Tetra Tech (NASDAQ:TTEK) reported quarterly earnings of $0.33 per share which beat the analyst consensus estimate of $0.31 by 6.45 percent. This is a 17.86 percent increase over earnings of $0.28 per share from the same period last year. The company reported quarterly sales of $1.32 billion which beat the analyst consensus estimate of $1.04 billion by 26.83 percent. This is a 5.59 percent increase over sales of $1.25 billion the same period last year.