Scientifically derived environmental indicators are central to environmental decision analysis. This article examines the interface between science (environmental indicators) and policy, and the dilemma of their integration. In the past, science has been shown to dominate many policy debates, usually with unfavorable results. The issue, therefore, is not whether science can determine policy but how science can be part of a more holistic analysis that incorporates other critical perspectives. This article discusses the importance of considering alternative views (as represented by different scientific indicators) within the policy debate. Six example ozone indicators, constructed from the same raw data, are used to illustrate this point. Two represent newly developed indicators that respond to present-day policy questions at the U.S. Environmental Protection Agency. The article concludes with a brief discussion of how such indicators can be used to better define a policy question, inform the policy debate, and evaluate policy alternatives.