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. The purpose of this study is to bring together the resources to create a comprehensive, interactive online training focused on preventative 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 to maximize user engagement. Providing in-depth training on prevention of Legionella in complex water systems will help to decrease the number of infections throughout the United States.