California Prepares to Ban Quartz Countertops as Silicosis Crisis Deepens

Key points

• California’s Division of Occupational Safety and Health (Cal/OSHA) is pushing for an emergency regulation to ban engineered stone with over 1% crystalline silica.
• The ban targets the fabrication and installation of quartz countertops, which generate hazardous silica dust when cut or polished.
• Since 2019, California has diagnosed 662 silicosis cases in this sector, resulting in 35 deaths and 75 lung transplants.
• The regulation follows Australia’s 2024 nationwide prohibition, which was implemented after enforcement alone failed to stop the disease.
• Critics note that California can only regulate workplaces, not the entire supply chain, potentially driving non-compliant shops underground.

Background

Our earlier coverage in October 2026 highlighted that silicosis cases in California surged from 31 in 2019 to 631 by mid-2026, disproportionately affecting male workers in Los Angeles County. The current push for a ban reflects the failure of existing safety standards to prevent irreversible lung scarring among fabricators.

How outlets are covering it

The Times of India emphasizes the 'crisis' nature of the situation and the limitations of California’s regulatory power compared to Australia’s total supply chain control. CNET highlights the broader health risks of crystalline silica, noting that symptoms can take 15 to 20 years to appear and that 2.3 million US workers are exposed. While both sources agree on the ban’s necessity, The Times of India warns of potential underground markets, whereas CNET focuses on the global market size and alternative materials like soapstone or wood.

Why it matters

This ban could set a precedent for other US states and reshape the $14.8 billion global quartz market. It addresses a critical occupational health gap where current regulations have failed to protect workers from incurable lung diseases, potentially influencing future federal safety standards.

What to watch

The California Occupational Safety and Health Standards Board is expected to finalize the emergency regulation in October 2026. If passed, it will prohibit the fabrication and installation of high-silica engineered stone, forcing a shift toward safer alternatives and potentially prompting other states to follow suit.