East Markham STW - Secondary Wastewater Treatment Plant in Bassetlaw, Nottinghamshire

East Markham STW (Sewage Treatment Works) is a municipal wastewater facility located on Quakefield Road in East Markham, Bassetlaw, Nottinghamshire, within the East Midlands region of England. The plant serves a population of approximately 3,610 and operates under the regulatory framework of the UK Environment Agency, which enforces discharge permits under the Water Resources Act 1991 and the Environmental Permitting Regulations. The plant provides secondary treatment, a standard level for small agglomerations in the UK, ensuring that organic matter and suspended solids are substantially reduced before discharge. With a designed capacity of 13,000 m³/day, the current discharge volume of 803.71 m³/day indicates significant spare capacity, allowing for future population growth or seasonal variations. The treated effluent is discharged into local rivers that ultimately drain into the River Trent catchment, a major tributary of the Humber Estuary. This catchment supports diverse aquatic life and is important for migratory fish species. The plant's inland location, over 50 km from the coast, reduces direct marine impact, but its discharge contributes to the overall water quality of the Trent basin.

The plant discharges into local watercourses that flow into the River Trent, which drains into the Humber Estuary and then the North Sea. The Trent catchment supports diverse aquatic ecosystems, including fish populations such as salmon and eels. The Humber Estuary is a major ecological feature, providing habitat for migratory birds and fish. The plant's secondary treatment helps protect these downstream environments from organic pollution.