California workplace regulators are weighing a rare move that could reshape kitchen showrooms across Los Angeles: a potential ban on fabricating and installing engineered stone, the glossy quartz countertops that have become a go-to in remodels, after a surge of devastating lung disease among countertop workers. What started as a technical rulemaking fight has turned into a high-stakes public health and legal showdown, with doctors, enforcement officials, and juries all turning up the heat for tougher action.
What Regulators Are Weighing
In December, the Western Occupational and Environmental Medicine Association formally petitioned the state Occupational Safety and Health Standards Board to prohibit fabrication and installation of engineered stone that contains more than 1% crystalline silica. The group argued that eliminating high-silica engineered stone is the only reliable way to prevent more deaths among workers who cut and polish the material. In the petition, the association wrote that "the evidence is now clear that engineered stone containing crystalline silica is too toxic to be safely fabricated," urging expedited rulemaking. The filing has become a centerpiece of a broader push that has brought sick workers and occupational health specialists to testify directly to state regulators. (WOEMA petition)
Numbers Climb And Public-Health Tracking
State and county disease tracking show the outbreak is both large and still growing. Surveillance dashboards now report more than 500 confirmed silicosis cases among countertop workers and roughly three dozen deaths since 2019. One recent county health report tallied 529 confirmed cases and 29 deaths as of March 12, 2026. (San Diego County report; see also CDPH silicosis dashboard.)
Enforcement Has Stepped Up
As the case counts rise, regulators say they are leaning harder on enforcement. The Standards Board adopted emergency silica protections in late 2023, and Cal/OSHA has followed with inspections, citations and orders targeting shops that dry-cut slabs or fail to provide required respiratory protection. The Department of Industrial Relations says the board has since made the emergency rules permanent to strengthen worker protections and to create a formal path for additional action if needed. (Department of Industrial Relations)
Courtroom Fallout And Legal Pressure
The legal pressure has ratcheted up alongside the public-health alarms. Juries and plaintiffs' firms have secured substantial awards against manufacturers and distributors, undermining industry arguments that better workplace controls alone can solve the problem. In one closely watched Los Angeles case in 2024, a jury returned a verdict of about $52.4 million for a former fabricator who developed accelerated silicosis after years spent cutting engineered stone slabs. (Los Angeles Times)
Industry Response And Next Steps
Manufacturers and trade groups are pushing back with their own plan, arguing that engineered stone can be worked safely if employers follow strict controls. They have floated voluntary certification programs and training as alternatives to a ban, pointing to engineering controls and protective gear as the answer. Others in the debate counter that the market can shift to lower-silica materials, noting that Australia has already moved in that direction. At recent public hearings, industry witnesses have urged regulators to lean on certification programs, while physicians and worker advocates have warned that self-policing will not stop otherwise preventable deaths. (KQED)
What To Watch
The Occupational Safety and Health Standards Board is scheduled to hold its next public meeting on May 21, 2026, in Los Angeles, where members are expected to continue taking testimony and to weigh how to respond to the petition and steadily rising case numbers. Until the board decides on any broader restrictions, regulators say they will keep leaning on inspections, stop-work orders and other enforcement tools in an attempt to bring exposures down. (Standards Board meeting schedule)
