April 13, 2007 (The Woodlands, Texas), TETRA Technologies, Inc. (TETRA or the Company) (NYSE:TTI) will be releasing first quarter 2007 results on Monday, May 7, 2007, and will be hosting a conference call at 10:30 a.m. ET on that day to discuss the results. The phone number for the call is 877/407-8033. The call will also be available by live audio webcast and may be accessed through the Company website, www.tetratec.com, or through www.InvestorCalendar.com. Geoffrey M. Hertel, Chief Executive Officer, Stuart M. Brightman, Chief Operating Officer, and Joseph M. Abell, Chief Financial Officer, will host the call. The press release and its accompanying financial exhibits will be available on the Company website prior to the conference call. A replay of the call will be available at 877/660-6853 replay passcode account no. 286, conference ID 238804, for one week following the call. The archived webcast will be available through the Company website for thirty days following the call.

TETRA is an oil and gas services company, including an integrated calcium chloride and brominated products manufacturing operation that supplies feedstocks to energy markets, as well as other markets.