxe, a commune in the Moselle department of the Grand Est region in northeastern France. It serves the greater Metz urban area, one of the region's major population centers, with a population equivalent of approximately 289,700. As a large agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC), the plant is required to provide secondary treatment as a minimum, with tertiary treatment likely in place due to the sensitivity of the receiving environment. The plant's design capacity and treatment processes are aligned with the regulatory framework for agglomerations exceeding 150,000 population equivalents. The treated effluent is discharged into the Moselle River, a major tributary of the Rhine. The Moselle flows northward through Luxembourg and Germany before joining the Rhine at Koblenz. The Rhine basin supports diverse aquatic ecosystems and is an important migratory corridor for fish species such as salmon and eel.
Environmental context
The plant discharges into the Moselle River, which flows through the Grand Est region and eventually joins the Rhine River. The Rhine basin is a major European waterway supporting diverse aquatic life, including migratory fish. The Moselle is regulated for navigation and flood control, but its water quality is critical for downstream ecosystems and drinking water supplies.
Frequently asked questions
The METZ wastewater treatment plant is located in La Maxe, a commune in the Moselle department of the Grand Est region in northeastern France, near the city of Metz.
The METZ plant serves a population equivalent of approximately 289,700, covering the Metz urban area and surrounding communities.
The treated wastewater from the METZ plant is discharged into the Moselle River, which flows through France, Luxembourg, and Germany before joining the Rhine River.
Under the EU Urban Waste Water Treatment Directive (91/271/EEC), the METZ plant, serving over 150,000 population equivalents, is classified as a large agglomeration. It is required to provide secondary treatment, with tertiary treatment likely needed to protect the sensitive Rhine basin.
In France, wastewater treatment plants serving populations over 150,000 typically employ secondary biological treatment (activated sludge) and often include tertiary treatment such as nutrient removal (nitrogen and phosphorus) to meet EU water quality standards for sensitive areas.
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