California STOP Act targets state’s fabricated stone industry

A rise in silicosis cases among workers in the fabricated stone industry led to California’s Silicosis, Training, Outreach, and Prevention (STOP) Act, which was signed into law October 13 by Governor Gavin Newsom. The Act takes effect January 1, 2026. It prohibits dry cutting of stone countertops, mandates employee training, and classifies silicosis and silica-related lung cancer from artificial stone as a serious injury or illness.

In addition, beginning on July 1, 2026, and annually thereafter, impacted employers must electronically submit a written attestation to Cal/OSHA that each employee who performs high-exposure trigger tasks has received appropriate training. Training requirements are outlined in Section 5204 of Title 8 of the California Code of Regulations.

Silicosis is caused by the inhalation of respirable dust containing crystalline silica. When small particles of silica get into the lungs, they can cause permanent scarring and difficulty breathing, as well as lung cancer, kidney damage, and several autoimmune diseases. Workers who cut, grind, and polish stone slabs containing crystalline silica are at risk if appropriate measures are not taken.