Ontario · O. Reg. 278/05

DESIGNATED SUBSTANCE - ASBESTOS ON CONSTRUCTION PROJECTS AND IN BUILDINGS AND REPAIR OPERATIONS

Under the Occupational Health and Safety Act

Current version date April 20, 2026 · official source text · watch this law (RSS)

Employment & Workplace

Change history

Ontario · AmendedDate recorded April 20, 2026

Asbestos rules to accept CSA-certified respirators alongside NIOSH-approved ones starting mid-2026

Amendments scheduled to take effect add the CSA Group (CSA) as an accepted respirator certification body alongside the existing NIOSH standard for asbestos work on construction projects and in buildings. Workers and e…

O. Reg. 278/05Construction & Real EstateEmployment & WorkplaceHealth Care+8 / −0 lines