ASHRAE Legionella standard

Updated ASHRAE Legionella standard released

Tuesday, August 14, 2018

A newly updated version of the ASHRAE Legionella standard recognizes new developments in risk management for building water systems since the inaugural edition was published two years ago. Like its predecessor, ANSI/ASHRAE 188-2018 outlines best practices for preventing growth and spread of the micro-organism both generally and in specific types of facilities, like health care.

“Since this standard centres on the development and implementation of good design, operations and maintenance procedures, it is important to make updates on a regular basis,” explains Paul Lindahl, chair of ASHRAE’s Standard 188 committee. “The 2018 edition of the standard focuses on improved usability, offering better guidance to minimize the risk of this potentially fatal disease and save lives.”

The 2018 edition of Standard 188 provides:

  • A description of environmental conditions that promote the growth of Legionella.
  • Informative annexes and bibliography with suggestions, recommendations, and references to additional guidance.
  • Minimum Legionellosis risk management requirements for buildings and associated potable and non-potable water systems.
  • Requirements for Legionellosis control strategies and documentation.

The U.S. Center for Disease Control estimates there are 8,000 to 18,000 cases of Legionnaires’ disease in that country every year, resulting in 800 to 1,800 deaths. Most cases of Legionnaires’ and a milder form of the illness, known as Pontiac Fever, are attributed to contamination in building water systems.

1 thought on “Updated ASHRAE Legionella standard released

  1. Glad to see new regulations on Legionella. There have been quite a few articles recently on chemical treatment for Legionella but rarely do you see preventative solutions like integrating UV disinfection. UV has been used to disinfect water, surfaces, and air but hasn’t made a big impact on the medical field as the lamps contain mercury. UV LEDs have become more available and solutions for Legionella through these LEDs has become possible. Read more here:

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