Tetra Tech helps its clients integrate green infrastructure to effectively meet stormwater management goals at the lowest cost and most benefit to the community.

Tetra Tech helped pioneer the concept of green infrastructure during the 1990s and has continued to provide cutting-edge approaches as the focus of stormwater management has evolved to meet regulatory and environmental goals. Our engineers have developed innovative modeling and decision-support tools to optimize green infrastructure sizing and placement to strategically and effectively manage stormwater quantity and quality.

Our recent innovations with green infrastructure master planning leverage these powerful analytical tools and high-resolution data to develop integrated, site-scale concepts across large urban areas. Tetra Tech’s green infrastructure master planning approach provides clients with the information to make cost-based decisions while demonstrating clear linkage to watershed-scale regulatory requirements. We help clients use their resources more efficiently, maximize water quality and quantity benefits, and integrate green infrastructure with other capital improvement projects and programs to realize significant cost saving and community co-benefits.

Our leadership in developing decision-support tools, engineering design expertise, and in-depth, practical understanding of the complex challenges facing our clients allows us to provide full lifecycle support. Our experience encompasses all aspects of green infrastructure, from planning through design, construction, and post-construction evaluations. We work closely with our clients to prepare practical and achievable green infrastructure strategies that are scientifically defensible and accurately evaluate the technical, economic, institutional, and regulatory feasibility for meeting management goals.

Our far-reaching network of experts allows us to provide the best of local experience and understanding combined with lessons learned from planning, designing, and constructing hundreds of successful green infrastructure projects. We also are helping clients address and integrate emerging issues including operation and maintenance, triple-bottom-line benefits, climate change resiliency, biodiversity, and urban agricultural.

Program Development and Planning

  • Site identification, evaluation, and prioritization
  • Integrated watershed master planning
  • Optimization modeling
  • Training and certification
  • Design manual development
  • Code and ordinance development, review, and revision
  • Incentives program development


  • Design standards and sizing criteria development
  • Conceptual through full design
  • Cost estimates
  • Design plans and specs
  • Operation and maintenance guidance

Construction and Evaluation

  • Construction management and inspection
  • Post-construction monitoring
  • Effectiveness assessment