The 1996 Safe Drinking Water Act (SDWA) amendments mandated an agenda for the implementation of new programs and issuance of new drinking water regulations. This article discusses how public participation is an essential component in the development and implementation of the SDWA and of the partnership ethic embodied within. Topics discussed are: the sometimes misleading concept of public participation; the flexibility federal agencies have in meeting with the public and discussing elements of an anticipated regulation; how the issuance of a proposed rule in the Federal Register initiates the formal public comment period; and, how public involvement becomes limited after rule proposal. Includes 14 references, figure.