Independent research & data-organization project
California's Forgotten Past
The Arsenic Cattle-Dipping Era
An independent investigation into California's state-mandated arsenical cattle-tick dipping program (1907 to 1912), and the South Orange County communities later built on that former ranch land.
This is an independent research and data-organization project. It does not provide medical
advice and does not establish that any pesticide, property, organization, school, water
provider, agency, or other party caused any illness. Publicly reported health events may
not have been independently medically verified. Geographic and temporal overlap does not
establish exposure or causation. No soil has been tested and no contamination is asserted for
any community named here.