• What is Legionella?
• Exposure and Transmission
• Disease Symptoms
• Incidence and Risk Factors
• Diagnosis and Treatment

• Cooling Towers, Evaporative Condensers, and Fluid Coolers
• Humidifiers and Misters
• Domestic Water Systems
  • Domestic Hot-Water Systems
  • Domestic Cold-Water Systems
• HVAC Systems
• Water Sampling Guidelines

• Level One Investigation
• Level Two Investigation

• Evacuation and Isolation
• Investigation
• Collect Water Samples
• Control Actions

THANKS TO OUR CONTRIBUTORS

Technical Editorial Board

Editor:

• OSHA Directorate of Technical Support and Emergency Management; Washington, DC

Other Members:

• Surender Ahir, Toxicologist, OSHA Directorate of Standards and Guidance; Washington, DC
• Richard E. Danielson, PhD, Laboratory Director, BioVir Laboratories; Benicia, CA
• Lee Hathon, Mechanical Engineer, OSHA Directorate of Technical Support and Emergency Management, Salt Lake Technical Center (SLTC); Salt Lake City, UT
• Janet Macher, ScD, MPH, Environmental Health Laboratory Branch, California Department of Health Services; Berkeley, CA

Special thanks to the following for providing materials including text and/or images used in this eTool:

• Getty Images
• Microsoft Clip Art Gallery

Past Contributors:

• Bob Curtis, OSHA