CMS in US issues directive on Legionella-prevention


The directive encourages Medicare-certified healthcare facilities to use ASHRAE Standard 188 which establishes Legionellosis risk management requirements for building water systems

To reduce cases of Legionnaires’ disease in healthcare facilities, the Centers for Medicare & Medicaid Services (CMS) has announced that Medicare-certified healthcare facilities must develop and maintain water management policies and procedures to reduce the risk of growth and spread of Legionella and other opportunistic pathogens in building water systems. The directive has an immediate effective date.

Legionnaires’ disease is a type of pneumonia, caused by Legionella bacteria that live in water.

The announcement was made in a recent memorandum to State Survey Agency Directors and includes hospitals, critical access hospitals and long-term care facilities.

Most notably, CMS called for the utilisation and compliance of ASHRAE Standard 188: Legionellosis: Risk Management for Building Water Systems, which was developed to assist designers and building operators in developing a water management plan that includes practices specific to the systems that exist in a particular building, campus or health care facility.

The timing of CMS’ decision is significant as the CDC released a report last month stating more than 76% of Legionnaires’ disease cases acquired from Legionella exposure in healthcare facilities can be particularly harsh, including possible fatal risks to patients.

“Incorporating good design, operations and maintenance procedures that prevent the growth and spread of Legionella is vitally important in all buildings, especially health care facilities. These are regarded as the best methods for preventing this potentially fatal disease,” says Michael Patton, member of ASHRAE Committee SSPC 188.

“ASHRAE has been at the forefront of establishing best practices through ASHRAE Standard 188. We are pleased that CMS is taking a strong stance on this issue.”

The CMS memo calls on State Survey Agency Directors to conduct a facility risk assessment, implement a water management program that considers ASHRAE Standard 188 and the toolkit developed by the CDC entitled, “Developing a Water Management Program to Reduce Legionella Growth and Spread in Buildings: A Practical Guide to Implementing Industry Standards.”

The directive also requires facilities to specify testing protocols.

The CDC toolkit – initially released in 2016 and updated in June 2017 – is based upon ASHRAE Standard 188 and provides a checklist to help building owners and managers identify if a water management program is needed, examples to help identify where Legionella could grow and spread in a building and ways to reduce risk of contamination.

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“With the release of both the CDC report and CMS memo, it is clear ASHRAE Standard 188 is the best resource available to help health care facilities implement an effective water management program to Legionella infections,” says Patton.