The research reported in this paper explicates environmental management practices more comprehensively than has been attempted previously. Environmental management practices are grouped into those that relate to operational, tactical and strategic levels of a firm. While these firms engage in many environmental practices to varying degrees, the results of this study suggest many firms are emphasizing a subset of practices at the operational and strategic levels. The conceptual framework and results of this study can be used to develop measurement scales to guide additional research in this area.