Chester STW, Chester | United Kingdom Wastewater

Overview

Chester STW serves approximately 117,000 people in Chester, England. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive.

Chester STW is a wastewater treatment plant serving the historic city of Chester in Cheshire West and Chester, England. With a population served of around 117,000, it is classified as a large agglomeration under UK regulations. As a plant of this scale, Chester STW is expected to provide secondary treatment as a minimum, with tertiary treatment likely required due to the sensitivity of the receiving environment. The plant's designed capacity is 1.00 (likely in megalitres per day or similar units), indicating a substantial infrastructure to handle the region's wastewater. The treated effluent is discharged into the River Dee, which flows through Chester and into the Dee Estuary, a site of ecological importance. The estuary supports diverse bird life and is a key part of the local ecosystem, ultimately draining into the Irish Sea.

Environmental context

Chester STW discharges into the River Dee, which flows through the city and into the Dee Estuary, an ecologically sensitive area supporting migratory birds and diverse aquatic life. The estuary drains into the Irish Sea, making the plant's treatment performance critical for both freshwater and marine environments.

Frequently asked questions

Chester STW is located in Chester, Cheshire West and Chester, England, near the River Dee.

Chester STW serves approximately 117,000 people, classifying it as a large agglomeration under UK wastewater regulations.

Treated wastewater from Chester STW is discharged into the River Dee, which flows into the Dee Estuary and then the Irish Sea.

Chester STW operates under the UK's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for large agglomerations and may mandate tertiary treatment in sensitive areas.

For a plant of this size in the UK, secondary treatment is standard, with tertiary treatment often required to protect sensitive water bodies like the Dee Estuary.