Hillsborough, Fla. – Due to the COVID-19 pandemic, many buildings and other properties have been unoccupied for an extended period. When water is stagnant for an extended time, there can be a build-up of hazardous metals and bacteria such as Legionella, which can cause a serious threat to drinking water. Legionella can grow and multiply, and transmit through aerosolized water droplets.

The water droplets can be transmitted through showerheads, hot tubs, sink faucets, centralized air-cooling systems, and large plumbing systems. Legionella can cause serious diseases and endanger the health of the community, especially vulnerable populations.

Here are some tips to prevent Legionella from developing:

• Develop a comprehensive water management program (WMP) for your water system and all devices that use water.
• Ensure your water heater is properly maintained and the temperature is correctly set.
• Flush your water system.
• Clean all decorative water features, such as fountains.
• Ensure hot tubs/spas are safe for use.
• Ensure cooling towers are clean and well-maintained.
• Ensure safety equipment including fire sprinkler systems, eye wash stations, and safety showers are clean and well-maintained.
• Maintain your water system.

The Centers for Disease Control and Prevention has Guidance for Reopening Buildings After Prolonged Shutdown or Reduced Operation.

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