Technical Abstract: Water quality models address nonpoint source pollution from agricultural land at a range of scales and complexities and involve a variety of input parameters. It is often difficult for conservationists and stakeholders to understand and reconcile water quality results from different models. However, models are generally the most feasible means of evaluating and informing farm-, landscape-, and watershed-level management decisions. Fact sheet and comparison slides are provided for a watershed-level model (Soil and Water Assessment Tool, SWAT) and farm-scale model (Integrated Farm Systems Model, IFSM) as part of a modeling and decision support tool forum. This information is intended to help persons working with the results of these models to better understand their spatial and temporal scales, complexity, and limitations.