Cases of Legionnaires’ disease in the United States grew by nearly four times from 2000 through 2014. CDC investigations show that outbreaks of this disease are due to common problems with water system maintenance and come from a number of sources such as potable water, hot tubs and cooling towers. It is therefore essential to closely monitor and quickly respond to changes in building or facility water that may increase the risk of Legionella growth and spread.

In response to Legionella outbreaks, the CDC has developed a resource toolkit, “Developing a Water Management Program to Reduce Legionella Growth & Spread in Buildings: A Practical Guide to Implementing Industry Standards.” This toolkit gives guidance to building owners and managers about:

  • Which buildings and devices need a Legionella water management program
  • Elements of a good water management program and direction for developing one
  • The part(s) of a building that are at increased risk for growing and spreading Legionella
  • Scenarios they might encounter with water quality problems and how to respond to them to help reduce the risk of Legionella

View the CDC Legionella toolkit

More information about Legionella is available on the CDC website