WICKHAM STW - Secondary Wastewater Treatment Plant in Wickham, Winchester

WICKHAM STW is a wastewater treatment plant located in Wickham, near Winchester, Hampshire, England. It serves a population of approximately 2,251 people, classifying it as a small agglomeration under UK and EU regulatory frameworks. The plant is situated near the coast, highlighting its role in protecting coastal water quality. The plant provides secondary treatment, which is the standard level required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for discharges to coastal waters. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant has a designed capacity of 2,251 m³/day and currently discharges 501.15 m³/day of treated effluent. The treated effluent from WICKHAM STW is discharged into the local catchment, which ultimately drains into the Solent and the English Channel. This coastal discharge requires careful management to protect sensitive marine ecosystems, including nearby estuaries and coastal habitats that support diverse aquatic life and migratory bird populations.

WICKHAM STW discharges treated wastewater into the local catchment that flows into the Solent, a strait separating the Isle of Wight from mainland England, and then into the English Channel. The Solent is an ecologically sensitive area supporting diverse marine life, including seagrass beds and important fish nurseries. The plant's coastal location necessitates effective treatment to minimize nutrient and pollutant loads that could impact these downstream environments.