CORVALLIS, Ore. — The Benton County Health Department (BCHD) was recently notified that measles has been detected in wastewater sampling in an area that includes Corvallis and Lewisburg, Oregon.
This means that there is, or has recently been, at least one person infected with the measles virus within the Corvallis-Lewisburg area. To date, no confirmed measles cases have been reported in Benton County.
In October 2025, the Oregon Health Authority (OHA) partnered with Oregon State University (OSU) to begin measles testing in wastewater across Oregon. A sample collected in Benton County on January 21, 2026, tested positive for the measles virus. Wastewater monitoring occurs in sewage and does not mean that drinking water is unsafe, BCHD says…