Health Department Probes Legionnaires' Cases at Kauai Resort
Two nonresident visitors who stayed at Nihi Kai Villas on Kauai have confirmed Legionnaires' disease, and water testing found Legionella bacteria.
Updated on Nov. 5, 2026 in Hospitality
The Hawaii State Department of Health is investigating two confirmed Legionnaires' disease cases in nonresident visitors who stayed at Nihi Kai Villas, a multi-building condominium property on Kauai. Water testing results received October 13, 2026 indicated Legionella bacteria in the property's water systems.
Why it matters
The investigation covers possible cases dating back to January 2025, which could widen the number of people affected by exposure at the property. DOH has notified public health agencies nationwide and asked for reports of cases involving people who traveled to Hawaii.
Two confirmed Legionnaires' disease cases are linked to stays at Nihi Kai Villas, and the state is reviewing possible cases dating back to January 2025. Investigators have not yet determined how many additional people, if any, were exposed.
The players
Hawaii State Department of Health
The state agency responsible for public health in Hawaii, which oversees disease investigations and public health notifications across the islands.
Nihi Kai Villas
A multi-building condominium property on Kauai where the exposure occurred and which is now the focus of the state's water testing and disease investigation.
The details
Legionella bacteria can grow in human-made water systems such as showerheads, sink faucets, cooling towers, hot tubs, and large plumbing systems, and Legionnaires' disease is caused by exposure to the bacteria. People who stayed at the property and develop symptoms within two weeks of their stay are urged to seek medical attention, since symptoms typically appear two to 14 days after exposure and adults age 50 and older face higher risk.
Timeline
January 2025: Earliest possible case under review, dating to stays at the property from this period.
October 13, 2026: DOH received water testing results showing Legionella bacteria in the property's water systems.
Market Landscape
Legionella investigations in large buildings, such as the 2015 South Bronx outbreak tied to a cooling tower, have repeatedly shown how building water systems can expose visitors and residents over extended periods. For Hawaii's visitor economy, the Nihi Kai Villas case shows how a single property's water system can draw national public health attention to a destination.
Travelers who stayed at Nihi Kai Villas and develop fever, cough, or shortness of breath within two weeks should seek medical care and mention their recent Hawaii stay. Legionnaires' disease does not spread from person to person and is treatable with antibiotics, so prompt evaluation is the main step for anyone concerned.
The takeaway
Anyone who stayed at the property and has symptoms should contact a doctor promptly, since early antibiotic treatment is effective. The investigation's findings on how far back exposure occurred will shape who is advised to get checked.
Further reading
For related coverage of the visitor industry, see Hospitality in Hawaii business news.
