Overview
ONNAING wastewater treatment plant serves the commune of Onnaing in Hauts-de-France, France. It treats wastewater for approximately 8,525 residents under the EU Urban Waste Water Treatment Directive.
The ONNAING wastewater treatment plant is located in Onnaing, a commune in the Nord department of Hauts-de-France, France. It serves a population of approximately 8,525 people, classifying it as a small to medium agglomeration under EU regulations. The plant is situated near Valenciennes and operates within the region's municipal wastewater infrastructure. As a French treatment facility, ONNAING is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive aims to protect water quality by ensuring adequate treatment before discharge. The plant meets the regulatory standards applicable to its population equivalent. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Scheldt River basin. The Scheldt flows through northern France and Belgium before reaching the North Sea. This waterway supports diverse aquatic life and is an important ecological corridor in the region.
Environmental context
The ONNAING plant discharges into the Scheldt River basin, which flows through Hauts-de-France and into Belgium, eventually reaching the North Sea. The Scheldt estuary is ecologically significant, supporting migratory fish and bird species. The plant's treatment helps reduce nutrient loads and pollutants entering this sensitive waterway, contributing to the health of the downstream marine environment.
Frequently asked questions
The ONNAING plant is located on Route de Thiers in Onnaing, near Valenciennes, in the Nord department of Hauts-de-France, France.
The plant serves approximately 8,525 residents in the commune of Onnaing and surrounding areas.
The treated effluent from ONNAING is discharged into the local watershed, which drains into the Scheldt River basin, ultimately reaching the North Sea.
As a French facility, ONNAING operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size to protect water quality.
Under the EU Urban Waste Water Treatment Directive, plants serving 8,500 people are classified as small to medium agglomerations and are required to provide secondary treatment, which typically involves biological processes to remove organic matter and nutrients.
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