Manufacturing Facility Legionella Control

Legionella control is essential in manufacturing facilities because many of these environments have complex water systems and equipment that can support the growth and spread of Legionella bacteria—putting workers and visitors at risk for Legionnaires’ disease. Some common solutions for these complex water systems include secondary disinfection, Legionella testing, Legionella risk assessment, and Legionella water management plans.

Why Manufacturing Facilities Are at Risk

Factor Description
Industrial Water Systems Facilities often use cooling towers, water tanks, humidifiers, and process water systems—all of which can harbor and aerosolize Legionella.
Large Plumbing Networks Complex, sprawling water systems with dead legs or infrequently used piping increase the chance of water stagnation and bacterial growth.
Aerosol Generation Equipment like spray booths, cooling systems, air scrubbers, or even pressure washers can create aerosols that spread Legionella.
Outdoor-Indoor Spread Cooling towers, commonly used in industrial HVAC systems, can disperse contaminated mist over a wide area—sometimes even affecting neighboring buildings.

Health & Safety Risks

  • Legionnaires’ disease is a severe pneumonia caused by inhaling contaminated water droplets.
  • Workers with compromised immune systems, smokers, or those with chronic lung conditions are especially vulnerable.
  • Outbreaks can lead to illness, absenteeism, lawsuits, or shutdowns of operations.

Legal and Regulatory Requirements

  • OSHA and local health departments may investigate cases and cite employers under the General Duty Clause if Legionella is not adequately managed.
  • Some industries are required to have a Legionella risk assessment as part of their Health and Safety Management System.
  • Guidelines such as ASHRAE 188 and CDC Water Management Toolkits provide frameworks for compliance.

Legionella Control Measures in Manufacturing

  • Create and implement a Water Management Program.
  • Maintain cooling towers, ensuring proper cleaning, disinfection, and water treatment.
  • Monitor and maintain water temperatures to avoid ranges (20–50°C / 68–122°F) where Legionella thrives.
  • Flush rarely used water lines and eliminate stagnant zones.
  • Test water systems regularly, especially in high-risk areas.
  • Train maintenance teams to recognize risks and symptoms of Legionella.

Manufacturing environments have unique Legionella risks due to their water-intensive operations. Effective control is crucial to protect worker health, maintain regulatory compliance, and prevent costly disruptions or reputational damage from outbreaks. Legionella control isn’t just about safety—it’s also about responsible industrial risk management.  Contact us today to start protecting your facility.

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