No—not as of October 8, 2026. California had not adopted a general ban on new quartz countertops or a consumer-sales ban. The state was considering an emergency workplace rule that could restrict fabrication and installation of artificial stone containing more than 1% crystalline silica. Its final text, coverage and effective date remained undecided.
What California is considering
In May 2026, the Occupational Safety and Health Standards Board granted Petition 609 in part and directed Cal/OSHA to prepare an emergency rulemaking process. A discussion draft dated September 16, 2026, was posted for comment. The official record describes a proposed occupational rule and advisory process—not an adopted regulation with an effective date. California DIR/Cal/OSHA’s artificial-stone rulemaking page has the current status and draft materials.
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The proposal concerns work fabricating and installing artificial stone with more than 1% crystalline silica. That is different from a law barring Californians from purchasing countertops. The final rule could still change which materials or activities it covers, as well as its threshold and timing.
Can you still buy quartz countertops in California?
The proposed rule is not a general consumer-sales ban, and the state had not adopted a final restriction on new countertops as of October 8, 2026. The proposal focuses on fabrication and installation work. Whether a particular product or job would be covered depends on the final regulation and the material’s composition; “quartz” on a product label alone does not establish its legal classification.
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No start date for a ban has been published. There is no effective date to give while the rule remains proposed. Check the official rulemaking page for changes to the draft and process.
What protections already apply to workers?
California’s permanent general-industry silica standard, Title 8 section 5204, took effect February 5, 2025. Cal/OSHA’s September 2026 summary identifies high-exposure tasks involving artificial stone with more than 0.1% crystalline silica, including cutting, drilling, abrading, grinding, polishing, and related waste handling or cleanup. The existing standard’s enhanced protections include wet methods, safe housekeeping, restrictions on unsafe practices, respiratory protection, medical surveillance and removal protections, and reporting of silicosis and lung cancer. See Cal/OSHA’s silica regulation information and Title 8 section 5204.
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The proposed threshold of more than 1% and the current enhanced-protection trigger of more than 0.1% describe different regulatory measures and stages. The proposal is not the source of the protections already in force.
Why the rule is focused on fabrication
Crystalline silica becomes a serious occupational concern when work such as cutting or grinding releases respirable dust. California officials adopted an emergency silica standard in December 2023 amid silicosis cases among stone fabrication workers. In a December 14, 2023 release, the California Department of Industrial Relations reported 95 identified worker cases since 2019 and 10 deaths. That is a dated historical count, not a current total. The department described silicosis as an incurable, progressive disease that can have serious and fatal effects. California DIR’s December 14, 2023 announcement.
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In December 2024, the Standards Board voted to make emergency protections permanent. The state described those protections as covering workers fabricating countertops and similar products made from artificial stone and natural stone with more than 10% crystalline silica; the permanent standard took effect February 5, 2025. California DIR’s December 2024 announcement.
Does the proposal include porcelain or existing countertops?
California’s existing Title 8 definition of “artificial stone” covers reconstituted, artificial, synthetic, composite, engineered or manufactured stone, commonly made by combining silica-containing materials with adhesives, polymers, epoxies, resins or other binders. Fired ceramic and porcelain tiles and panels are expressly excluded from that definition. That does not establish that every product described as porcelain—or every surface made with a different process—is outside a future rule. Confirm the product’s composition and consult the final rule’s definitions once adopted. Title 8’s artificial-stone definition.
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The proposal is about fabrication and installation, not retroactively banning countertops already installed in homes. The available status record does not set out a transition plan or a final treatment of existing materials; those details should not be assumed before the rule is finalized.
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What about silica-free alternatives?
Petition 609 argues that silica-free alternatives available in Australia could be made available in California if a similar restriction is adopted. That is the petitioner’s claim, not confirmation that a particular substitute is currently sold in California or that all alternatives perform alike. If comparing surfaces, verify crystalline-silica content and legal classification, California availability, durability, maintenance, appearance and installed cost. The cited sources do not provide comparative performance data or current prices, so they do not support ranking or recommending a named countertop material. Petition 609.
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How SB 20 fits in
SB 20, signed in October 2025, is described by the Standards Board as providing additional tools and protections for Cal/OSHA. It is separate from Petition 609’s rulemaking path and is not an enacted general ban on quartz countertops. Standards Board information on SB 20.
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