Pasadena, California. Tetra Tech, Inc. (NASDAQ: TTEK) announced today that it was awarded over $30 million in new contracts to develop water infrastructure for local governments. Each of the eight new contracts that make up this work begins immediately, and will be completed within the next one to three years. In addition to these eight awards, Tetra Tech has received an increased number of water infrastructure projects nationwide in the last three months.

These contracts include planning, engineering design and construction management of water treatment and supply systems. Work will be performed for the following eight local governments: Marysville, WA; Snohomish County, WA; Seattle, WA; Highlands Ranch, CO; Standley Lake, CO; Aurora, CO; Broomfield, CO; Boone County, KY.

About Tetra Tech
Tetra Tech is a leading provider of specialized management consulting and technical services in three principal business areas: resource management, infrastructure and communications. The Company's clients include a diverse base of public and private sector organizations serviced through more than 150 offices located in the United States and internationally.

Certain statements contained in this news release are forward-looking statements that involve risks and uncertainties, such as those related to the Company's acquisition strategy and the fluctuations in the Company's quarterly operating results and stock price, and the other risks detailed from time to time in the Company's SEC reports.