Tetra Tech, Inc. (NASDAQ: TTEK), a leading provider of high-end consulting and engineering services, announced today the release of our 2024 Sustainability Report on Earth Day. Tetra Tech is Leading with Science^® to advance our commitment to improve the lives of 1 billion people around the world by 2030. We have positively impacted 625 million people, an increase of 80 million from the prior year, through innovative solutions that create sustainable water supplies, reduce carbon emissions, generate renewable energy, restore biodiversity, and support social and governance programs.

Our 2024 Sustainability Report details how Tetra Tech is Leading with Science to drive progress on our environmental, social, and governance (ESG) goals that align with our ongoing commitment to the United Nations (UN) Global Compact, UN Sustainable Development Goals, and Science Based Targets Initiative. Our comprehensive greenhouse gas reporting saw a decrease in emissions per employee (Scope 1 and 2) of 6.9 percent from our 2021 baseline.

We are committed to a diverse and inclusive culture where our employees can thrive and achieve their full potential, and track our progress toward workforce gender balance, racial and ethnic diversity, employee engagement, and professional development goals. In 2023 we reported a 12 percent increase in women in management and a 7 percent increase in employees of color.

Our employees participated over 200,000 times in Tetra Tech-sponsored professional development training in new technologies and leadership development. Our award-winning health and safety program continues to be best-in-class, with metrics 73 percent better than industry standards.

“Tetra Tech is committed to using our Leading with Science approach to produce sustainable solutions that help mitigate climate change and create more resilient communities,” said Dan Batrack, Tetra Tech Chairman and CEO. “Our water projects have resulted in the treatment of over 4.75 trillion gallons of water for both traditional and emerging contaminants, such as PFAS.”

Tetra Tech’s Chief Innovation and Sustainability Officer, Dr. Leslie Shoemaker, said, “We demonstrate our commitment to sustainability every day across over 100,000 projects in more than 100 countries. Our innovative solutions have significantly contributed to mitigating climate change by reducing GHG emissions by more than 153 million metric tons of CO₂e.”

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.

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