While Legionnaires’ disease has been identified since 1976, it’s only come to the forefront for many facilities nationwide over the last couple of years. The increased attention began in earnest after the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) came out with Standard 188. Following up on that, the Centers for Medicare & Medicaid Services (CMS) came out with their edict that facilities currently receiving Medicare aid or payments needed to develop a water management program in order to keep receiving funds. This mandatory guidance was a governmental response to the lack of widespread adoption of water management plans.
The data in the Figure 1 graph was compiled by government agencies that track disease trends. Over the past 15 years, the incidence of Legionnaires’ disease has risen substantially. A variety of factors come into play as to why this may be so. The population is aging, which means there are more at-risk individuals. Additionally, building infrastructures are also aging – specifically in this case, plumbing infrastructures – and are not always maintained as they should be. Another often overlooked but likely culprit is water flow reduction measures, such as low-flow or no-flow water systems.