The Hawai‘i Department of Health (DOH) is closely monitoring a positive wastewater sample for measles virus, which marks the first wastewater detection of the virus in the state. As of yesterday, no suspected measles cases have been reported. Testing for measles virus was added to surveillance in 2025, through WastewaterSCAN in May, NWSS-Verily in July, and Biobot Analytics in August. The presence of measles virus in wastewater does not confirm a clinical case or community spread. The two confirmed measles cases in Hawai‘i in April 2025 occurred before measles wastewater testing began and are not related to this current wastewater detection.