Joint Health and Safety Committees in Ontario: When Employers Need One

Ontario's Occupational Health and Safety Act puts a general duty on every employer to take reasonable precautions to protect workers — but for many workplaces, that duty comes with a more specific requirement attached: setting up a joint health and safety committee. Business owners are often surprised to learn the obligation applies to them, usually because nobody flagged it when the business was smaller and growing.

This article explains what a joint health and safety committee is, when Ontario law expects a workplace to have one, what a smaller workplace needs instead, and how the committee is actually supposed to function once it exists.

What a Joint Health and Safety Committee Is

A joint health and safety committee (often shortened to JHSC) is a standing group of worker and management representatives whose job is to identify workplace health and safety problems and bring them forward — inspecting the workplace, receiving and investigating concerns, and recommending corrective action to the employer. It is not a substitute for the employer's own legal responsibility for safety; it is a structure the Occupational Health and Safety Act (OHSA) requires so that safety concerns have a formal channel and workers have a genuine voice in raising them.

When Ontario Law Requires One

OHSA requires most workplaces above a certain size to establish a joint health and safety committee, with somewhat different rules for particular sectors, including construction. The exact worker-count threshold — and the point at which a workplace instead only needs a single health and safety representative rather than a full committee — is set out in the Act and its regulations and can be applied differently across sectors. Because getting this wrong in either direction creates real exposure, don't rely on a rule of thumb you heard secondhand — confirm the current threshold that applies to your specific workplace and sector before concluding you're covered or exempt.

Smaller Workplaces: The Health and Safety Representative Alternative

Not every workplace needs a full committee. Ontario's framework also includes a health and safety representative — a single worker-side representative — for workplaces that fall below the committee threshold but still employ enough people that OHSA wants a dedicated safety voice in place. A very small workplace may fall below even that lower bar. Where your business sits on this spectrum depends on your current headcount and how OHSA's regulations define your sector, so this is worth confirming rather than assuming.

Who Sits on the Committee

A joint health and safety committee is meant to be genuinely joint: it includes worker representatives (chosen by the workers or their union, not appointed by management) and employer representatives, and workers must make up at least half the committee. The committee typically has two co-chairs — one from each side — so that neither side can simply dictate outcomes.

What Certified Members Do Differently

OHSA also requires at least some committee members to complete government-approved health and safety certification training, which gives them additional legal powers in specific circumstances. Not every member needs this certification, but a committee without any certified members is not meeting the standard the Act expects.

Committee Responsibilities in Practice

• [ ] Conduct regular workplace inspections and document what's found.
• [ ] Receive and investigate worker complaints or concerns about health and safety.
• [ ] Recommend corrective action to the employer in writing, and follow up on whether it happened.
• [ ] Keep minutes of meetings — these are among the first records a Ministry inspector will ask for.
• [ ] Review the results of any workplace accident or injury investigation.

Getting the Threshold Question Right

Employers frequently get this wrong in one of two ways: assuming a business "too small to worry about it" has crossed the threshold without anyone noticing as it grew, or assuming a committee is optional once informal safety conversations are happening anyway. Neither assumption is safe. If your workforce has grown, changed industry classification, or you've never actually checked, it's worth a deliberate review rather than an assumption.

Frequently asked questions