Tetra Tech Awarded £17 Million Water Engineering Design Contract

Tetra Tech, Inc. (NASDAQ: TTEK), a leading provider of high-end consulting and engineering services in water, environment, and sustainable infrastructure, announced today that Portsmouth Water selected Tetra Tech to provide engineering design and technical support to deliver resilient water service to its customers in Southern England and advance their programs to meet new regulatory targets.

Tetra Tech’s water engineers will design high-end solutions to improve critical infrastructure including reservoirs, pipes, and treatment plants that serve more than 700,000 people. Our experts will provide strategic advisory services to modernize water delivery networks and implement advanced asset management systems. This work builds on more than a decade of using our WaterNet digital platform to support network maintenance and leakage analytics for Portsmouth Water.

“Tetra Tech has supported clients around the world to provide resilient water supplies for their communities and businesses,” said Dan Batrack, Tetra Tech Chairman and CEO. “We are pleased to use our Leading with Science^® approach and innovative digital solutions to partner with Portsmouth Water to deliver this significant program that will provide a state-of-the-art sustainable water supply for their community.”

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 30,000 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, and design sustainable and resilient infrastructure. 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.

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