Ground level ozone concentrations can be determined by source and sink mechanisms, which primarily rely on meteorological conditions (Pudasainee et al., 2006). Diem (2000) reported that the transition from the relatively dry atmosphere during the arid pre-summer months of May and June to the relatively moist atmosphere during the monsoon months of July and August appeared to explain the changes in ozone concentration. Lam et al. (2001) demonstrated that the fall maximum surface ozone was caused by weak, slowly moving high-pressure systems that created favorable photochemical production conditions and transported aged air masses with high levels of ozone and its precursors (nitrogen oxide and Volatile organic compounds).