Overview
UWWTP Stompwijk in Leidschendam, Zuid-Holland, Netherlands, is a closed advanced treatment plant with a designed capacity of 1980 m³/day. It served the local community before decommissioning.
UWWTP Stompwijk is a former wastewater treatment plant located in the Stompwijk area of Leidschendam, within the municipality of Leidschendam-Voorburg in the province of Zuid-Holland, Netherlands. The plant was designed with a capacity of 1980 cubic meters per day and provided advanced treatment, reflecting the high standards of Dutch wastewater management. Although the plant is now closed, its operation was governed by the European Union's Urban Waste Water Treatment Directive (91/271/EEC), which sets stringent requirements for nutrient removal in sensitive areas. The Netherlands, being a densely populated and water-rich country, has extensive wastewater infrastructure to protect its waterways. The plant's discharge would have entered the local water system, ultimately draining into the North Sea via the Rhine-Meuse-Scheldt delta. This region is ecologically significant, supporting diverse aquatic life and serving as a critical migratory corridor for fish and birds.
Environmental context
The plant is situated in the Rhine-Meuse-Scheldt delta, a complex network of rivers and canals that drains into the North Sea. This delta is ecologically sensitive, supporting diverse aquatic habitats and serving as a vital stopover for migratory birds. The advanced treatment level would have helped reduce nutrient loads, protecting downstream water quality in a region known for intensive agriculture and urban development.
Frequently asked questions
UWWTP Stompwijk is located in the Stompwijk area of Leidschendam, in the municipality of Leidschendam-Voorburg, Zuid-Holland province, Netherlands.
The plant had a designed capacity of 1980 cubic meters per day and provided advanced treatment, which includes nutrient removal beyond secondary treatment.
The plant is listed as closed, likely due to consolidation of wastewater services or upgrades to larger regional facilities, which is common in the Netherlands to improve efficiency and meet stricter environmental standards.
Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants in sensitive areas must provide advanced treatment. The Netherlands designates many water bodies as sensitive, requiring nutrient removal to protect the North Sea and inland waters.
The delta is a major European ecosystem, supporting diverse fish, bird, and plant species. It acts as a natural water filter and flood buffer, and its health depends on controlling nutrient pollution from wastewater and agriculture.
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