Pasadena-based consulting and engineering services firm Tetra Tech Inc., announced on Sept. 1 that it received a five-year, $100 million contract from the U.S. Environmental Protection Agency to assess human health and ecological risks associated with global climate change.

Under the contract from the EPA’s Office of Research and Development, Tetra Tech will provide technical support services to assess the ability of ecosystems to adapt to varying conditions from factors such as climate change, urbanization, and habitat loss.

Specifically, Tetra Tech’s scientists and engineers will develop predictive models for various climate scenarios including sea-level rise, storm surges, and threats to drinking water supplies. They will then analyze model results and create interactive, web-based geographic information system displays to facilitate the use and sharing of information for effective decision-making.

“Tetra Tech has supported EPA’s Office of Research and Development in developing science-based solutions for more than 15 years,” Dan Batrack, Tetra Tech’s chief executive, said in the announcement.

Previous contracts have included analysis and modeling for the EPA on watersheds, Superfund cleanup sites and various other technical and engineering services.

“We are pleased to continue using our ‘Leading with Science’ approach and Tetra Tech Delta technologies to assess global climate change impacts and develop adaptation strategies to strengthen the resilience of ecosystems and human health,” Batrack added.

The EPA contract award announcement did little to sway investors, as Tetra Tech shares closed Sept. 1 down 1% to $134.30. The share price has been trending mostly down since peaking in early August after an earnings report that exceeded analyst expectations.