How can Legionella bacteria be controlled in building water systems?
The most important way to prevent legionellosis is to maintain cooling towers and plumbing systems to limit the growth and spread of Legionella bacteria. Visual inspection and periodic maintenance of building water systems is highly recommended. Some best management practices for building water systems include: • Maintain cold water below 68°F and heating hot water between 122°F and 140°F. Take care to maintain hot water faucet temperatures at no more than 120°F to prevent scalding. • Drain, clean and disinfect hot water storage tanks and cooling towers at least once per year. • Maintain a daily operation and maintenance manual that includes written details about repair, alteration, operating time, monitoring and inspection and the use of anti-corrosives, biocides and disinfectants. • Document all operations and maintenance activities in a log book. • Treat circulating water systems to control microorganisms, scale, and corrosion. Contact equipment manufacturer for information about bi
