The Occupational Health and Safety Act draws a hard line through Ontario workplaces at two thresholds: six workers and twenty workers. Below six, the employer has a general duty to keep the workplace safe but does not have to formalize it into a committee or representative. At six, the workers gain the right to select one of their own as a health and safety representative. At twenty, the employer must establish a Joint Health and Safety Committee with worker and management members, co-chairs, certified members, quarterly meetings, and monthly inspections. These are not suggestions. They are statutory obligations backed by fines that can reach $500,000 for an individual and $2,000,000 for a corporation.
OHSA section 8(1) sets the first threshold: at a workplace where no committee is required and the number of workers regularly exceeds five, the employer must cause the workers to select at least one health and safety representative. Section 9(2)(a) sets the second: a JHSC is required at any workplace where twenty or more workers are regularly employed. The word "regularly" is doing heavy lifting here. It does not mean "always" and it does not mean "ever." Ministry of Labour guidance interprets it as the number of workers who are normally present at the workplace on a recurring basis. A seasonal landscaping company that ramps from four workers in winter to twelve in summer crosses the threshold during the season when it has twelve and should have a representative in place for that period. A general contractor running a construction project with a core crew of eight but twenty-five workers on site during the framing phase crosses the JHSC threshold during framing. Count conservatively. If you are anywhere near the line, the cost of having a representative or committee is trivial compared to the cost of an MOL order and the reputational hit of being found non-compliant after an incident.
The question comes up constantly: does a subcontractor's worker count toward your number? The answer depends on who controls the work. On a construction project, the constructor has overall responsibility and the workers of every employer on the project count toward the project's JHSC threshold under O. Reg. 213/91. In a non-construction workplace, workers supplied by a temporary staffing agency count toward the host employer's number if they are working at the site on a regular, recurring basis — they are "regularly employed" at that workplace even if their legal employer is the staffing agency. Independent contractors performing a one-time service generally do not count. Part-time workers who come in every Tuesday and Thursday count. A consultant who visits once a month probably does not. When the Ministry of Labour shows up after an incident and asks to see your JHSC documentation, the inspector is not interested in your creative arithmetic about headcount — they are looking at who was physically present and working on a regular basis.
OHSA section 9(12) requires at least one worker member and one management member of the JHSC to be "certified members" — people who have completed the Part II training program approved by the Chief Prevention Officer. The training has two parts. Part 1, Basic Certification, is a multi-day program covering OHSA legislation, the internal responsibility system, hazard identification and assessment, workplace inspection techniques, and how to make and follow up on recommendations. Part 2 is workplace-specific: it covers the particular hazards of the industry sector the workplace belongs to. For construction, that means fall protection, excavation, scaffolding, and confined spaces. For manufacturing, it means machine guarding, lockout/tagout, and industrial hygiene. The cost typically runs $2,000 to $3,000 per member depending on the training provider and delivery format — in-person is usually at the high end, blended or online at the low end. The employer is required to pay the worker's wages during training time and cannot charge the worker for the course. Training is available through sector safety associations: the Workplace Safety and Prevention Services (WSPS) covers most non-construction sectors, the Infrastructure Health and Safety Association (IHSA) covers construction and transportation, and the Public Services Health and Safety Association (PSHSA) covers healthcare and public services. Approved private training providers are also listed on the Ministry of Labour website. Construction projects with fewer than fifty workers, or expected to last less than three months, are exempt from the certified member requirement under s.9(13) — but even there, training is recommended.
OHSA s.9(26) requires a designated worker member of the JHSC to inspect the physical condition of the workplace at least once a month. For a health and safety representative, the same obligation appears in s.8(6). The inspection is not a clipboard formality — it is a physical walk-through of the entire workplace looking for hazards, deficiencies, and changes since the last inspection. What to look for depends on the workplace, but a good baseline includes: housekeeping (clear aisles, no tripping hazards, spills cleaned up), fire safety (extinguishers charged and accessible, exits unblocked, emergency lighting working), electrical (no damaged cords, no overloaded outlets, panel clearance maintained), machine guarding (guards in place and functional, lockout/tagout procedures posted), personal protective equipment (available, in good condition, being used), chemical storage (WHMIS labels intact, SDS binder current, incompatibles separated), and any outstanding items from the previous inspection. Document findings in writing — date, inspector name, area inspected, hazards found, corrective action recommended, and follow-up status. These records must be available for an MOL inspector and are a critical piece of the due-diligence defence if someone gets hurt. A sloppy or absent inspection log is one of the first things an inspector checks after a serious incident.
OHSA s.9(8) is one of the most misunderstood provisions in the Act. It states that the members of the committee who represent workers shall be selected by the workers they are to represent, or by the trade union if one exists. The employer does not get a vote, a veto, or a shortlist. The employer selects only the management-side members under s.9(9). This design is intentional: the JHSC is built on the internal responsibility system, which assumes that workers closest to the hazards are best positioned to identify them, and that a committee with genuine worker independence will raise issues that a management-appointed committee would bury. In a unionized workplace, the union typically selects the worker members through its own process — the employer has no role in that selection. In a non-union workplace, the workers must be given a genuine opportunity to nominate and select their representatives. An employer who handpicks the worker members, or who pressures workers to select specific people, is violating the Act and undermining the entire purpose of the committee. An MOL inspector who discovers this can order the committee reconstituted and may issue a compliance order with a tight deadline.
The enforcement ladder starts with an inspector's visit. If an MOL inspector finds that a workplace with twenty or more workers has no JHSC, or a workplace with six or more has no health and safety representative, the inspector will issue a compliance order under OHSA s.57 requiring the employer to establish the committee or cause the workers to select a representative within a specified period — often fourteen to thirty days. If the employer ignores the order, the inspector can escalate to a stop-work order under s.57(6) or refer the matter for prosecution. Prosecution under s.66 can result in fines of up to $500,000 for an individual and up to $2,000,000 for a corporation, plus up to twelve months imprisonment for individuals. Directors and officers face personal liability under s.32 — they cannot hide behind the corporate veil if they knew the company was non-compliant and failed to act. Beyond the legal penalties, the practical consequences are severe: if a serious injury or fatality occurs and the employer did not have the required JHSC or representative in place, the employer loses the "due diligence" defence that is usually the first line of defence in an OHSA prosecution. The committee's existence, its meeting minutes, its inspection records, and the employer's written responses to its recommendations are all evidence that the employer was taking reasonable steps to protect workers. Without them, the employer is effectively admitting that worker safety was not a priority. The cost of running a compliant JHSC — a few hours per month of meeting time, a day per month of inspection time, and a one-time training investment of $4,000 to $6,000 — is negligible compared to the cost of a single prosecution, let alone a workplace fatality.