The Alliance to Prevent Legionnaires' Disease

The Alliance to Prevent Legionnaires’ Disease (APLD) is a non-profit coalition of health advocates, health providers, building engineers, scientists, water treatment experts and manufacturers. We are actively working to educate residents, building owners, policy makers, media representatives, water system managers and professionals, and government officials about the facts surrounding water quality, effective strategies for addressing the root causes of Legionnaires’, and better protecting public health.

The Signs and Symptoms

Legionnaires’ Disease Facts

Legionnaires’ disease is caused by the waterborne legionella bacteria, named after the 1976 outbreak involving a Philadelphia convention of the American Legion. During the event, many veterans and some attendees developed a severe, previously unrecognized form of pneumonia that became known as Legionnaires’ disease. The Centers for Disease Control and Prevention estimates approximately 8,000 cases of Legionnaires’ disease annually. Peer-reviewed literature suggests that building drinking water systems are the primary pathways for exposure to Legionella bacteria which originates in fresh and municipal water systems.