California, USA / Bangkok, Thailand – July 2026 — Under the new California SB 20 STOP Act and updated Cal/OSHA regulations, California enforces a strict ban on the fabrication, cutting, grinding and installation of high crystalline silica engineered quartz slabs with over 1% crystalline silica. As America’s first state to restrict high-silica quartz stone surfaces, the new rule forces US quartz distributors and local fabricators to phase out non-compliant inventory and adopt safety-certified quartz countertop slabs for all residential and commercial projects. Official policy sources: CA SB20 Legislative Text: https://legiscan.com/CA/text/SB20/2026
Traditional engineered quartz stone with high respirable crystalline silica creates serious workplace health hazards and fails 2026 California safety compliance. For US stone distributors, non-compliant high-silica quartz slabs now face sales and construction restrictions, making low crystalline silica engineered quartz a mandatory inventory upgrade for the California and broader US market.
Focused exclusively on the US market, THAI QUARTZ STONE offers the perfect regulatory solution: NSF-certified zero-silica quartz slabs. Our zero silica quartz surfaces, fully exempt from the California silica ban and compliant with Cal/OSHA and national US interior safety standards. All bulk wholesale quartz slabs are equipped with complete NSF certification for inspection, project bidding and nationwide distribution.
Our zero-silica premium quartz slabs retain full premium quartz performance: stain-resistant, scratch-proof, and non-porous. Featuring popular marble-look, concrete-style and other basic designs, our US-grade quartz fits California residential remodels and commercial construction projects. We provide standard US jumbo/super jumbo sizes, 20mm/30mm custom thickness, private label service and competitive bulk pricing, helping US quartz distributors quickly replace banned high-silica inventory and capture the compliant quartz market.
With more U.S. states planning similar silica restrictions, THAI QUARTZ STONE’s product line delivers future-proof US regulatory compliant quartz surfaces. We support long-term North American quartz distribution partners with stable compliant quartz stone slabs and full documentation for sustainable US market expansion.
