Exhibit 23.1

 

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

 

We hereby consent to the incorporation by reference in this Post-Effective Amendment No. 2 to the Registration Statement on Form S-8 of Tetra Tech, Inc. of our report dated November 20, 2015 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in Tetra Tech, Inc.’s Annual Report on Form 10-K for the year ended September 27, 2015.

 

/s/ PRICEWATERHOUSECOOPERS LLP
PricewaterhouseCoopers LLP
Los Angeles, California
May 5, 2016