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NEW Visit OSHA's Final Rule on Respirable Crystalline Silica page for information on the new final rule.

OSHA Standards and Enforcement

The following sections highlight OSHA standards, directives, standard interpretations, and national consensus standards that pertain to occupational exposures to crystalline silica.

OSHA Standards

General Industry (29 CFR 1910)

Maritime (29 CFR 1915)

Construction Industry (29 CFR 1926)

  • 1926.55, Gases, vapors, fumes, dusts, and mists
    • Appendix A, Gases, vapors, fumes, dusts, and mists
  • 1926.57, Ventilation

State Standards

There are twenty-eight OSHA-approved State Plans, operating state-wide occupational safety and health programs. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or more stringent requirements.

OSHA Directives
  • National Emphasis Program – Crystalline Silica. OSHA Directive CPL 03-00-007, (2008, January 24). Includes an updated list of industries commonly known to have overexposures to silica; detailed information on potential hazards linked to silica and about current research regarding silica exposure hazards; guidance on calculating the Permissible Exposure Limits (PELs) for dust containing respirable crystalline silica in the construction and maritime industries; and guidance on conducting silica-related inspections.
  • Search all available directives.
Standard Interpretations

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