Ontario Regulation 157/25, filed under the Occupational Health and Safety Act, introduces an amendment to Ontario Regulation 213/91 regarding construction projects. Specifically, it mandates the presence and proper maintenance of defibrillators at construction sites where twenty or more workers are regularly employed. This new requirement is encapsulated in section 27.1 and is aimed at enhancing workplace safety and emergency preparedness across Ontario’s construction industry.

Under this regulation, constructors at qualifying construction sites are required to install a defibrillator that is licensed by Health Canada as a medical device. Alongside the defibrillator, certain emergency response items must be stored and maintained. These include a cardiopulmonary resuscitation (CPR) mask, a pair of scissors, two pairs of disposable medical-grade gloves, a disposable razor, a garbage bag, and four absorbent towels. The inclusion of these items ensures that the defibrillator can be used effectively in a medical emergency and that hygiene and safety are maintained during its use.

Storage conditions for the defibrillator and accompanying items are clearly specified. The regulation requires that the defibrillator be housed in a location that keeps it and the required items together, shields them from dust, moisture, and other damaging substances commonly found on construction sites, and remains easily accessible and unobstructed. If the defibrillator is placed outdoors, the storage must protect it from extreme weather conditions, including temperature variations and direct sunlight. Additionally, each storage location must be clearly marked with signage that includes a universally recognized graphic of a heart with a lightning bolt, along with the terms “Automated External Defibrillator” or “AED” in English or their French equivalents, “Défibrillateur externe automatisé” or “DEA”.

To ensure workers are aware of the defibrillator’s location, signs must be placed not only directly adjacent to the device but also throughout the worksite. These signs must convey sufficient information to direct individuals to the defibrillator quickly in the event of an emergency. The regulation emphasizes the importance of visibility and rapid accessibility, especially considering the urgency often associated with cardiac events.

The regulation also outlines maintenance and inspection requirements. A defibrillator must be maintained and tested according to the manufacturer’s instructions and undergo a quarterly inspection conducted by a competent worker. Each inspection must be documented, and records are to be kept with the defibrillator. The inspection record must include the date of the inspection and the name and signature of the person who carried it out, ensuring traceability and accountability.

Moreover, the presence of trained personnel is mandatory while work is ongoing. At least one worker trained in both CPR and defibrillator operation must be present at all times when construction activity is in progress. This requirement helps to ensure that if a medical emergency arises, a qualified individual is available to respond immediately using the equipment provided.

Ontario (157/2025) August 5, 2025
Disclaimer: Insights are for informational purposes only and do not reflect RRI’s official position or constitute legal opinion.