Tetra Tech Wins $105 Million EPA Watershed Assessment and Protection BPA

Tetra Tech, Inc. (NASDAQ: TTEK), a leading provider of high-end consulting and engineering services, announced today that the U.S. Environmental Protection Agency (EPA) Office of Water awarded the Company a five-year, $105 million Blanket Purchase Agreement (BPA) to restore and protect watersheds and water bodies throughout the United States.

Tetra Tech will identify, analyze, and evaluate surface water and coastal ecosystems to protect human health and aquatic environments from the impacts of pollution and the effects of climate change, including ocean acidification. Tetra Tech’s scientists will design monitoring programs, develop predictive models, and prepare technical guidance documents to assess chemical, physical, and biological integrity of water bodies. Our technical specialists will analyze model results and manage spatial datasets to develop effective management strategies for inland and coastal regions impacted by land-use related activities, stormwater and runoff, habitat loss, and invasive species.

“Tetra Tech has supported EPA’s Office of Water in developing science-based solutions for more than 40 years,” said Dan Batrack, Tetra Tech Chairman and CEO. “This is Tetra Tech’s tenth consecutive EPA watershed management contract, supporting EPA in analytics, guidance, and training associated with the development and execution of watershed protection programs. We are pleased to continue using our Leading with Science^® approach and Tetra Tech Delta technologies to assess and protect water bodies throughout the United States.”

About Tetra Tech

Tetra Tech is a leading provider of high-end consulting and engineering services for projects worldwide. With 27,000 employees working together, Tetra Tech provides clear solutions to complex problems in water, environment, sustainable infrastructure, renewable energy, and international development. We are Leading with Science^® to provide sustainable and resilient solutions for our clients. For more information about Tetra Tech, please visit tetratech.com or follow us on LinkedIn, Twitter, 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.

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