Calif. Bill Would Require Certification for Stone Fabrication Shops

Why It Matters

By formalizing oversight of silica‑generating operations, the bill aims to reduce silicosis risk and protect a vulnerable workforce, while creating a compliance framework that could become a model for other states.

Key Takeaways

• California mandates certification for stone fabrication shops.
• Certification required by Jan 1, 2028, three-year terms.
• Non‑certified shops face penalties starting July 1, 2028.
• Suppliers and contractors must verify certification status.
• Program funds enforcement via Slab Fabrication Activity Account.

Pulse Analysis

Engineered stone and natural‑stone fabrication have long been associated with high levels of respirable crystalline silica, a pollutant linked to silicosis, lung cancer and other respiratory illnesses. Despite federal OSHA standards, many California workshops operate with limited monitoring, relying on ad‑hoc dust‑control measures that often fall short. The state’s occupational safety record shows a steady rise in silica‑related claims, prompting legislators to seek a more systematic approach. A targeted certification regime promises to close gaps that generic regulations have left open, aligning workplace practices with the latest health science.

Assembly Bill 2137 places the Department of Industrial Relations, through Cal/OSHA, in charge of designing an application and inspection protocol that will issue three‑year certifications to compliant shops. To qualify, fabricators must demonstrate continuous air‑monitoring, effective dust‑suppression systems and valid workers‑comp coverage. The law extends responsibility downstream: material suppliers must verify that their buyers hold a current certification, and contractors hiring fabricators must confirm the same before releasing stone slabs. Non‑compliance will trigger citations and civil penalties after July 1, 2028, creating a clear financial incentive for early adoption.

The certification fund, housed in a newly created Slab Fabrication Activity Account, will finance inspections, data collection and public health reporting, providing a feedback loop that could lower silicosis incidence statewide. For the industry, the upfront costs of compliance may be offset by reduced liability and improved market credibility, especially as buyers increasingly demand proof of safe production practices. If successful, California’s model may inspire similar legislation in other high‑risk states, reshaping the regulatory landscape for stone fabrication across the United States.