"The inspectors concluded they couldn’t investigate because OSHA is banned from enforcing safety laws on farms with fewer than 11 workers unless they have employer-provided housing known as a “temporary labor camp.”

Since 2009, at least 17 workers, most of them immigrants, have died on Wisconsin dairy farms. Twelve of the deaths happened on farms with fewer than 11 workers. OSHA did not inspect eight of those 12, each time citing the small farms exemption."

https://www.propublica.org/article/wisconsin-dairy-farms-osha-safety-death-investigation-immigrant-workers