POʻIPŪ, Kauaʻi — The Hawaiʻi Department of Health (DOH) is investigating two confirmed cases of Legionnaires’ disease involving visitors who stayed at Nihi Kai Villas, a condominium property on Kauaʻi’s South Shore.
According to a Nov. 4 announcement, water testing results received by DOH on Oct. 13 detected Legionella bacteria in the property’s water systems, raising concerns about potential ongoing exposure for guests and residents.
Health officials have not yet determined the exact source of exposure or the extent of potential spread. The department is working with property representatives to address the health risks while investigating possible cases dating back to January 2025.
Legionnaires’ disease is a potentially serious form of pneumonia caused by inhaling water droplets containing Legionellabacteria. The bacteria can grow in plumbing systems, showerheads, faucets and hot tubs.
Symptoms typically develop within two to 14 days of exposure and may include coughing, fever, shortness of breath, muscle aches and headaches. Adults 50 and older, smokers and individuals with weakened immune systems or chronic lung conditions face an increased risk.
DOH emphasizes that Legionnaires’ disease does not spread from person to person and that the risk to the general public remains low.
Anyone who stayed at Nihi Kai Villas within the past two weeks and develops symptoms is encouraged to seek medical attention and contact DOH at 808-586-4586.
The department is also asking anyone who developed pneumonia within two weeks of staying at the property since January 2025 to come forward.
Although the investigation centers on Poʻipū, the announcement serves as an islandwide reminder of the importance of maintaining safe water systems in residential and visitor accommodations.