Tetra Tech (NASDAQ:TTEK) reported quarterly earnings of $0.44 per share which beat the analyst consensus estimate of $0.40 by 8.91 percent. This is a 15.79 percent increase over earnings of $0.38 per share from the same period last year. The company reported quarterly sales of $1.330 billion which beat the analyst consensus estimate of $1.064 billion by 25.00 percent. This is a 16.26 percent increase over sales of $1.144 billion the same period last year.