Overview
Plymouth Central STW serves approximately 125,000 people in Plymouth, England. The plant discharges treated wastewater into the English Channel via Plymouth Sound, a key coastal ecosystem.
Plymouth Central STW is a major wastewater treatment facility located on Grand Parade in West Hoe, Plymouth, England. Serving a population of around 125,139, it is a large agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment as a minimum and tertiary treatment in sensitive areas. The plant's designed capacity is 1.00 (likely in megaliters per day or equivalent), indicating its scale to handle the city's wastewater. As a coastal plant within 50 km of the coast, Plymouth Central STW operates under the UK's regulatory framework, which implements the EU UWWTD through the Urban Waste Water Treatment (England and Wales) Regulations. For a population of this size, the plant is expected to provide at least secondary treatment, with potential nutrient removal to protect the marine environment. The plant's discharge is regulated by the Environment Agency under permits that set limits on pollutants. The treated effluent from Plymouth Central STW is discharged into Plymouth Sound, a large natural harbor that connects to the English Channel. Plymouth Sound supports diverse marine life, including seagrass beds and important fish nurseries. The plant plays a crucial role in protecting this coastal ecosystem from nutrient pollution and pathogens, ensuring water quality for recreation and wildlife.
Environmental context
Plymouth Central STW discharges into Plymouth Sound, which flows into the English Channel, a major shipping route and ecologically rich marine area. The Sound is a designated Site of Special Scientific Interest (SSSI) and supports habitats for seabirds, seals, and various fish species. The plant's treatment helps prevent eutrophication and maintains water quality in this sensitive coastal environment.
Frequently asked questions
Plymouth Central STW is located at Grand Parade, West Hoe, Plymouth, England, PL1 3DJ, United Kingdom, near the coast of Plymouth Sound.
The plant serves approximately 125,139 people, classifying it as a large agglomeration under the EU Urban Waste Water Treatment Directive.
The plant discharges treated effluent into Plymouth Sound, which connects to the English Channel, a coastal marine environment.
The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), enforced by the Environment Agency, which mandates secondary treatment for large agglomerations.
For a population of this size, UK regulations require at least secondary treatment, and often tertiary treatment with nutrient removal to protect sensitive coastal waters like Plymouth Sound.
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