California Moves to Ban Quartz Countertops Amid Health Concerns

California’s workplace safety officials voted unanimously on Thursday to initiate a groundbreaking ban on the production and installation of artificial quartz kitchen countertops. This decision responds to a rising health crisis linked to silicosis, a serious and incurable lung disease affecting workers who craft this material.

Despite efforts in recent years to enforce strict dust-control measures, health experts believe that such regulations have not effectively curbed the alarming rates of silicosis diagnoses and fatalities. This led to the board pursuing an emergency rulemaking process.

According to officials, respirable crystalline silica is identified as the main factor contributing to this public health issue. While natural stones like marble have less than 5% silica content, and granite ranges from 10% to 50%, engineered quartz can contain over 90% crystalline silica, combined with resins and pigments.

Workers who handle these synthetic slabs often inhale tiny silica particles without adequate safety measures, leading to severe lung damage. This exposure can lead to a fast-tracked form of silicosis that inflicts “severe scarring, rapid lung failure, and a decline that medications can’t reverse,” as stated by CAL OSHA. For many affected individuals, a risky lung transplant might be the only option, and even then, it may only prolong life by a few years.

Recent data from the California Department of Public Health indicates that silicosis cases among countertop workers have skyrocketed to more than 560, with at least 31 reported deaths attributed to the disease.

The move to ban quartz stems from a petition by the Western Occupational and Environmental Medical Association, which urged the California Occupational Safety and Health Standards Board to prohibit any manufacturing or handling of engineered stone containing more than 1% crystalline silica due to safety concerns.

Manufacturers have often opposed such bans, contending that issues arise from poor practices rather than the material itself, and claiming that similar risks exist with natural stones like quartzite if safety protocols are disregarded.

On the flip side, safety advocates highlight that the extremely high silica concentration in quartz creates a very narrow margin for safe handling, often overwhelming common safety equipment and ventilation methods.

With this ban, California becomes the first state to outlaw this material, following Australia’s 2024 decision to impose a complete ban on engineered stone.

Cal OSHA has conducted over 140 inspections targeting non-compliant shops and has shut down numerous unsafe facilities. Yet, health data suggests that the disease is still spreading faster than regulations can address.

Experts believe this regulatory shift will significantly alter the landscape of consumer design, pushing the market toward natural stones or alternative materials.