Please view the article through the link below on “Guidance for Building Water Systems” during the COVID-19 Pandemic.

Stagnant, or standing water can cause conditions that increase the risk for growth and spread of Legionella and other biofilm-associated bacteria.  When water is stagnant, hot water temperatures can decrease to the Legionella growth range (77–108°F, 25–42°C).  Stagnant water can also lead to low or undetectable levels of disinfectant, such as chlorine.  Ensure that your water system is safe to use after a prolonged shutdown to minimize the risk of Legionnaires’ disease and other diseases associated with water.

“Guidance for Building Water Systems”