Source registry

What the datasets rest on. Sources are ranked by the four-tier hierarchy in the methodology; notes record where a source could not be read in full from this project's network.

Published 12 September 2026Sources last checked 12 September 202638 recordsDownload: CSV JSON

Tier 1: primary. Court records, statutes, regulations, government agencies, journal indexes.

PublisherTitleDateAccessedNotes
California Department of Industrial RelationsStandards Board Advances Efforts to Protect Workers from Silicosis (News Release 2026-45)May 202612 September 2026Not reachable from this project's network; content read via the WorkCompWire reprint.
California Department of Public HealthEngineered Stone Silicosis Surveillance Dashboard202612 September 2026Updated weekly. The embedded dashboard cannot be read by this project's tools; figures are taken from CDPH publications and reporting that cites it.
California Department of Public HealthSilicosis Becomes a Reportable Disease in California (CAHAN advisory)17 November 202512 September 2026Reportable from June 2025; 7-day provider reporting; counts as of 13 Nov 2025 (432 cases, 25 deaths, 48 transplants; LA 226, Orange 86).
California Legislative InformationSB-20 Occupational safety: high-exposure trigger tasks on artificial stone (2025-2026)13 October 202512 September 2026Chaptered 13 Oct 2025, Chapter 734. Amends Labor Code 6302 and 6432; adds Chapter 2.2 (sections 6359.1 to 6359.5).
Congress.govH.R.5437 - Protection of Lawful Commerce in Stone Slab Products Act (119th Congress)17 September 202512 September 2026congress.gov returns 403 to automated fetches; bill status read via the Quiver Quantitative mirror and hearing documents on docs.house.gov.
Federal Register / OSHAOccupational Exposure to Respirable Crystalline Silica; Final Rule, 81 FR 1628625 March 201612 September 2026Verified via the Federal Register API: published 2016-03-25, effective 2016-06-23, Docket OSHA-2010-0034.
National Library of MedicinePubMed202612 September 2026Every study record was checked against its PubMed entry (PMID, DOI, journal, date) via the NCBI E-utilities API on the last_verified date.
NIOSH / OSHAOSHA/NIOSH Hazard Alert: Worker Exposure to Silica during Countertop Manufacturing, Finishing, and Installation (2026 update)26 February 202612 September 2026DHHS (NIOSH) Publication No. 2026-101; OSHA HA-3768-2026. Updates the 2015 alert (2015-106).
NIOSH / OSHAOSHA/NIOSH Hazard Alert: Worker Exposure to Silica during Countertop Manufacturing, Finishing and Installation (2015)201512 September 2026DHHS (NIOSH) Publication No. 2015-106. Original page now returns 404; superseded by 2026-101.
Occupational Safety and Health Standards BoardCal/OSHA evaluation of Petition 609 (memorandum dated April 10, 2026)10 April 202612 September 2026Not reachable from this project's network; existence confirmed via search index.
Office of Senator Caroline MenjivarGovernor Newsom signs SB 20, the Silicosis Training, Outreach, and Prevention (STOP) Act14 October 202512 September 2026
Safe Work AustraliaEngineered stone ban1 July 202412 September 2026WHS ministers agreed the ban on 13 Dec 2023; in force 1 July 2024; engineered stone defined as containing at least 1% crystalline silica.
U.S. House of Representatives (docs.house.gov)Witness statement of David Michaels, House Judiciary subcommittee hearing, January 14, 202614 January 202612 September 2026

Tier 2: high-quality secondary. Major news organisations, professional bodies, universities.

PublisherTitleDateAccessedNotes
AIHACalifornia Standards Board Adopts Permanent Silica Standard9 January 202512 September 2026
AIHACal/OSHA Issues Emergency Temporary Standard on Respirable Crystalline Silica4 January 202412 September 2026Industrial hygiene professional association.
CBS NewsSilicosis, lung disease once linked to mining, hits workers in countertops industry12 March 202612 September 2026Syndication of the KFF Health News report.
CIDRAP (University of Minnesota) / NEJM EvidencePublic Health Alerts: Silicosis among workers fabricating engineered stone ('quartz') countertops in California, 2019-2026September 202612 September 2026
Daily JournalStone countertop makers get jury win in case claiming liability for silicosisJune 202512 September 2026Legal newspaper; paywalled. Not read in full by this project; cited via search excerpt naming the Torrance courthouse and Judge Eric C. Taylor.
Daily JournalLA County court seeks to coordinate 80 silicosis lawsuits202512 September 2026Paywalled; not read in full. Reports a coordination petition by Presiding Judge Sergio C. Tapia II covering nearly 80 cases in Los Angeles, Orange and San Francisco counties.
HealioEngineered stone silicosis 'growing epidemic' in California workers11 September 202612 September 2026Medical news service. Reports the CDPH count as of 13 Aug 2026 (631 cases, 74 transplants, 35 deaths) and the NEJM Evidence figures.
KFF Health NewsAs Lung Disease Threatens Workers, Lawmakers Seek Protections for Countertop Manufacturers12 March 202612 September 2026Also carried by CBS News. Source for the '370+ lawsuits' figure (attributed to plaintiff attorneys), company statements and CDPH counts as of early March 2026.
Public Health WatchCalifornia Moves Closer to Banning Fabrication of Popular Countertops21 May 202612 September 2026Reports the 21 May 2026 Standards Board vote, board members present, and county-level case counts.
Public Health WatchJury Awards $52.4M in Case Against Artificial-Stone Countertop Makers8 August 202412 September 2026Non-profit investigative newsroom; reports the verdict, defendant count and plaintiff biography.
WorkCompWire (reprinting DIR release 2026-45)CA Standards Board Advances Efforts to Protect Workers from Silicosis27 May 202612 September 2026Reprint of the Department of Industrial Relations news release. dir.ca.gov itself refuses connections from outside the US.

Tier 3: interested parties. Law firms, trade press, legal-marketing sites, advocacy groups. Cited only with attribution.

PublisherTitleDateAccessedNotes
AboutLawsuits.comSilicosis Lawsuit - Engineered Stone Silica Dust Exposure LawsuitsSeptember 202612 September 2026Legal-marketing site. Used only as a discovery list of companies named in complaints; nothing here is treated as verified.
Alan Gray LLCArtificial Stone Silicosis: Assessing the Mass Tort PotentialJuly 202612 September 2026Insurance claims consultancy. States no federal MDL identified as of July 2026; cites NIOSH 2018 establishment counts.
Brayton Purcell LLPJury Assesses $7.1 Million to Family of Artificial Stone Fabrication Worker Who Died from Silicosis28 August 202612 September 2026Plaintiff counsel (interested party). Names defense counsel and gives fault allocation.
Brayton Purcell LLPCalifornia Jury Returns $47+ Million Verdict in Artificial Stone Silicosis CaseAugust 202612 September 2026Plaintiff counsel (interested party).
Brayton Purcell LLPCourt Successes: Artificial Stone Silicosis202612 September 2026Plaintiff counsel results page. Source for two confidential settlements with no party names.
Brayton Purcell LLP via PR NewswireBrayton Purcell LLP announces $17,450,000 Verdict In The First Colorado Artificial Stone Countertop Fabrication Silicosis Case4 May 202612 September 2026Plaintiff counsel (interested party). Gives case number and damages components.
Brayton Purcell LLP via PR NewswireHistoric Verdict in Los Angeles, California: Jury Returns a $52,437,366 to Silicosis Victim in Landmark Artificial Stone Case7 August 202412 September 2026Plaintiff counsel press release (interested party).
King & Spalding LLPKing & Spalding Secures Complete Defense Victory for Caesarstone in Hard-Fought Product Liability Trial6 June 202512 September 2026Defense counsel press release (interested party). Gives verdict date, claims tried and nonsuit rulings.
Littler MendelsonCal/OSHA Approves Final Respirable Crystalline Silica Regulation, While Other Potential Limits on Engineered Stone Remain Under Consideration15 January 202512 September 2026Management-side employment firm. Reports the 19 Dec 2024 adoption and SB 20 introduction.
Stone UpdateCalif. Jury Awards $47 Million in Silicosis Case6 August 202612 September 2026Industry trade press. Gives case name, fault allocation and damages components.
Stone UpdateColorado Jury Awards Silicosis Victim $16.8 Million4 May 202612 September 2026Industry trade press. Gives court, judge, fault allocation and Cambria's stated intention to appeal. Headline figure excludes the $600,000 consortium award.
Stone UpdateL.A. Jury Finds $52.4 Million in Damages in Silicosis Case13 August 202412 September 2026Stone-industry trade publication. Reports fault allocation and damages breakdown; company statements.
Womble Bond DickinsonColorado Jury Finds Cambria Not Negligent, Products Not Defective in Silicosis CaseMay 202612 September 2026Defense counsel (interested party). Not readable from this network (403); title only.

Tier 4: discovery only. Aggregators and unsourced material; never the sole basis for a fact.

PublisherTitleDateAccessedNotes
Quiver QuantitativeH.R. 5437: Protection of Lawful Commerce in Stone Slab Products Act, bill summary and actions202612 September 2026Aggregator mirroring congress.gov actions. Used only to read the action list; discovery-tier.

Access limits

This project is operated from outside the United States. Several official California sites (dir.ca.gov, lawhelpca.org) refuse connections from non-US networks, and congress.gov, osha.gov and some newsrooms block automated readers. Where a Tier-1 source could not be read directly the registry says so and the record that depends on it is labelled accordingly. Readers in the United States can check those sources in seconds; if you find a discrepancy, write to the editor.