Overview
UWWTP Leiden Zuidwest serves approximately 79,000 people in Leiden, Netherlands. The plant operates under the EU Urban Waste Water Treatment Directive, ensuring compliance with secondary treatment standards for inland discharge.
UWWTP Leiden Zuidwest is a municipal wastewater treatment facility located in Leiden, Zuid-Holland, Netherlands. Serving a population of around 79,000, it is classified as a medium agglomeration under EU regulations. The plant is situated in the Rhine-Meuse-Scheldt delta region, an area characterized by dense population and intensive water management. As a Dutch treatment plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size discharging into inland waters. The Netherlands enforces stringent nutrient removal standards to protect sensitive water bodies. The plant's designed capacity is 1.00 (likely in million cubic meters per year or similar unit), indicating a facility sized for its service population. The treated effluent is discharged into the local water system, which ultimately drains into the North Sea via the Rhine-Meuse delta. This region supports diverse aquatic ecosystems and is critical for migratory fish species. The plant plays a key role in maintaining water quality in the densely populated and agriculturally intensive province of Zuid-Holland.
Environmental context
The plant discharges into the Rhine-Meuse delta, a complex network of rivers and canals that flows into the North Sea. This watershed supports ecologically sensitive areas, including freshwater tidal wetlands and important bird habitats. Nutrient and pollutant loads from urban runoff and agriculture are managed through advanced treatment to protect downstream ecosystems and coastal waters.
Frequently asked questions
UWWTP Leiden Zuidwest is located in Leiden, Zuid-Holland, Netherlands, at Voorschoterweg in the Fortuinwijk district.
The plant serves approximately 79,067 people, classifying it as a medium-sized agglomeration under EU regulations.
The treated effluent is discharged into the local water system, which is part of the Rhine-Meuse delta, ultimately flowing into the North Sea.
As a Dutch plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations over 15,000 population equivalent discharging into inland waters.
Plants of this scale in the Netherlands typically employ secondary treatment with nutrient removal (nitrogen and phosphorus) to meet stringent EU and national standards for protecting sensitive water bodies.
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