What are the documentation requirements for Legionella risk in ASHRAE Standard 62.1-2022?

• A. Documentation must comply with ASHRAE Standard 188.
• B. Documentation is optional.
• C. Only requires annual testing but no standard.
• D. Requires ISO 9001.

Answer: (A)

Documentation of Legionella risk under ASHRAE 62.1-2022 must comply with ASHRAE Standard 188. This standard provides the specific program approach for managing Legionella in building water systems, including risk assessment, control measures, maintenance, verification, and recordkeeping. 62.1-2022 uses 188 to define the required documentation framework, ensuring consistent implementation across projects. It isn’t optional, it isn’t limited to just annual testing, and it isn’t governed by ISO 9001. ISO 9001 is a broad quality-management standard and does not address Legionella risk management in depth. So the correct concept is that the documentation requirements are tied to and must follow ASHRAE 188.