Cooling towers are a common source —22 percent — of building-associated Legionnaires’ disease outbreaks, notes a report from the Centers for Disease Control (CDC).

The toolkit — Developing a Water Management Program to Reduce Legionella Growth & Spread in Buildings: A Practical Guide to Implementing Industry Standards — gives a checklist to identify if a water management program is needed, examples to help identify where Legionella could spread and ways to reduce the risk of Legionella contamination.