Tetra Tech Awarded $113 Million Contract to Support EPA’s Watershed Protection Program

PASADENA, Calif.–(BUSINESS WIRE)–Tetra Tech, Inc. (NASDAQ: TTEK) announced today that it has been awarded
a five-year, $113 million contract to provide technical support services
for the U.S. Environmental Protection Agency (EPA) Office of Water.
Under this multiple-award contract, Tetra Tech will support the EPA
Office of Water’s Assessment and Watershed Protection Division in its
efforts to assess and monitor water quality conditions, develop
comprehensive tools to promote watershed protection, study point and
nonpoint source pollution, and develop strategies for ecosystem
restoration.

Tetra Tech will provide technical services to support the EPA’s mission
in meeting the broad requirements under the Clean Water Act which affect
rivers, lakes, streams, wetlands, and coastal waters in the United
States. These services include the development of water quality and
economic models, preparation of technical guidance documents and
analytical methods, and development of innovative management strategies
to protect and reuse watershed. Tetra Tech will work with EPA regions,
states, and other stakeholders on data analytics and the interpretation
of water quality, land-use, and spatial data.

“Tetra Tech’s scientists and researchers have supported EPA’s watershed
management programs continuously since 1989,” said Dan Batrack, Tetra
Tech Chairman and CEO. “We are pleased to continue developing innovative
tools for EPA that advance the science of watershed assessment and
protection of our nation’s water resources.”

About Tetra Tech

Tetra Tech is a leading, global provider of consulting and engineering
services. We are differentiated by Leading with Science^®
to provide innovative technical solutions to our clients. We support
global commercial and government clients focused on water, environment,
infrastructure, resource management, energy, and international
development. With 16,000 associates worldwide, Tetra Tech provides clear
solutions to complex problems. For more information about Tetra Tech,
please visit tetratech.com,
follow us on Twitter (@TetraTech),
or like us on Facebook.

Any statements made in this release that are not based on historical
fact are forward-looking statements. Any forward-looking statements made
in this release represent management’s best judgment as to what may
occur in the future. However, Tetra Tech’s actual outcome and results
are not guaranteed and are subject to certain risks, uncertainties and
assumptions (“Future Factors”), and may differ materially from what is
expressed. For a description of Future Factors that could cause actual
results to differ materially from such forward-looking statements, see
the discussion under the section “Risk Factors” included in the
Company’s Form 10-K and 10-Q filings with the Securities and Exchange
Commission.

Contacts

Tetra Tech, Inc.
Jim Wu, Investor Relations
Charlie
MacPherson, Media & Public Relations
(626) 470-2844