CAISTOR STW - Secondary Wastewater Treatment in West Lindsey, Lincolnshire

CAISTOR STW is a municipal wastewater treatment plant located on Navigation Lane in Caistor, West Lindsey, Lincolnshire, England. The facility serves a population of around 3,800 and operates under the regulatory framework of the United Kingdom, which implements the EU Urban Waste Water Treatment Directive (91/271/EEC) for secondary treatment standards. The plant provides secondary treatment, a standard level required for inland freshwater discharges under UK regulations. With a designed capacity of 9,728 cubic meters per day and an average discharge volume of 845.79 cubic meters per day, the facility operates well within its capacity, ensuring effective treatment of local wastewater. Treated effluent from CAISTOR STW is discharged into nearby watercourses that flow into the River Ancholme or the River Bain, eventually reaching the Humber Estuary and the North Sea. The plant plays a key role in protecting the water quality of these rivers and the downstream estuarine and marine environments.

CAISTOR STW discharges into local streams that feed into the River Ancholme or River Bain, both part of the Humber River Basin. The Humber Estuary is a major ecological feature supporting diverse bird populations and fish species. The plant's secondary treatment helps reduce organic pollutants and nutrients, safeguarding the aquatic ecosystem in the rivers and the estuary.