https://www.siliconvalley.com/2021/07/10/map-california-outbreak-records/

At the start of the year, California adopted a law that was intended to increase transparency around workplace outbreaks of COVID-19. But many counties have continued to keep the information secret, a recent Bay Area News Group investigation found.

This news organization requested specific workplace outbreak data — including names of worksites, dates, locations and numbers of cases — from all 58 California counties and the three cities with their own public health departments. So far, about a third have produced records. Seventeen flatly declined to provide the information, arguing without evidence that naming employers who have reported outbreaks risks individual employees being identified.