This draft document is a compilation of publicly available, peer-reviewed, technical literature that evaluates the effectiveness of technologies to control for Legionella. The United States Environmental Protection Agency (EPA) developed this document because the agency recognizes that Legionella is a public health threat. EPA also recognizes that many facility managers are choosing to install treatment systems to prevent or mitigate Legionella in their building’s plumbing systems. The agency expects this document will help to further improve public health by helping the targeted audience make science-based, risk management decisions regarding treatment and control of Legionella in buildings.

The EPA is not promoting or endorsing treatment technologies as a preferred means of Legionella control. Rather the agency seeks to provide decision makers with scientific information on the effectiveness of these technologies and the operational requirements. The target audience for this document includes, but is not limited to, primacy agencies, building water system operators, building owners and technology developers and vendors.”

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