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Ensure that cooling towers are maintained (including start-up and shut-down procedures) per manufacturer’s guidelines and industry best practices.

Ensure cooling towers are clean and well-maintained.

All Legionella testing decisions should be made in consultation with facility water management program staff along with relevant public health authorities.

Facilities may decide to test the hot tub/spa for Legionella before returning to service if previous device maintenance logs, bacterial testing results, or associated cases of Legionnaires’ disease indicate an elevated level of risk to occupants.

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CDC Hot Tub Disinfection Guidance pdf icon (follow Steps 4–9 and 12–13).

Perform a hot tub/spa disinfection procedure before use.

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Ensure that hot tubs/spas are free of visible slime or biofilm before filling with water.Check for existing guidelines from your local or state regulatory agency before use.After the water feature has been re-filled, measure disinfectant levels to ensure that the water is safe for use.Ensure that decorative water features are free of visible slime or biofilm.Be sure to follow any recommended manufacturer guidelines for cleaning.Clean all decorative water features, such as fountains.Follow water-using device manufacturers’ instructions. Other water-using devices, such as ice machines, may require additional cleaning steps in addition to flushing, such as discarding old ice.Care should be taken to minimize splashing and aerosol generation during flushing.Anti-scalding controls and devices may limit the maximum temperature at the point of use. Where possible, hot water at the tap should reach at or above 120☏. Flush until the hot water reaches its maximum temperature.The purpose of building flushing is to replace all water inside building piping with fresh water. Flushing may need to occur in segments (e.g., floors, individual rooms) due to facility size and water pressure.

Flush hot and cold water through all points of use (e.g., showers, sink faucets).

Higher temperatures can further reduce the risk of Legionella growth, but ensure that you take measures to prevent scalding.

Make sure that your water heater is set to at least 140☏.

Ensure that all maintenance activities are carried out according to the manufacturer’s instructions or by professionals.

Determine if your manufacturer recommends draining the water heater after a prolonged period of disuse.

Ensure your water heater is properly maintained and the temperature is correctly set.

Preventing Occupational Exposure to Legionella.

Water management programs in healthcare facilities are an important way to help protect vulnerable patient populations as well as staff and visitors.

Reduce Risk from Water: Plumbing to Patients:.

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PreventLD Training aligns with industry standards on managing risk of Legionella bacteria.Ĭonsiderations for Hotel Owners and Managers: How to Prevent Legionnaires’ Disease Take this training from CDC and partners on creating a water management program to reduce risk of Legionnaires’ disease. Preventing Legionnaires’ Disease: A Training on Legionella Water Management Programs (PreventLD Training):.

This toolkit provides public health and building owners and operators with concise, actionable information on controlling Legionella in commonly implicated sources of Legionnaires’ disease outbreaks.

Toolkit for Controlling Legionella in Common Sources of Exposure:.

This toolkit is designed to help people understand which buildings and devices need a Legionella water management program to reduce the risk of Legionnaires’ disease, what makes a good program, and how to develop it. Guidance to help with these processes are the following:

Develop a comprehensive water management program (WMP) for your water system and all devices that use water.