State of North Carolina

04/17/2026 | Press release | Distributed by Public on 04/17/2026 08:26

NCDHHS Shares Prevention Guidance as Legionnaires’ Disease Risk Increases

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Friday, April 17, 2026

NCDHHS Shares Prevention Guidance as Legionnaires' Disease Risk Increases El NCDHHS comparte una guía de prevención a medida que aumenta el riesgo de enfermedad del legionario - Versión en español abajo

PRESS RELEASE - The North Carolina Department of Health and Human Services is raising awareness of Legionnaires' disease as cases have increased statewide and globally in recent years. North Carolina reported 310 cases in 2025 compared to 201 cases in 2024.
RALEIGH
Apr 17, 2026

The North Carolina Department of Health and Human Services is raising awareness of Legionnaires' disease as cases have increased statewide and globally in recent years. North Carolina reported 310 cases in 2025 compared to 201 cases in 2024.

Legionnaires' disease is a serious type of pneumonia caused by a bacteria called Legionella. These bacteria often live in wet environments like natural bodies of water, moist soil and man-made water systems such as hot tubs, decorative fountains, cooling towers, hot water tanks and misting devices that have been poorly maintained.

People get Legionnaires' disease by inhaling mist or vapor contaminated with Legionella, not through person-to-person contact. Most healthy people exposed to Legionella do not get sick, but those at higher risk of illness include:

  • People age 50 and older
  • People who are current or former smokers
  • People with certain health conditions or issues such as chronic lung disease, kidney failure, and diabetes
  • People with compromised immune systems

The primary way to prevent Legionnaires' disease is to control the growth and spread of Legionella in home water systems and in facilities with shared water systems. Steps you can take for prevention in your home include:

  • Flush faucets or showerheads if they have not been used for three or more days, or if the home water system was turned off for plumbing work.
  • Ensure proper maintenance and disinfection of hot tubs and follow manufacturer guidance.
  • Use water following the manufacturer's recommendations for in-home medical equipment such as humidifiers and CPAP or BIPAP machines. Clean the equipment parts and accessories regularly.
  • Follow the manufacturer's instructions for cleaning and replacing all water filters, including point-of-use filters (tap or refrigerator water/ice maker).
  • Drain garden hoses to avoid stagnant water. People at particularly high risk should talk to their doctor about if wearing a mask while doing gardening work would be beneficial.
  • Use proper windshield wiper fluid as Legionella can grow in the wiper fluid tank if tap water is added.

Additional steps can be taken in commercial buildings or health care facilities, especially those with cooling towers. While no single measure can ensure Legionella control, following prevention measures can help protect the health of employees and guests by prioritizing water safety:

  • Be aware of any unoccupied floors or rooms. Low occupancy decreases water flow, which can decrease disinfectant levels and hot water temperatures. See CDC's Legionella control considerations for hotel owners and managers website.
  • Ensure the building's water has enough disinfectant and that water is stored at an appropriate temperature. See CDC's Legionella control monitoring building water website.
    • Store cold water at temperatures under 77 degrees Fahrenheit.
    • Store hot water at temperatures over 140 degrees Fahrenheit.
  • Provide proper maintenance to any hot tubs on site. Legionella can spread in hot tubs due to constant warm water temperatures and aerosolization from water jets.
  • Provide proper maintenance of any decorative fountains or misters.
  • Cooling tower operators should be aware that Legionella can grow in both open- and closed-circuit cooling tower systems, especially after being idle during colder months. Understanding cooling tower design components are critical for Legionella control:
    • Cooling towers should be at least 25 feet from buildings.
    • Disinfectant use in cooling towers should be automated.
    • A cooling tower's piping system should be designed to avoid stagnation.
    • Operate cooling water towers at the lowest water temperature possible, ideally below 77 degrees Fahrenheit.
    • More information on controlling Legionella growth in cooling towers can be found on CDC's controlling Legionella in cooling towers website.

For more information, visit the NCDHHS Legionellosis webpage or reach out to your local health department.

El Departamento de Salud y Servicios Humanos de Carolina del Norte está creando conciencia sobre la enfermedad del legionario, ya que los casos han aumentado en todo el estado y en todo el mundo en los últimos años. Carolina del Norte reportó 310 casos en 2025 en comparación con 201 casos en 2024.

La enfermedad del legionario es un tipo grave de neumonía causada por una bacteria llamada legionela. Estas bacterias a menudo viven en ambientes húmedos como cuerpos de agua naturales, suelos húmedos y sistemas de agua artificiales como jacuzzis, fuentes decorativas, torres de enfriamiento, tanques de agua caliente y dispositivos de nebulización que han recibido un mantenimiento deficiente.

Las personas contraen la enfermedad del legionario por inhalación de niebla o vapor contaminado con legionela, no por contacto de persona a persona. La mayoría de las personas sanas expuestas a legionela no se enferman, pero aquellas con mayor riesgo de enfermedad incluyen:

  • Personas mayores de 65 años
  • Personas que son fumadores actuales o anteriores
  • Personas con ciertas afecciones o problemas de salud, como enfermedad pulmonar crónica, insuficiencia renal y diabetes
  • Personas con sistemas inmunitarios comprometidos

La principal forma de prevenir la enfermedad del legionario es controlar el crecimiento y la propagación de legionela en los sistemas de agua domésticos y en las instalaciones con sistemas de agua compartidos. Los pasos que puede seguir para la prevención en su hogar incluyen:

  • Enjuague los grifos o cabezales de ducha si no se han utilizado durante tres o más días, o si el sistema de agua del hogar se apagó para trabajos de plomería.
  • Garantice el mantenimiento y la desinfección adecuados de las tinas de hidromasaje y siga las instrucciones del fabricante.
  • Use agua siguiendo las recomendaciones del fabricante para equipos médicos en el hogar, como humidificadores y máquinas CPAP o BIPAP. Limpie las piezas y accesorios del equipo con regularidad.
  • Siga las instrucciones del fabricante para limpiar y reemplazar todos los filtros de agua, incluidos los filtros de punto de uso (agua del grifo o del refrigerador o de la máquina de hielo).
  • Drene las mangueras de jardín para evitar el agua estancada. Las personas con un riesgo particularmente alto deben hablar con su médico sobre si usar una mascarilla mientras realizan trabajos de jardinería sería beneficioso.
  • Use el líquido limpiador de parabrisas adecuado ya que legionela puede crecer en el tanque de líquido limpiador si se agrega agua del grifo.

Se pueden tomar medidas adicionales en edificios comerciales o instalaciones de atención médica, especialmente aquellas con torres de enfriamiento. Si bien no hay una sola medida que pueda garantizar el control de legionela, seguir las medidas de prevención puede ayudar a proteger la salud de los empleados y huéspedes al priorizar la seguridad del agua:

Para obtener más información, visite la página web de legionelosis del Departamento de Salud y Servicios Humanos de Carolina del Norte (NCDHHS, por sus siglas en inglés) o póngase en contacto con su departamento de salud local.

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State of North Carolina published this content on April 17, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on April 17, 2026 at 14:26 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]