Here are good links about flushing water from buildings that have been empty for some time to reduce the risk of Legionella issues as people start to return to work.

• BOMA – Building Owners and Managers Association
• AWWA – American Water Works Association
• IDEA – International District Energy Association
• AGA – American Gas Association
• GIPHCC – Greater Indianapolis Plumbing – Heating – Cooling Contractors
• HVACINDIANA – Indiana HVAC Association
• ASHRAE – American Society of Heating, Refrigerating and Air-Conditioning Engineers
• Purdue University – Center for Plumbing Safety COVID-19 Response
• Guidance for Flushing Public Water Systems
• Return to Service Guidance (AWWA)
• Water Quality in Low Occupancy and Shutdown Buildings (Purdue University)
• Guidance for Building Water Systems (CDC)
• Coronavirus Shutoffs and Return to Service Guidance
• Building Water Safety Study
• Building Water System