Advancing Through Health Research

Efforts to prevent Legionnaires’ disease, a severe form of pneumonia caused by the Legionella bacteria, focus on comprehensive water management programs. These programs aim to control water quality in systems where the bacteria thrive, such as cooling towers, hot water tanks, and large plumbing systems in buildings. Research in this area 

explores optimizing disinfection techniques, improving water treatment protocols, and developing real-time monitoring systems to detect Legionella contamination. Advanced molecular techniques like PCR and metagenomics are also employed to better understand the pathogen’s ecology. Public health campaigns emphasize the importance of regular inspection, maintenance, and certification of water systems to mitigate the risks.

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Legionnaires' Disease cases in 2023

Number of Cases


Learn about Legionnaires’ Disease

Legionnaires Latest Research

Threats on Tap: Widespread Violation highlight need for investment in water infrastructure and Protections

The Safe Drinking Water Act (SDWA), one of our bedrock environmental laws, established the role of government in providing safe, clean drinking water.

Legionellosis on the rise: A scoping review of sporadic, community-acquired incidence in the United States

Legionnaires’ disease, a type of pneumonia that is often severe and has a 7–10% mortality rate, is the leading cause of drinking water disease outbreaks in the United States.

Occurrence of Legionella in UK household showers

Household water systems have been proposed as a source of sporadic, community-acquired Legionnaires’ disease.

Listen to Dr. Hung Cheung

Dr. Hung Cheung, Founder and President of Cogency and Board Member of APLD, discusses what Legionnaires’ Disease is and the difference between an outbreak and sporadic cases. Dr. Hung Cheung uses examples throughout the video to bring awareness to Legionnaires’ Disease.