Infections with Legionella have been steadily increasing over the past decade. Current strategies regarding Legionella have been focused on response-based approaches rather than prevention-based. Currently there are multiple resources available through different platforms that highlight guidelines and standards for Legionella prevention and water system management. The purpose of this study is to bring together the resources to create an interactive online training focused on preventative environmental health interventions. The training will include multiple modules aimed towards creating an understanding of Legionella, how it survives, thrives and moves throughout complex water systems, identifying critical control points and a variety of interventions. The content for the training will be delivered in multiple formats including videos, interactive graphics, and decision tree activities to maximize user engagement. This training will be pilot tested with professionals in the field a total of 2 separate times. Following pilot testing continuing education credits will be obtained for the training through multiple national organizations, including the Association for Professionals in Infection Control and the Association for the Healthcare Environment. The final training will be made readily available to all professionals in the field. Providing in-depth training on prevention of Legionella in complex water systems will help to decrease the number of infections throughout the United States.