UWWTP Katwijk - Wastewater Treatment Plant in Katwijk, Netherlands

UWWTP Katwijk is a municipal wastewater treatment plant located in Katwijk, a coastal town in the province of Zuid-Holland, Netherlands. The plant serves a population of approximately 101,400, classifying it as a large agglomeration under EU regulations. As a large agglomeration, the plant is required to meet secondary treatment standards under the EU Urban Waste Water Treatment Directive (91/271/EEC). Given the Netherlands' extensive water management infrastructure, the plant likely employs advanced treatment processes to protect sensitive receiving waters. The designed capacity is 1.00 (likely in million cubic meters per year or similar unit), indicating a substantial facility. The plant discharges treated effluent into the local water system, which ultimately drains into the North Sea. The Netherlands' low-lying geography and dense population make wastewater treatment critical for protecting both inland waterways and coastal marine environments. The plant plays a key role in maintaining water quality in the Rhine-Meuse-Scheldt delta region.

The treated effluent from UWWTP Katwijk eventually reaches the North Sea via local canals and rivers, contributing to the overall water quality of the Dutch coastal zone. The North Sea is a productive marine ecosystem supporting fisheries and migratory bird populations. The plant's location near the coast means that nutrient removal is important to prevent eutrophication in coastal waters.