The University of Houston has launched a program to build a research information infrastructure that includes air quality measurement data and large-scale modeling tools. The system integrates a set of meteorological models, emissions processing systems, air quality models, a trajectory analysis tool, a GIS-based data analysis/visualization system, and a collection of observational data sets for the Houston-Galveston area housed in a network of computer systems. These tools fit together to create the products that allow us to effectively model air quality.