Silicosis Lung Disease Emerges in Countertop Industry Workers

In kitchens and bathrooms across America, gleaming quartz countertops have become a symbol of modern home renovation. What most homeowners don't know is that the $30 billion engineered stone industry powering their upgrades has unleashed what physicians are calling "the largest outbreak of silicosis in decades" [1] — an irreversible lung disease that is killing workers in their 30s and 40s, most of them Latino immigrants whose labor shapes the stone but whose suffering remains largely invisible.

A 19th-Century Disease Returns with a Vengeance

Silicosis was once synonymous with coal mining and sandblasting — a disease of deep tunnels and industrial foundries that plagued workers throughout the 19th and 20th centuries. Regulations, improved ventilation, and workplace reforms had largely pushed it to the margins of occupational medicine. Then came engineered stone.

Unlike natural granite, which contains roughly 30% crystalline silica, or marble at less than 10%, engineered stone products — marketed under brands like Caesarstone, Cambria, and Cosentino's Silestone — pack up to 95% crystalline silica into their slabs [1][2]. When workers cut, grind, and polish these surfaces, the process pulverizes the material into a fine, respirable dust that embeds deep in lung tissue.

"When you grind it, when you cut it, you're pulverizing it. You're weaponizing the silica," said Dr. Robert Blink, an occupational medicine specialist [1].

The result is a form of silicosis that progresses with terrifying speed. Classic silicosis, associated with decades of mining exposure, typically develops over 15 to 20 years. In engineered stone workers, severe disease is appearing after just a few years on the job [3]. Israeli physicians documented aggressive silicosis in young countertop workers as early as 1997, but global awareness lagged as the product's popularity surged [1].

The Numbers Behind the Crisis

California, home to a concentration of fabrication shops in the San Fernando Valley and throughout Los Angeles County, offers the most comprehensive data. The state designated silicosis a reportable disease in 2025 and has maintained active surveillance since 2019 [4].

The numbers are staggering and growing. As of early March 2026, California has confirmed 519 cases of engineered-stone-associated silicosis and 29 deaths [1]. The median age at diagnosis is 46; the median age at death is just 49 [1][4]. Over 60 workers have been referred for lung transplants — the only disease-modifying treatment for end-stage silicosis — with at least 30 receiving transplants [4][5]. Median survival for transplanted lungs is approximately eight years [1].

Source: California Department of Public Health / CBS News / AJPH

Data as of Mar 13, 2026CSV

But California's cases represent only a fraction of the national toll. An estimated 100,000 stone fabricators work across the United States [6], and silicosis is not a nationally reportable disease. Cases have been documented in Texas, Florida, Colorado, Washington, Indiana, and the Northeast [2][7]. Without a comprehensive federal surveillance system, the true scope remains unknown.

"We're missing cases. There's no national surveillance system for this," said Dr. Sheiphali Gandhi, a UCSF pulmonologist [1].

A CDC/NIOSH initiative is attempting to build a nationwide facility list, having identified 19,316 companies through web-scraping and automated searches, with 9,410 having email addresses for outreach [8]. California's own effort to map fabrication shops found 653 confirmed fabricators, 480 of which employed fewer than 10 workers — small shops that are hardest to inspect and regulate [8].

The Human Toll: Young Men, Stolen Futures

The faces of this epidemic share a common profile: young, male, Latino, immigrant. In California, nearly all confirmed cases have occurred among immigrants from Mexico (62%), El Salvador (27%), and elsewhere in Central America [5]. These are men who came seeking opportunity and found a lethal trade.

César Manuel González was 37 when he was diagnosed with silicosis in 2023. He had started in the stone business working with marble and granite, but after the 2008 recession, engineered stone dominated the market and his work shifted accordingly. By the time doctors delivered the diagnosis, his lungs were too damaged to sustain him. He received a transplant — an operation that traded one form of fragility for another, requiring daily anti-rejection drugs and constant vulnerability to infection [1].

Gustavo Reyes was 36 when a doctor told him he had three to five years to live. He had worked with water-based cutting — one of the safety measures industry advocates promote — but experienced heavy dust during finishing and sanding. He received a lung transplant in 2023, at age 34, and later became the lead plaintiff in a landmark lawsuit [1][6].

In August 2024, a Los Angeles jury assessed more than $52 million in damages in the Reyes case, finding Caesarstone USA bore 15% of the responsibility and Cambria 10% [9]. Twenty-nine other manufacturers had already settled out of court. Over 370 lawsuits from affected workers are now pending against engineered stone manufacturers, and one law firm alone has secured nearly $200 million in settlements [10][11].

Regulatory Whiplash: California Acts, Washington Stalls

The policy response to this crisis has been deeply uneven, revealing a fault line between state-level worker protection and federal industry deference.

California's STOP Act: Governor Gavin Newsom signed the Silicosis Training, Outreach, and Prevention (STOP) Act — Senate Bill 20 — into law on October 13, 2025, with full force taking effect January 1, 2026 [12]. The law bans dry-cutting techniques for any work on stone containing more than 0.1% crystalline silica, requires continuous water application during cutting and grinding, mandates fabrication shop certification, and classifies silica-related illness as a serious injury under the Labor Code. Starting July 1, 2026, employers must submit annual written attestations to Cal/OSHA confirming that employees performing high-exposure tasks have completed mandatory training [12].

OSHA's Federal Framework: The federal Occupational Safety and Health Administration updated its silica exposure limits in 2016 but does not distinguish between natural and engineered stone — a critical gap given the radically different silica concentrations [1][13]. In September 2023, OSHA announced a focused inspection initiative for engineered stone fabrication and installation [13]. Enforcement actions have followed: in August 2024, a Chicago countertop maker was fined over $1 million after inspectors found employees exposed to silica levels six times the permissible limit [13].

Yet compliance remains dire. California inspections found that 51% of stone fabrication shops had employees exposed to respirable crystalline silica above the permissible limit of 50 micrograms per cubic meter [8]. NPR reporting indicates at least 25% of shops continue dry-cutting stone [6].

Source: CDC / PMC / OSHA

Data as of Mar 13, 2026CSV

The Industry's Federal Shield: While California tightens restrictions, some federal lawmakers have moved in the opposite direction. In January 2026, the House Judiciary Subcommittee convened a hearing on H.R. 5437 — the "Protection of Lawful Commerce in Stone Slab Products Act" — introduced by Rep. Tom McClintock (R-CA). The bill would grant sweeping immunity to manufacturers and distributors of crystalline silica artificial stone slabs from state and federal civil claims related to injuries or illnesses caused by their products [6][11].

"They've got it backwards. It's not the lawsuits that should be banned, it's the stone slabs that should be banned," argued Raphael Metzger, an attorney representing affected workers [6].

David Michaels, former head of OSHA, called the legislation "a death sentence for workers in this industry," drawing a parallel to the tobacco industry's decades-long effort to avoid liability. "This is comparable to the tobacco industry saying cigarettes are safe," he said [1][6].

The Australia Precedent

The United States is not the first country to confront this crisis — but it may be the slowest to act.

Australia, after experiencing a wave of silicosis among engineered stone workers, took decisive action. In December 2023, workplace health and safety ministers unanimously agreed to ban the use, supply, and manufacture of engineered stone. The ban took effect on July 1, 2024, making Australia the first country in the world to prohibit the material [14]. Importation of engineered stone benchtops, slabs, and panels was banned from January 1, 2025 [14].

The Australian government projected that the ban would prevent approximately 100 lung cancers and 1,000 silicosis cases over the lifetime of Australian workers across the entire supply chain [14]. Limited exceptions exist for removing, repairing, or disposing of legacy installed engineered stone.

The ban had an immediate market effect: manufacturers began reformulating products with lower silica content to maintain access to the Australian market. Caesarstone introduced products with less than 1% silica in mid-2025, and Cosentino shifted one-third of its portfolio — including most new collections — to below 10% crystalline silica [1].

An Industry Divided

The engineered stone industry's response reveals a sector caught between liability and profit.

Manufacturers argue that their products can be fabricated safely when employers implement proper engineering controls: wet cutting, local exhaust ventilation, and respiratory protection. Cambria's chief legal officer, Rebecca Shult, stated at the January congressional hearing: "This demonstrates that quartz can be fabricated safely...Our workers are protected" [6].

But this argument shifts responsibility from the companies that engineer and sell a product containing 95% of a known carcinogen to the thousands of small fabrication shops — many employing fewer than 10 workers — that cut and install it. Critics note that Cambria CEO Marty Davis is a major Republican political donor, a detail that has drawn scrutiny to the timing and sponsorship of the industry immunity bill [1][6].

The legal comparison to the tobacco and asbestos industries is increasingly apt. In both cases, manufacturers argued that their products were safe when used properly while knowing the inherent risks. Litigation ultimately proved to be the primary driver of product reformulation and industry accountability.

"If the immunity bill passes, what incentive do these companies have to change their products?" asked Alice Berliner of Los Angeles County Public Health. "Each number is a partner, a friend, a parent, a child, or a sibling" [6].

The Path Forward

The silicosis epidemic among engineered stone workers sits at a crossroads defined by three competing forces: the pace of regulation, the power of litigation, and the urgency of a still-growing body count.

California's surveillance data confirms the disease trajectory has not plateaued. The state's Occupational Safety and Health Standards Board is actively considering a ban on cutting engineered stone with high silica content — a move that would mirror Australia's approach [6]. Federal action, by contrast, remains paralyzed between OSHA's incremental enforcement and congressional efforts to insulate manufacturers.

For the estimated 100,000 countertop fabricators working across the country — and the unknown number already exposed but not yet diagnosed — time is the one resource they cannot afford to waste. Silicosis is irreversible. The lungs do not heal. And every day that a worker dry-cuts a slab of engineered stone without adequate protection, the epidemic grows.

The gleaming countertops in America's kitchens were built to last a lifetime. For the workers who shaped them, the question is whether they will live long enough to see one installed.