Tetra Tech Receives Award for Innovative PFAS Water Treatment Program

Contacts

Jim Wu, Investor Relations

Charlie MacPherson, Media & Public Relations

(626) 470-2844

Tetra Tech, Inc. (NASDAQ:TTEK), a leading provider of high-end consulting and engineering services, received the Environmental Business Journal (EBJ) Project Merit Award for our work with the City of Dayton, Ohio, to address proposed regulations for per- and polyfluoroalkyl substances (PFAS) in the City’s water supply.

Dayton’s advanced water treatment facility will be the largest PFAS treatment facility in the United States once constructed and is part of a $400 million master plan to address water system asset management needs. The strategy includes expanding pumping and recharge, installing an interconnect between two treatment plants, and installing PFAS treatment. Tetra Tech is planning and designing more than $200 million in total improvements to address emerging contaminants and maintain a high-quality water source for the region. The program has received funding through the bipartisan infrastructure law, or IIJA.

“Tetra Tech is honored to be recognized for using our Leading with Science^® approach to help our clients address their most complex challenges,” said Dan Batrack, Tetra Tech Chairman and CEO. “We thank our clients for their continued confidence in our performance and recognize our 28,000 employees for their dedication to technical excellence.”

In addition to the PFAS Project Merit Award, Tetra Tech received four additional awards for excellent performance, innovation, and industry leadership in climate change, environment, and sustainable infrastructure. The annual awards from EBJ and Climate Change Business Journal (CCBJ) were presented at the Environmental Industry Summit XXII on April 3, 2024, in San Diego, California.

The additional awards included the following:

CCBJ Consulting & Engineering Award for Climate Change Adaptation & Resilience for using technology to reduce deforestation and strengthen forest management in India
CCBJ Project Merit Award for Climate Change Resilient Infrastructure for helping reduce embodied carbon and sequester carbon over the life cycle of Western Australia’s largest mass-engineered timber building
EBJ Business Achievement Award: Large Firms for an exceptionally strong 2023 fiscal year in which the Company achieved records for key financial metrics
EBJ Diversity & Inclusion Award for fostering inclusivity and diversity, and supporting development of employees from historically marginalized groups

About Tetra Tech

Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide. With 28,000 employees working together, Tetra Tech provides clear solutions to complex problems by Leading with Science^® to address the entire water cycle, protect and restore the environment, design sustainable and resilient infrastructure, and support the clean energy transition. For more information about Tetra Tech, please visit tetratech.com or follow us on LinkedIn and Facebook.

Any statements made in this release that are not based on historical fact are forward-looking statements. Any forward-looking statements made in this release represent management’s best judgment as to what may occur in the future. However, Tetra Tech’s actual outcome and results are not guaranteed and are subject to certain risks, uncertainties and assumptions (“Future Factors”), and may differ materially from what is expressed. For a description of Future Factors that could cause actual results to differ materially from such forward-looking statements, see the discussion under the section “Risk Factors” included in the Company’s Form 10-K and Form 10-Q filings with the Securities and Exchange Commission.