Measles emerges in California wastewater as health experts sound alarm
California health officials have detected measles in wastewater, indicating potential undetected circulation of the virus. The state has reported a significant increase in measles cases, with 74 infections confirmed across seven counties this year. Health experts warn that low vaccination rates in certain communities are contributing to the outbreak, which reflects a national trend of rising measles activity.
- ▪The Merced County Department of Public Health found evidence of measles in wastewater testing.
- ▪California has recorded 74 measles cases this year, the highest total in seven years.
- ▪Approximately 96% of those infected are unvaccinated or have an unknown vaccination status.
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Metro Measles emerges in California wastewater as health experts sound alarm By Daniel Farr Published June 6, 2026, 9:41 p.m. ET See more of our coverage in your search results. Add The California Post on Google California health officials discovered evidence of measles in routine wastewater testing as the state faces a sharp resurgence of the disease. The Merced County Department of Public Health reported the finding, and while no confirmed clinical cases have been identified in the county, officials said it could indicate undetected circulation. 4 Jelena – stock.adobe.com The state has confirmed infections climbing to 74 cases across seven counties, the highest annual total California has recorded in seven years.
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