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Integrating sustainability across our business

At Tetra Tech sustainability is an integral part of our global business, rooted in our internal culture, and extending throughout our projects around the world. For nearly 60 years we have leveraged cutting-edge expertise and the latest technology to deliver more sustainable solutions to clients and continually improve the way we do business.

Through our Sustainability Program, we monitor environmental, social, and governance (ESG) metrics, including human and social capital aspects. We continue to enhance the sustainability of our daily practices, reduce our greenhouse gas (GHG) emissions, and provide an exceptional working environment for our employees across our global operations.

IBD 2023 Best ESG Companies — Environmental, Social & Governance

Tetra Tech was ranked #1 for Human Capital and #2 for Environment in the Investor’s Business Daily 2023 Best ESG Companies special report.

Improving 1 billion lives around the world

Our 1 Billion People Challenge recognizes that Tetra Tech’s greatest impact on the world is through the 100,000 projects our scientists, engineers, and technical specialists perform each year in more than 100 countries.

We assess and report annually on project impacts and the associated benefits to people through five key metrics that are integral to the work we do.

Learn more about our 1 Billion People Challenge in our annual Sustainability Report.

Cumulative project impacts as of 2022


million people’s lives improved


megawatts (MW) of renewable energy identified, planned, or generated


million hectares (ha) of land and water ecosystems protected, managed, or restored


million metric tons (MT) of CO₂e avoided or captured


billion gallons of water treated, saved, or reused

Aligning with global best practices

Our project impact analysis is aligned with the Global Reporting Initiative (GRI) standards and the UN Sustainable Development Goals (SDGs), which measure social benefit and aim to reduce poverty in communities around the world.

Supporting responsible social and governance programsSDG 3, 4, 5, and 16
Increasing renewable energy generationSDG 7
Increasing biodiversity and restoring ecosystemsSDG 14 and 15
Reducing carbon emissionsSDG 13
Creating safe and sustainable water suppliesSDG 6

Learn more about our Sustainability Program

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ESG Resources

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