Tetra Tech is a leader in developing innovative solutions to increase access to clean drinking water and address the most pressing sanitation and hygiene challenges in the developing world.

For more than 30 years, Tetra Tech has been a leading implementer of the U.S. Agency for International Development’s (USAID) WASH portfolio. Through our involvement with past and current flagship global programs—including Water, Sanitation, and Hygiene Partnerships and Learning for Sustainability (WASHPaLS), WASH Finance (WASH-FIN), and the Environmental Health Project (EHP)—we have contributed to improved health outcomes and reduced the incidence of waterborne illness in numerous countries across the globe.

Our in-house experts have helped transform the WASH sector using a holistic approach. Tetra Tech combines a focus on hardware solutions, such as water supply systems and improved sanitation facilities, with hygiene promotion through communication, social mobilization, and advocacy. This approach focuses on creating a healthy enabling environment that encourages financing access, policy improvement, community organization efficiency, and institutional strengthening. Tetra Tech formalized this approach in the development of the Hygiene Improvement Framework, which now is used by USAID as a platform for WASH programming around the world.

Our team has incorporated a wide array of innovative tools and cutting-edge technological solutions into our WASH projects to improve service delivery and strengthen monitoring and management systems. To support small-town and urban water suppliers, we use cloud-based data management and reporting systems to better track sales, seasonality trends, and other market forces. For example, in Senegal, GPS sensors installed on waste exhauster trucks assisted local authorities in monitoring points of congestion in the fecal sludge management supply chain. These solutions provide a foundation for improving service delivery and ensuring sustainability of our projects.

Tetra Tech is at the forefront of designing approaches—such as sanitation marketing and concession contracts with rural water supply operators—that foster innovative partnerships among government, consumers, and the private sector. Such approaches encourage individual and private sector investment, which contributes to closing the significant public sector funding gap that exists for expanding water and sanitation services.

Tetra Tech’s experts integrate WASH strategies for healthy, vibrant communities to help communities make progress towards the United Nations' Sustainable Development Goal (SDG) 6 target for universal access to water and sanitation by the year 2030.

Related Projects

Women lining up to get supplies for building their water supply system

Water Resources Integration Development Initiative (WARIDI) in Tanzania

Helping improve the management of water resources, increase agricultural yields, and promote resilient communities in the face of a changing climate

Gender mainstreaming and social inclusion across all WASH activities and engagements

Water, Sanitation, and Hygiene Partnerships and Learning for Sustainability (WASHPaLS)

Strengthening service delivery and accelerating behavior change by identifying and sharing best practices

Closing financial gaps for global water supply and sanitation services

Water, Sanitation, and Hygiene Finance (WASH-FIN)

Helping close financing gaps to achieve universal access to water and sanitation services

Afghanistan Sustainable Water Supply Sanitation

Afghanistan Sustainable Water Supply and Sanitation

Increasing access to clean and sustainable water distribution points and sanitation facilities to improve health and hygiene in Afghanistan

USAID acknowledges the SUWASA program’s work with countries such as Mozambique, Liberia, South Sudan, Kenya, and Nigeria

Sustainable Water and Sanitation in Africa (SUWASA)

Improving access to safe, reliable, affordable, and sustainable water and sanitation services for urban populations in sub-Saharan Africa