How is air quality changing in rapidly growing arid cities? This comprehensive field study examines atmospheric ozone pollutants in Jiddah, Saudi Arabia, over a four-year period, providing insights into air pollution trends in arid regions. The research developed ozone trends for five stations in Jiddah, reporting daily, monthly, and annual ozone means and maximums. Average ozone concentrations were analyzed, revealing a slight decrease from 1984 to 1987. This research offers a detailed analysis of air quality patterns in Jiddah. The observed reduction in pollutant concentration was attributed to the implementation of motor vehicle periodical inspections. The findings demonstrate the effectiveness of air quality control measures. Analysis of the data shows a lower mean than any international air quality standard, making it particularly valuable for urban planning and environmental management efforts.