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U.S. Legionnaires’ Disease Outbreak Tracker
A searchable map and database of Legionnaires’ disease outbreaks across the United States — aggregated from CDC surveillance, state and local health departments, and news reports, and monitored continuously by the national food- and waterborne-illness attorneys at Pritzker Hageman.
About this tracker
This tool maps and catalogs Legionnaires’ disease outbreaks reported across the United States so patients, families, journalists, and public-health researchers can see where clusters are occurring and how large they are.
It aggregates official surveillance data and credible reporting, cites a source for every entry, and clearly marks figures as provisional. It is published as a public service by Pritzker Hageman, P.A., and is for information only — it is not medical or legal advice.
Browse all outbreaks by stateFrequently asked questions
- What is Legionnaires' disease?
- Legionnaires' disease is a serious, sometimes fatal form of pneumonia caused by Legionella bacteria. People can develop it after breathing in small droplets of water that contain the bacteria. A milder illness caused by the same bacteria is called Pontiac fever.
- How do people get Legionnaires' disease?
- Legionella grows in building water systems — cooling towers, hot tubs, decorative fountains, large or complex plumbing systems, and hot-water tanks. Outbreaks are frequently linked to hotels, hospitals, long-term-care and senior-living facilities, and other large buildings. It is not usually spread from person to person.
- What are the symptoms, and when do they appear?
- Symptoms can include cough, shortness of breath, fever, muscle aches, and headaches, and generally begin 2 to 14 days after exposure. Anyone with these symptoms — especially after staying somewhere named in an outbreak — should contact a healthcare provider promptly.
- Where does the data in this tracker come from?
- Entries are aggregated from CDC National Notifiable Diseases Surveillance System (NNDSS) data, HealthMap, HC Info, and news reports — including state and local health-department releases cited in those reports. Every entry links to its source. Counts are provisional and can change as investigations proceed.
- How current is the tracker?
- The tracker updates automatically on a recurring schedule and reflects the most recent successful data collection. Because outbreak investigations evolve, figures shown here are provisional and may be revised or withdrawn by the reporting authority.
- I think I was exposed — can Pritzker Hageman help?
- Yes. Pritzker Hageman is a national law firm that represents people harmed in Legionnaires' disease and other outbreaks. If you were diagnosed after staying at a hotel, receiving care, or visiting a facility named in an outbreak, you can request a free, confidential case review. You pay nothing unless the firm wins your case.