U.S. Centers for Disease Control recently distributed a new guide, Developing a Water Management Program to Reduce Legionella Growth & Spread in Buildings. This guide features a checklist to help building owners and managers identify where Legionella could grow and spread in a building and ways to reduce the risk of contamination. Information on how events outside of buildings can lead to Legionella growth, such as construction, water main breaks and changes to municipal water quality is also included.
AWWA recommends that utilities familiarize themselves with the guide and share it with relevant customers.
The American Society of Heating, Refrigerating and Air-Conditioning Engineers
• Standard 188-2015 - Legionellosis: Risk Management for Building Water Systems (ANSI Approved)
• Technologies for Legionella Control in Premise Plumbing Systems: Scientific Literature Review
• Guidance on treatment options for Legionella
NSF International Center of Excellence for Building Water Health: Standards in Development
• NSF/ANSI 444: Prevention of Disease and Injury Associated with Building Water Systems (in development)
• NSF 459: Products intended to reduce or mitigate biofilm (in development)
• Independent auditing for building water systems
Public Works and Government Services Canada
• Mechanical design 15161—2013 control of Legionella in mechanical systems