When it comes to cooling towers, safety is paramount, especially concerning Legionella bacteria. Here's what you need to know: 
Open- vs. Closed-Circuit Cooling Towers: All cooling towers, whether open- or closed-circuit, use water evaporation to remove heat. Both types require similar operation and maintenance protocols. However, closed-circuit towers have an additional closed loop that minimises exposure to the atmosphere, reducing the risk of Legionella spread. 
Design Recommendations: To control Legionella, certain design components are crucial. This includes using high-efficiency drift eliminators, locating towers away from building air intakes, and ensuring proper system piping to avoid stagnation. 
Operation, Maintenance, and Control Limits: Safe operation and regular maintenance are key to protecting against Legionella exposure. Guidelines include following manufacturer recommendations for cleaning and disinfection, monitoring water parameters, and implementing automated water treatment systems. 
Remediation: If Legionella is suspected, remediation protocols should be followed, including online and offline cleaning and disinfection procedures. These steps may require consultation with public health authorities and water treatment professionals. 
Legionella Sampling: Regular testing of cooling towers is essential to ensure water safety. Quarterly sampling is recommended, with more frequent testing advised if raised bacteria levels are detected or during initial tower installation. 
Legionella Risk Assessment: Conducting a legionella risk assessment is essential. It helps identify potential hazards and ensures proper maintenance and treatment of cooling towers. 
Testing Procedures: Water samples should be taken from the same point in the tower basin on each occasion, away from the make-up water source. Samples should be tested in a UKAS accredited laboratory, with results informing future testing frequency and measures to reduce legionella levels if necessary. 
Regulatory Guidance: The Health and Safety Executive provides detailed guidance on Legionnaires' disease control in evaporative cooling systems. Following these guidelines ensures compliance and effective management of cooling tower systems. 
Qualified Testing: It's crucial to have properly trained and experienced individuals conduct water testing for legionella and other waterborne bacteria. Hiring qualified experts ensures accurate testing and risk assessments. 
Mitigating Risks: Cooling towers pose significant Legionnaires' risks if not properly maintained. By sourcing expert help and following regulatory guidelines, you can mitigate these risks and keep your employees and others safe from harm. 
💼💧 Choose GES Water for Legionella Testing: Partnering with GES Water ensures reliable and comprehensive legionella testing services. Our expertise in water treatment solutions and commitment to safety makes us the best option for your business. 
Call us now on 0800 121 8808 or email us here [email protected] 
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