AECOM selected as exclusive design partner to support a £340 million upgrade of Thames Water’s Oxford Sewage Treatment Works in the UK

Key Terms

effluent technical

Effluent is the liquid discharge that flows out of factories, treatment plants, or other facilities after industrial or municipal processes; think of it as the used water a business releases back into rivers, lakes or sewers. It matters to investors because its composition and management affect a company’s legal compliance, cleanup costs, permit status and public reputation—factors that can influence operating costs, fines, and long-term value.

ai-enabled technical

AI-enabled describes a product, service, or process that uses artificial intelligence—software that learns from data and makes decisions or predictions—as a core feature rather than a minor add-on. For investors it matters because AI-enabled offerings can boost productivity, lower costs or unlock new revenue streams; like adding a smart autopilot to a routine task, they can change a company's growth potential and competitive edge while also bringing higher upfront investment needs and distinct regulatory or ethical risks.

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

AECOM will support Thames Water, the UK's largest water and wastewater service provider, to deliver this scheme as part of the AMP8 capital investment program

DALLAS--(BUSINESS WIRE)-- AECOM (NYSE: ACM), the trusted global infrastructure leader, today announced that it has been appointed by Murphy as its design partner to deliver Thames Water’s major upgrade of the Oxford Sewage Treatment Works in the UK. With AECOM appointed as the contractor’s exclusive design partner for multidisciplinary design services, the upgrade will increase treatment capacity by approximately 40% while supporting population growth and protect the environment by further improving effluent quality that goes into the River Thames at the end of the sewage treatment cycle.

The upgrade is a key part of Thames Water’s capital deliver works program during AMP8, the UK’s current Asset Management Period 8 (AMP8). The approximately £340 million scheme also includes upgrading power supplies and increasing storm tank capacity and sewage treatment flows.

“Upgrading these major sewage treatment works is critical for facilitating growth and protecting the environment for communities in Oxfordshire,” said Beverley Stinson, chief executive of AECOM’s global Water business. “AECOM is the world’s number one water design firm as ranked by Engineering News-Record, and we are proud to bring our global technical excellence to support Thames Water in providing a significant increase in treatment capacity. Key to success is harnessing our world-leading technology and AI-enabled solutions to deliver more efficient, resilient, and sustainable infrastructure for the future.”

“AECOM continues to strengthen its position in the UK water market, and we look forward to helping deliver cleaner waterways for communities in Oxfordshire and beyond,” said Richard Whitehead, chief executive of AECOM’s Europe and India region. “Building on our proud legacy as a trusted partner to the industry, this award reinforces our longstanding relationship with Thames Water. By continuing our successful collaboration with Murphy, we are bringing together the best skills and expertise to help Thames Water enhance its services for customers.”

“This upgrade to Oxford Sewage Treatment Works represents a significant investment in the long-term resilience and environmental performance of our wastewater network,” said David Mayfield, Senior Project Manager at Thames Water. “By working closely with AECOM and our delivery partner Murphy, we’re ensuring that Oxfordshire’s growing communities benefit from an upgraded, future-ready treatment facility that safeguards our waterways, enhances capacity and provides a resilient wastewater service, with fewer storm overflows for years to come.”

AECOM previously delivered Thames Water’s Deephams Sewage Treatment Works upgrade in a joint venture with Murphy and Kier, which is one of London’s largest wastewater treatment plants. This latest win builds on AECOM's key wins related to the AMP8 UK water infrastructure framework, including supporting Thames Water’s approximately $540 million professional services framework and Southern Water’s $4.8 billion capital delivery program.

About AECOM
AECOM (NYSE:ACM) is the global infrastructure leader, committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities, we solve our clients’ complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2025. Learn more at aecom.com.

About Thames Water
Thames Water is the UK’s biggest water and wastewater services provider. Our key workers provide essential services around the clock to c.16 million customers across London, the Thames Valley, and surrounding areas. We provide 2.7 billion litres of drinking water and safely remove 4.6 billion litres of wastewater every day. We invested £2.2 billion in 2024/25, and we will continue to spend wisely on improving resilience, service, and efficiency, as well as provide more support for customers in vulnerable circumstances. We also have additional responsibilities to society and the natural environment. What we do and how we do it delivers significant public value, which is why we have ambitious plans to self-generate more of our own power, reduce our carbon emissions and increase biodiversity across our sites.

Forward-Looking Statements
All statements in this communication other than statements of historical fact are “forward-looking statements” for purposes of federal and state securities laws, including any statements of the plans, strategies and objectives for future operations, profitability, strategic value creation, capital allocation strategy including stock repurchases, risk profile and investment strategies, and any statements regarding future economic conditions or performance, and the expected financial and operational results of AECOM. Although we believe that the expectations reflected in our forward-looking statements are reasonable, actual results could differ materially from those projected or assumed in any of our forward-looking statements. Important factors that could cause our actual results, performance and achievements, or industry results to differ materially from estimates or projections contained in our forward-looking statements include, but are not limited to, the following: our business is cyclical and vulnerable to economic downturns and client spending reductions; potential government shutdowns, changes in administration or other funding directives and circumstances that may cause governmental agencies to modify, curtail or terminate our contracts; losses under fixed-price contracts; limited control over operations that run through our joint venture entities; liability for misconduct by our employees or consultants; changes in government laws, regulations and policies, including failure to comply with laws or regulations applicable to our business; maintaining adequate surety and financial capacity; potential high leverage and inability to service our debt and guarantees; ability to continue payment of dividends; exposure to political and economic risks in different countries, including tariffs and trade policies, geopolitical events, and conflicts; inflation, currency exchange rates and interest rate fluctuations; changes in capital markets and stock market volatility; retaining and recruiting key technical and management personnel; legal claims and litigation; inadequate insurance coverage; environmental law compliance and adequate nuclear indemnification; unexpected adjustments and cancellations related to our backlog; partners and third parties who may fail to satisfy their legal obligations; managing pension costs; AECOM Capital real estate development projects; cybersecurity issues, IT outages and data privacy; risks associated with the benefits and costs of the sale of our Management Services and self-perform at-risk civil infrastructure, power construction and oil and gas businesses, including the risk that any purchase adjustments from those transactions could be unfavorable and result in any future proceeds owed to us as part of the transactions could be lower than we expect; as well as other additional risks and factors that could cause actual results to differ materially from our forward-looking statements set forth in our reports filed with the Securities and Exchange Commission. Any forward-looking statements are made as of the date hereof. We do not intend, and undertake no obligation, to update any forward-looking statement.

View source version on businesswire.com: https://www.businesswire.com/news/home/20260706976359/en/

Investor Contact:
Will Gabrielski
Senior Vice President, Finance, Treasurer
213.593.8208
William.Gabrielski@aecom.com

Media Contact:
Brendan Ranson-Walsh
Senior Vice President, Global Communications
213.996.2367
Brendan.Ranson-Walsh@aecom.com

Source: AECOM