California study links hundreds of silicosis cases to quartz countertop work
A state health report found a sharp rise in silicosis among California workers handling quartz countertops, with more than 600 cases identified since 2019 and dozens of deaths and transplants.
A California Department of Public Health report released this week documented a rapid increase in silicosis cases among workers who fabricate and install quartz countertops. The study recorded 631 confirmed cases since 2019, up from 31 in that year, and noted 31 deaths and 65 lung transplants linked to the disease.
The condition, caused by inhaling crystalline silica dust, has predominantly affected men with a median age of 52, and about half of the cases are concentrated in Los Angeles County. Researchers said the true number of affected workers is likely higher because many cases go undiagnosed or are diagnosed late.
"Hundreds of workers have been sickened making quartz countertops, a product we do not need, especially when a safer alternative is available," said David Michaels, co-author of the report and professor at George Washington University.
California OSHA, which issued emergency safety standards for artificial stone in 2023, reported that 94% of inspected shops were non-compliant. The agency warned that continued commercial availability of quartz could push non-compliant operations underground, increasing risk.
State regulators are considering a full ban on quartz countertop production, following similar measures in Australia, despite pushback from industry groups.