Tetra Tech has been ranked #1 in Water by Engineering News-Record magazine for 18 years in a row. Tetra Tech helps provide access to safe, abundant water supplies; effective treatment of stormwater and wastewater; flood control and restoration tools; and innovative watershed protection approaches to assess, protect, and restore our water bodies. Our potable water services help protect public health and improve quality of life. Tetra Tech is involved in all phases of the water cycle, combining state-of-the-art techniques and demonstrated best practices.