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Tetra Tech’s greatest impact on the world is through the projects we perform in communities around the globe. In partnership with our clients, we are improving lives and creating a more sustainable future.

A landscape shot of rice farmers in a field harvesting conservation-friendly rice

Transforming Market Systems in Cambodia’s Protected Areas

Aerial view of the partially below grade 4.0 MGD Serrano Water District PFAS Plant showing the exterior screen walls

Designing Per-and Polyfluoroalkyl Substances (PFAS) Treatment Facilities

Open dump site with large pile of waste and plastic pollution next to an ecologically significant landscape

Preventing Ocean Plastic Pollution through Sustainable Waste Management

Tetra Tech Hydrologist Casey O’Farrell undertaking groundwater measurement inside Melbourne Metro Tunnel construction site

Advancing Sustainable Public Transport Design to Reduce Carbon Emissions in Melbourne

Students sit at their desks in a new SEED Urban classroom at the newly expanded Kawale school

Expanding Access to Secondary Education and Improving Youth Livelihoods in Malawi

Aerial view of water treatment plant in Northern Ireland

Supporting Delivery of Safe Water across Northern Ireland

Tetra Tech team members sitting at a table with council members discussing strategic development and action plans

Realizing Effective and Accountable Local Governments in Georgia

Group photo of participants at a CARPE Implementing Partner Meeting in Kinshasa

Strengthening Conservation of Forests and Biodiversity in Central Africa

Landscape view of the Los Angeles skyline at sunset

Developing a Building Decarbonization Plan for City of Los Angeles

Forest officers at a familiarization session on the Van System in a forest setting in Kerala

Strengthening Forest Management in India through Partnership and Technology

A man shares results of the mapping and demarcation process in East Bale Zone with a small group

Strengthening Pastoral and Urban Land Rights in Ethiopia

A person holding a tool in front of a recently harvested cocoa from a regenerated plantation, Pokola, Republic of Congo

Promoting Green Markets to Conserve Biodiversity in the Republic of Congo

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