Slough Sewage Treatment Works upgrade, UK

Name of the Project
Slough Sewage Treatment Works (STW) upgrade.
Location
UK.
Project Owner/s
Water utility Thames Water.
Project Description
The upgrade is designed to meet updated environment agency wastewater quality standards while improving operational efficiency.
Key enhancements include expanding treatment capacity to comply with more stringent quality permits, such as a reduction in ammonia and phosphorous, and a storm permit by improving the management of high-strength return flows. All encompassed within a new power supply and standby systems to bolster resilience and sustainability.
Once the works are completed, the watercourses will transform into cleaner and healthier ecosystems.
Potential Job Creation
Not disclosed.
Capital Expenditure
£80-million.
Planned Start/End Date
Design for the scheme started in November 2025, with construction scheduled to start an estimated 15 months thereafter.
Latest Developments
None stated.
Key Contracts, Suppliers and Consultants
None stated.
Contact Details for Project Information
Thames Water, tel + 44 845 920 0888.
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