In current pilot studies, filter runs are conducted with the objective of maximizing unit filter run volume while providing the desired level of removal of influent material, as measured by turbidity, particles, cysts and microbiological parameters. These constraints require treatment optimization within the requirements of the Surface Water Treatment Rule (SWTR). However, a process which is optimized with respect to the SWTR may not be acceptable with respect to disinfection byproduct formation. In some cases, it can be demonstrated that clear tradeoffs exist between processes which are optimized based on the requirements of the SWTR and those which minimize the formation of disinfection byproducts. It is no longer sufficient to consider filtration efficiency with a single goal of producing a non-turbid filter effluent- other constraints must be acknowledged. The most important of these new constraints are the additional requirements of the SWTR and the DBP Rule. This paper presents some examples of specific treatment tradeoffs which have been found to exist between the competing goals of the SWTR and DBP Rule. Examples are presented from a filtration treatment pilot study conducted for the City of Portland, Oregon, Bureau of Water Works.