The purpose of this thesis is to understand the applications and limitations of the Climatological Dispersion Model (CDM), and to explain the role of dispersion modeling within the framework of urban and regional planning. In order to reach the first objective, a detailed study study of the mechanics of the CDM was conducted. Completion of this task provided the necessary foundation for a discussion of the assets and limitations of the model. Conclusions and recommendations are made concerning the utility of the CDM for an urban area.The second objective focuses on the practical applications of dispersion modeling and is divided into four areas; the role of dispersion modeling in air quality management, the practical applications of dispersion modeling from a community view, the incorporation of dispersion modeling into the planning process, and the effectiveness and future direction of dispersion modeling.