California Weighs First Statewide Ban on Quartz Countertops After Deadly Lung Disease Cases

California regulators are considering what would be the first statewide ban on engineered stone, the quartz-based material that has become a standard choice for kitchen and bathroom countertops. The proposal comes as the state's count of silicosis cases tied to the product keeps climbing. California has confirmed 660 cases and 35 deaths.

Silicosis is an incurable lung disease caused by breathing in fine crystalline silica dust. Engineered stone is made mostly of silica, and the dust is released whenever the slabs are cut, ground, or polished. That makes fabricators, installers, and other workers in the trade the most exposed, and many of the people affected were doing this work for years before they were diagnosed. Because the illness can take a long time to appear, the toll often becomes visible well after the exposure happened.

For the housing market, the stakes reach beyond the stone shops. Quartz is among the most common countertop picks in kitchen remodels and new construction, so a statewide ban would touch homeowners planning renovations, builders working on tight schedules, and distributors that stock the slabs. Contractors would need to shift to other surfaces, and buyers who had their hearts set on the look could face fewer options and possibly higher costs as supply adjusts.

No final decision has been announced. The current reporting does not settle when regulators might act or how a rule would apply to countertops that are already installed, and those details will shape how much the change affects the market. For now, anyone planning a kitchen or bath project in California will want to watch the process closely, and renovation professionals will want to keep an eye on what replacement materials the rules leave open.