The purpose of the Workshop was (1) to consider the possibilities for collaboration among federal and state organizations that either build, or sponsor the building of, data resources in the areas of toxicology and the environment; and (2) to facilitate the use of existing data resources in these subject areas by state organizations. Many states, far from having the luxury of building data resources, face grave difficulties in gaining access to the toxicology information that is already available. If building a cooperative database is the long-term goal of the community, then solving the 'access problem' is an immediate goal. Three categories of state needs for information and data resources were identified: (1) improved methods for rapid, informal inter-state and state-federal communications; (2) improved access to existing databases; (3) coordination/collaboration in database building. The Steering Committee made several recommendations related to establishing a 'Coordinating Council for Toxicological and Environmental Data Resources' and for necessary financial and personnel resources. In addition to the summary, papers and reports, the appendices include the workshop agenda and attendees, a questionnaire for the California HESIS survey, chemicals ranked by number of responses in the HESIS survey, and a description of the GTE/Medical Information Network (MINET).