The first awareness of the risks of legionella bacteria in cooling water was the outbreak of Legionellosis at the hotel hosting the Legionnaires’ Convention in Philadelphia, Pennsylvania, in 1976..
The first awareness of the risks of legionella bacteria in cooling water was the outbreak of Legionellosis at the hotel hosting the Legionnaires’ Convention in Philadelphia, Pennsylvania, in 1976. For the last 38 years, the US Center for Disease Control (CDC) tabulated an increasing number of cases of legionellosis as physicians and hospitals began to improve their diagnostic capability.
The CDC recognized that a key factor in preventing Legionellosis requires “control of the hazard”—the hazard being the point source of aerosols contaminated with legionella bacteria. Cooling tower drift can be a point source of legionella-contaminated aerosols.
Action plan
In 2007, the
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