Distribution of Ozone in the Jiddah Atmosphere

The study of air pollution in Saudi Arabia is not only very important at local level; it may also provide an improved understanding of air pollution problems in other arid regions throughout the world. A comprehensive field study of atmospheric ozone pollutants was conducted in Jiddah, Saudi Arabia (one of the fastest growing cities in the world)for the period 1984 to 1987. Ozone trends have been developed for five stations in Jiddah. Daily, monthly and annual means, maximum and mean maximum are reported. Average ozone concentration for these four years is given. A slight decrease in ozone concentration from 1984 to 1987 was observed. The observed reduction in the pollutant′s concentration during 1985‐87 was attributed to the implementation of motor vehicle periodical inspection (MVPI). Background information for air quality standards and the statistical significance of data are discussed. Analysis of data shows a lower mean than any international air quality standard.