California silicosis cases tied to engineered stone

California health officials report 592 confirmed silicosis cases among workers fabricating engineered-stone countertops since January 2019 through June 2026, with 31 deaths and 65 lung transplants, highlighting a severe, largely young, and predominantly male workforce affected. Engineered stone typically contains more than 90% crystalline silica, and workers are exposed during cutting, grinding, and polishing processes. The cases show a median diagnostic age of 46 and a median death age of 52, with a median exposure duration of 22 years; nearly all patients were men and about 98% were Latino, underscoring notable demographic patterns. Public health officials warn that the actual burden is likely underestimated due to passive reporting and surveillance gaps, as silica-related diseases can progress rapidly and involve co-occurring conditions. California has responded with stricter regulations, including mandatory water-based tools, dust-control measures, and powered air-purifying respirators; silicosis was made a reportable disease in 2025, with safety rules codified by SB 20. The findings call for continued surveillance and enforcement to prevent exposure and address ongoing health risks in the stone-countertop industry.