Requirement to Reduce Legionella Risk in Healthcare Facility Water Systems to Prevent Cases and Outbreaks of Legionnaires’
***Revised 07.06.2018 to Clarify Expectations for Providers, Accrediting Organizations, and Surveyors***
***Revised 06.09.2017 to Clarify Provider Types Affected***
• Legionella Infections: The bacterium Legionella can cause a serious type of pneumonia called LD in persons at risk. Those
at risk include persons who are at least 50 years old, smokers, or those with underlying medical conditions such as chronic
lung disease or immunosuppression. Outbreaks have been linked to poorly maintained water systems in buildings with large or
complex water systems including hospitals and long-term care facilities. Transmission can occur via aerosols from devices
such as showerheads, cooling towers, hot tubs, and decorative fountains.
• Facility Requirements to Prevent Legionella Infections: Facilities must develop and adhere to policies and procedures that
inhibit microbial growth in building water systems that reduce the risk of growth and spread of legionella and other opportunistic
pathogens in water.