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Mettmann wastewater treatment plant serves approximately 34,000 people in Nordrhein-Westfalen, Germany. The facility operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
Mettmann Metzkausen wastewater treatment plant serves approximately 4,900 residents in Mettmann, Nordrhein-Westfalen, Germany. The facility operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerat