Quartz Countertop Industry Linked to Silicosis Epidemic Among Workers

In kitchens and bathrooms across America, engineered quartz countertops have become a symbol of modern luxury — sleek, durable, and low-maintenance. But for the workers who cut, grind, and polish these slabs into shape, the material has become something else entirely: a death sentence.

A growing epidemic of silicosis, an incurable and often fatal lung disease, is tearing through the countertop fabrication industry, striking workers in their 30s and 40s with a ferocity that has stunned pulmonologists and drawn comparisons to the asbestos crisis of the 20th century. California alone has documented 519 confirmed cases and 29 deaths since 2019, and public health experts believe the true toll is far higher [1]. As the crisis deepens, a bitter fight has erupted over who bears responsibility — and whether the industry should be allowed to keep selling the product at all.

A Billion-Dollar Product With a Lethal Flaw

Engineered stone was pioneered by Israeli manufacturer Caesarstone in 1987 and has since captured roughly 29% of the U.S. countertop market, part of a global industry valued at approximately $18.4 billion [2]. The appeal is obvious: quartz surfaces resist stains, don't require sealing, and come in a range of colors that natural stone cannot match.

But there is a critical difference between engineered stone and its natural counterparts. While granite contains roughly 30% crystalline silica and marble less than 10%, engineered quartz slabs are composed of more than 90% crystalline silica — bound together with resins and pigments [3]. When workers saw, grind, or polish these slabs, the process generates clouds of ultra-fine silica dust. Inhaled into the lungs, those particles trigger irreversible scarring that progressively stiffens lung tissue until the organ can no longer function.

"When you grind it, you're weaponizing the silica," said Dr. Robert Blink, an occupational medicine specialist [4].

'Nobody Told Us It Was Dangerous'

Jose Peña, a 54-year-old Oakland resident, spent nearly two decades cutting quartz countertops. He once hauled 60-pound slabs with ease. Now he gasps for breath after walking short distances and faces the prospect of a lung transplant — a procedure that carries a two-in-five mortality rate within five years [1].

"Nobody told us it was dangerous," Peña said.

His story is tragically common. The median age at diagnosis among California's confirmed cases is just 46; the median age at death is 49 [4]. César Manuel González, 37, was diagnosed in 2023 and has already undergone a lung transplant requiring daily anti-rejection medications. Gustavo Reyes, diagnosed at 36, was told he had three to five years to live before receiving new lungs in 2023 [4].

Nearly all confirmed cases in California have occurred among immigrants from Mexico and Central America, many of them undocumented — a population that faces enormous barriers to healthcare access, employer-sponsored medical screening, and legal recourse [3]. In the Bay Area alone, more than 300 fabrication shops process quartz products, and the law firm Brayton Purcell counts 111 Bay Area clients diagnosed with silicosis [1].

The California Department of Public Health estimates there are roughly 4,000 workers in the state's stone fabrication shops. At the global rate of roughly 17% disease prevalence among engineered stone workers, that means an estimated 850 California workers — one in five — will develop silicosis, with approximately 160 expected deaths [1].

Source: KFF Health News / UCSF Research

Data as of Mar 17, 2026CSV

A Regulatory Patchwork

The crisis has exposed deep gaps in the regulatory framework meant to protect American workers. OSHA first adopted silica exposure limits in 1971 and updated them in 2016, but the rules regulate crystalline silica broadly and do not specifically address the unique hazards of high-silica engineered stone [5]. More critically, silicosis is not a nationally reportable disease, meaning there is no comprehensive federal count of cases.

"We're missing cases. There's no national surveillance system," warned Dr. Sheiphali Gandhi, a UCSF occupational disease specialist [4].

California has led the regulatory response. The state designated silicosis a reportable condition in 2025 and launched an Engineered Stone Silicosis Dashboard to track cases. In October 2025, Governor Newsom signed the STOP Silicosis Act (Senate Bill 20), which took effect January 1, 2026. The law forbids dry-cutting techniques, requires fabrication shop certification, mandates silicosis training, and classifies silica-related illness as a "serious injury" under the Labor Code [6].

But enforcement remains a challenge. Cal/OSHA has found that approximately 95% of fabrication operations violate existing safety regulations [7]. Many small shops operate with minimal oversight, and workers — particularly undocumented immigrants — are reluctant to report unsafe conditions for fear of retaliation or deportation.

Cases have been identified well beyond California, in Texas, Florida, Colorado, Illinois, Massachusetts, Washington, and Utah [7]. Yet most states have taken no specific action to address the epidemic.

Australia Bans the Product; America Debates Immunity

The sharpest contrast to the U.S. approach can be found in Australia, which on July 1, 2024, became the first country in the world to ban the manufacture, supply, processing, and installation of high-silica engineered stone [8]. The ban followed a 2022 study showing that more than one in five Australian stonemasons — 22.4% — had been diagnosed with silicosis. Australian regulators estimated the prohibition would prevent approximately 100 lung cancers and 1,000 silicosis cases over the lifetime of the country's workers [8].

In the United States, the debate has moved in the opposite direction. In September 2025, Republican Rep. Tom McClintock introduced H.R. 5437, the Protection of Lawful Commerce in Stone Slab Products Act, which would prohibit civil lawsuits against stone slab manufacturers for harm resulting from product fabrication [7]. The bill would also dismiss hundreds of pending lawsuits filed by sick and dying workers. A House Judiciary subcommittee held a hearing on the bill in January 2026 [9].

"Rather than hold the bad actors accountable, the lawsuits are being filed against dozens of innocent stone slab manufacturers," argued Cambria Chief Legal Officer Rebecca Schult [7].

Critics see the legislation as an attempt to replicate the liability shield that the gun industry secured through the Protection of Lawful Commerce in Arms Act. Rep. Hank Johnson rejected the bill as giving "preferential treatment" to manufacturers "while workers who cut, grind, polish... struggle to stay alive" [7].

Former OSHA director David Michaels drew an even sharper comparison: "This is comparable to the tobacco industry saying cigarettes are safe" [4].

Industry Response: Too Little, Too Late?

Some manufacturers have begun reformulating their products. In mid-2025, Caesarstone introduced its first products containing less than 1% silica. Spanish manufacturer Cosentino — whose owner received a six-month prison sentence in 2023 for gross negligence related to worker silicosis — launched a zero-silica product line in late 2025 and has moved one-third of its portfolio to below 10% silica content [1][4].

But Cambria, the largest U.S.-based quartz manufacturer, which owns its own quartz mine, has not reduced the silica content of its products. The company faces approximately 400 lawsuits from workers alleging silica-related injuries, including a $52.4 million jury verdict in a Los Angeles case — which Cambria is appealing [7][1].

Major retailers have responded unevenly. IKEA discontinued quartz countertops after August 2024 [1]. Home Depot, Lowe's, and Costco continue to sell high-silica engineered stone products, and either declined to comment or did not respond to press inquiries [1].

Source: California Dept. of Public Health / Mercury News

Data as of Mar 17, 2026CSV

The Legal Reckoning

The litigation wave is accelerating. More than 370 lawsuits have been filed nationally against manufacturers, with law firms arguing that companies knew for decades about the silicosis risk yet failed to adequately warn fabricators [4]. The first case of artificial stone silicosis was documented as early as 1997 in Israel — the same country where Caesarstone was founded [1]. Caesarstone began adding warning labels in 2010 but continued selling high-silica products.

Manufacturers have adopted a "pass the blame" defense, countersuing fabrication shop owners and arguing that silicosis results from employers' failure to implement proper dust controls — not from the product itself [1]. This strategy puts small, often immigrant-owned fabrication businesses in a legal vice between manufacturer lawsuits and sick workers seeking compensation.

What Comes Next

The trajectory of this crisis is being shaped by three competing forces. Public health experts and labor advocates are pushing for an Australian-style ban, arguing that no amount of workplace controls can make a 90%-silica product safe at the scale of a fragmented industry dominated by small shops with spotty compliance. Industry allies in Congress are pushing for manufacturer liability protection, which would effectively end the legal pressure driving reformulation. And state regulators are attempting a middle path of stricter workplace rules — an approach that California's own compliance data suggests is difficult to enforce.

Four dozen new silicosis diagnoses have already been reported in California in the first months of 2026 [1]. Each new case represents a worker, typically a young immigrant father, facing the prospect of a lung transplant or early death from a disease that was entirely preventable.

"Every person on the dashboard is one more failure of the public-health worker-safety system," said Dr. Gandhi of UCSF [1].

The quartz countertop on an American kitchen island may be pristine and gleaming. The lungs of the worker who shaped it are not.