On September 16, 2026, California’s Division of Occupational Safety and Health posted a discussion draft for an emergency rule that would restrict manufacture, fabrication and installation of artificial-stone countertops and similar products containing more than 1% crystalline silica. The draft is open for comment through September 30 and still requires further regulatory action.

For buyers, the right response is not to treat the proposal as an existing statewide ban. The practical step is to prepare: classify materials, organise crystalline-silica documentation, identify California projects, increase controlled off-site prefabrication where appropriate, and maintain alternative material paths.

Four Things Buyers Must Separate

Question	Current position
Is the rule already in force?	No. It is a discussion draft still under review.
What threshold is proposed?	More than 1% crystalline silica for artificial stone, subject to final text.
Is this only about selling material?	No. The draft focuses on manufacture, fabrication and installation activities.
Does 'zero silica' automatically mean compliant?	No. Final definitions, documentation and work-practice requirements still matter.

 

1. Procurement Will Need Evidence, Not Only Product Names

If regulation continues in this direction, a quotation line saying 'Quartz' or 'Zero Silica' will be insufficient. Buyers, fabricators and contractors will increasingly need traceable material information and supporting test documentation.

The useful evidence chain becomes: product/formulation system → representative specimen → test method → crystalline-silica result → document version → project-specific review.

2. Off-Site Prefabrication Becomes More Important

The discussion draft also addresses on-site fabrication and cutting, leaving only limited room for minor fit adjustments to prefabricated pieces. Even if the final text changes, the direction is clear: cutting, drilling, edging and complex fabrication should increasingly move into controlled factory environments.

Wayon Stone can support cut-to-size, CNC cut-outs, 45-degree mitres, integrated basins and special fabrication based on confirmed drawings and project requirements, with numbered packing to support site identification.

Six Actions U.S. Countertop Buyers Can Take Now

Action	Why it matters now
1. Build a material register	Separate conventional high-silica engineered stone, low/zero-silica formulations, porcelain and natural stone
2. Organise silica documentation	Retain technical evidence, not only marketing names
3. Flag California projects	Track them separately as the rulemaking develops
4. Increase prefabrication	Move cutting, drilling and edge work off site where practical
5. Retain order/batch records	Transition provisions may depend on purchase, contract or inventory timing
6. Prepare alternatives	Keep at least one technically suitable lower-silica or alternative surface route

 

Wayon Zero-Silica Surfaces: What Representative Data Shows

Wayon offers multiple products based on zero-silica formulations. Existing data comes from representative submitted samples and demonstrates the technical performance of the relevant formulation system; it does not mean every colour or design has been individually tested to identical results.

Representative test item	Result	Procurement use
Crystalline silica	<1%; quartz and cristobalite not detected	Reference for the relevant zero-silica formulation system
Water absorption	Average 0.01%	Surface-density reference
Compressive strength	Dry avg. 197 MPa; wet avg. 203 MPa	Load-performance reference
Flexural strength	Dry avg. 47.6 MPa; wet avg. 53.3 MPa	Bending-performance reference
Impact resistance	Average 9.05 J	Impact-performance reference

 

Crystalline Silica Is Not the Only Buying Criterion

Countertop buyers still need to evaluate water absorption, strength, impact resistance, appearance, fabrication, cut-outs, edge details, packing and replenishment. A lower silica number alone does not make a surface suitable for every project.

A better sequence is: worker-safety and regulatory requirements first, then performance, design and total delivered cost among technically suitable materials.

Comparing Material Paths

Material route	Potential procurement value	Key checks
Low/zero-silica surfaces	Maintains familiar engineered-surface design/fabrication logic	Silica evidence, final regulatory classification, fabrication
Porcelain/sintered slabs	Fired surface with a different regulatory/material route	Fabrication, edges, handling and installation
Natural stone	Natural appearance and premium positioning	Composition, selection, variation, fabrication safety and local rules
Other new surfaces	Alternative formulation/performance routes	Composition, testing, durability and project suitability

 

One Recommendation for U.S. Importers and Fabricators

Do not wait for a final rule before requesting better supplier documentation. Add material classification, crystalline-silica evidence, prefabrication capability, batch traceability, fabrication drawings and alternative-material planning to supplier due diligence now.

FAQ

Has California already banned quartz countertops?

No. The September 16, 2026 document is a discussion draft and remains in the comment/review process.

Why does the draft use a 1% crystalline-silica threshold?

The current discussion text targets artificial stone above 1% crystalline silica. Final definitions and thresholds must be checked in the adopted rule.

Does a representative Wayon result below 1% guarantee future compliance?

No. It is important technical evidence, but final compliance also depends on adopted material definitions, documentation, fabrication/installation rules and project requirements.

Should U.S. projects increase overseas prefabrication?

For well-defined countertop packages, factory cutting, drilling and edging can reduce on-site fabrication, but logistics, installation and final regulatory requirements must be considered.

What should buyers request from suppliers now?

Material information, relevant crystalline-silica test documentation, fabrication capabilities, batch traceability, technical-document indexes and alternative-material options.

About Wayon Stone

Founded in 1982, Wayon Stone supplies quartz, zero-silica surfaces, inorganic terrazzo, Wayon Flexible Stone (MCM Stone), natural marble and porcelain slabs to global B2B project, contractor, wholesale, countertop/cabinet and furniture customers, together with project-oriented fabrication.

For U.S. countertop and project enquiries, buyers can provide the project state, material direction, dimensions, fabrication drawings and technical requirements for further review.