What Are Workplace Hazards? Types, Examples & the Law in Canada

Unsafe work in Canada still exacts a heavy price: according to the Association of Workers' Compensation Boards of Canada (AWCBC), 1,046 workplace fatalities were recorded in Canada in 2024 — 40 of them young workers aged 15 to 24 1. Most incidents trace back to a hazard someone didn't recognize in time. This guide covers what workplace hazards are, the six types with examples, how hazard identification and assessment work, the laws that make hazard awareness an employer duty, and the training behind it.

What are workplace hazards?

A workplace hazard is any source of potential harm in a work environment. Workplace hazards are the conditions, situations, or factors within a work environment that have the potential to cause harm, injury, illness, or damage to employees, visitors, and the surrounding environment 2. Some are immediate and visible, like an unguarded machine or a spill across a walkway. Others build up quietly over months, like noise exposure, repetitive movement, or a workload nobody has questioned. Hazard awareness is the practice of recognizing hazards in the workplace, both the visible ones and the ones that build up slowly, before they cause harm.

What are the main types of workplace hazards?

A common way to classify workplace hazards is into six categories: physical, chemical, biological, ergonomic, psychosocial and safety hazards 2.

What are physical hazards?

Physical hazards come from energy and the environment rather than from a substance: noise, vibration, radiation, temperature extremes, and pressure extremes 2. The harm is often cumulative, so a workplace can sound and feel normal while the exposure adds up. Prolonged exposure to loud machinery causes permanent hearing loss, and work in extreme heat or cold carries its own health risks.

What are chemical hazards?

Chemical hazards come from harmful gases, liquids, dusts, and fumes, from solvents and pesticides to asbestos fibres and flammable or explosive substances. Asbestos is the clearest example: the fibres are released when older building materials are cut, drilled, or demolished, and inhaling them is linked to serious lung disease. Suppliers must classify and label hazardous products they sell into workplaces 10, so knowing how to read a label and a safety data sheet is part of chemical hazard awareness.

What are biological hazards?

Biological hazards are bacteria, viruses, fungi, and other infectious agents 2. They are most common in healthcare and laboratory settings, where staff handle patients, samples, and cultures. They also appear in waste handling, agriculture, and any work involving bodily fluids or contaminated materials.

What are ergonomic hazards?

Ergonomic hazards come from the way work is physically done: repetitive movement, lifting and carrying, and poor workstation setup 2. The injury develops over time rather than in one moment, which is why a task that feels manageable for an hour can cause a musculoskeletal injury over months. Manual handling and desk work both qualify.

What are psychosocial hazards?

Psychosocial hazards come from how work is organized and how people are treated: stress, excessive workload, violence, bullying, and harassment 2. They are harder to point at than a spill or a loose guard, and they are often reported late or not at all. They sit under the same employer duty to provide a safe workplace as any other hazard.

What are safety hazards?

Safety hazards are the everyday injury mechanics of a workplace: slipping and tripping, inadequate machine guarding, and equipment malfunctions and breakdowns 2. They account for a large share of lost-time injuries precisely because they look ordinary. Housekeeping, guarding, and maintenance are where they get controlled.

What is a workplace hazard assessment?

A workplace hazard assessment is the structured process of finding hazards before they cause harm and deciding what to do about them. The cycle is the same across Canada: identify the hazards, assess the risk each one poses, control it, and train workers on the hazards that remain 12.

What is hazard identification?

Hazard identification is the first step of the cycle: finding the hazards of the work, the workplace and the equipment before they cause harm, using inspections, worker consultation, and incident and first-aid records 12.

How is the risk assessed and controlled?

Each hazard is then assessed for the risk it poses: how severe the harm could be, how likely it is, and who is exposed.

Control follows a hierarchy: eliminate the hazard where that is reasonably practicable, then reduce or isolate it by engineering means, then manage the remaining exposure through procedures and protective equipment 3. Elimination coming first is common ground across Canada, but the rest of the order of priority is set by each jurisdiction's own law and is not identical everywhere. Work from the provision that applies to you rather than from a generic hierarchy.

Federal law shows the shape: employers under federal jurisdiction must run a prescribed hazard-prevention program, "develop, implement and monitor … a prescribed program for the prevention of hazards in the work place" 4. The program comes with an identification and assessment methodology and preventive measures taken in a legislated order of priority 8. Several provinces write the same machinery into their own codes, some with a duty to set the assessment down in a report; your jurisdiction's provision is in the table below.

What is the federal legislation for workplace hazards?

For federally regulated workplaces — banks, telecoms, interprovincial transport and the rest of the federal sector — the Canada Labour Code sets the frame. The employer has:

• a general duty to protect health and safety (s. 124) 5;
• a duty to ensure each employee is "made aware of every known or foreseeable health or safety hazard in the area where the employee works" (s. 125(1)(s)) 4;
• a duty to provide "the information, instruction, training and supervision necessary to ensure their health and safety at work" (s. 125(1)(q)) 4;
• the hazard-prevention program duty quoted above (s. 125(1)(z.03)) 4.

Part XIX of the Canada Occupational Health and Safety Regulations (COHSR) turns that program into machinery 6. It sets out a hazard identification and assessment methodology built on investigation reports, first-aid records and workplace inspections (s. 19.3) 7, and the duty to identify and assess hazards by that methodology (s. 19.4). Preventive measures follow in a fixed order of priority (s. 19.5(1)):

• eliminate the hazard, including by engineering controls (a);
• reduce it, including by isolating it (b);
• provide personal protective equipment, clothing, devices or materials (c);
• apply administrative procedures such as managing exposure and recovery periods (d) 8.

Federally regulated employers should note that this sequence puts protective equipment ahead of administrative procedures. That is the reverse of the generic hierarchy of controls, where administrative controls come before protective equipment 3, so the regulation's own order governs.

Two other federal laws touch workplace hazards at their edges. The Hazardous Products Act governs how suppliers classify and label the hazardous products they sell into workplaces (the WHMIS supplier side) 10. The Transportation of Dangerous Goods Act, 1992 governs hazardous goods in transport 11.

Which CSA standards cover workplace hazards?

The core CSA standard for workplace hazards is CSA Z1002:12 (R2022), Occupational health and safety — Hazard identification and elimination and risk assessment and control, which gives the hazard-assessment cycle its method. It is the Canadian standard for how hazards are identified, how risk is assessed, and how control measures are chosen and checked 13. Its management-system companion is CSA Z45001:19 (R2023), Canada's adoption of ISO 45001 — the framework standard for running health and safety as a system 14. CSA has since withdrawn the earlier CSA Z1000 15, so Z45001 is the current management-system reference.

Beyond the framework pair, CSA publishes hazard-specific standards that OHS regulations across Canada build in by reference. Examples are CSA Z460 for hazardous-energy control (lockout) and CSA Z94.4 for respirator selection, use and care, both of which Manitoba's regulation cites 23. Standards become binding when legislation incorporates them; on their own they are voluntary benchmarks.

What are the provincial and territorial rules for workplace hazards?

Occupational health and safety in Canada is mostly provincial and territorial, so the governing instrument depends on where the work happens. The through-line across the rows is that most Canadian jurisdictions write the hazard awareness duty into law expressly, requiring that workers be acquainted with, made aware of, or made familiar with the hazards of their work. Nine put that duty on the employer — the federal jurisdiction, Ontario, British Columbia, Manitoba, New Brunswick, Nova Scotia, Prince Edward Island, Newfoundland and Labrador, and Yukon — and Alberta puts an equivalent duty on supervisors. Those provisions are quoted in the rows below. The remaining jurisdictions reach the same place through information and training duties instead.

Two of those rows are recent. Yukon's Workers' Safety and Compensation Act replaced the former Occupational Health and Safety Act on July 1, 2022 31. In Quebec, the Regulation respecting prevention and participation mechanisms in an establishment came into force on October 1, 2025. It sets the rules for prevention programs, action plans, and health and safety committees and representatives 25.

Who is responsible for hazard awareness in the workplace?

The employer — in every Canadian jurisdiction. Every OHS regime in Canada puts the same two duties on employers: keep the workplace safe, and make sure workers have the information, instruction, training and supervision their work requires. Most jurisdictions go further and write hazard awareness into law almost word for word. Nine require that workers be "acquainted with," "made aware of" or "made familiar with" the hazards of their work. Alberta places the same duty on supervisors, who must advise workers of all known or reasonably foreseeable hazards in their area. Each exact provision is in the table above.

Workers hold the other side of the deal everywhere: follow the training, use the required protections, and report hazards you spot. Reporting is how the system learns. Many workers also take hazard awareness training on their own initiative to strengthen a résumé before safety-sensitive job applications.

Which workers must know the hazards of their work?

Every worker needs to know the hazards of their own work: that is what the employer duties in the table above are for. General workplace hazard awareness training is the foundation, and some industries carry a heavier hazard load than others:

• Construction — falls from height, moving equipment and vehicles, electrical hazards, and silica and other dusts
• Manufacturing — unguarded moving parts, noise, chemical exposure, and hazardous energy during maintenance
• Healthcare — infectious agents, sharps injuries, patient handling, and workplace violence
• Agriculture — machinery entanglement, pesticides, confined spaces such as grain bins, and livestock
• Transportation — vehicle collisions, loading and unloading injuries, and dangerous goods in transit

Ontario workers also have a separate mandatory basic occupational health and safety awareness program 17. Requirements differ by jurisdiction and by workplace, so check with your provincial or territorial regulator, or with your employer's health and safety representative, to confirm what applies to you.

Can the training be done online?

Yes — the awareness content is theory, and it can be completed fully online.

What an online course cannot do is discharge every training duty on its own. General awareness training is the foundation. The duties that attach to a specific workplace, task, piece of equipment or demonstrated competency have to be met at the workplace, and some are prescribed separately. Ontario, for example, prescribes its own basic occupational health and safety awareness training under O. Reg. 297/13 17. Employers choose the training level their workplace needs, so check what yours accepts before relying on any single course.

What should a hazard awareness program cover?

There is no single Canada-wide curriculum for generic hazard awareness training, and the statutory duties differ from one jurisdiction to the next. Read against each other, though, they point at a consistent set of outcomes, and a course worth taking should leave a worker able to do all of the following:

• Recognize the six types of hazards — physical, chemical, biological, ergonomic, psychosocial and safety hazards — and the forms they take in your industry
• Understand how identification and assessment work — inspections, worker consultation, incident and first-aid records, and how risk is judged
• Apply the control hierarchy — eliminate the hazard first, then reduce or isolate it, then manage what remains through procedures and protective equipment, and check the order of priority written into the law that applies
• Know your rights and duties — the right to know about hazards, to participate, and to refuse unsafe work 34; the duty to work as trained and use required protections
• Report hazards and incidents — to a supervisor or safety representative, so the hazard gets controlled instead of repeated
• Know when retraining is triggered — new tasks, new equipment, or a move to work that differs in its hazards
• Know the law and your employer's program — an overview of the OHS act and regulations that apply to you, and the hazard prevention program, procedures, plans and policies your employer must have in place 9,21
• Know the workplace's emergency arrangements — the procedures for a fire or other emergency, where the first aid facilities are, and which areas are prohibited or restricted 21

Does the law set an expiry date for the training?

There is no single Canada-wide statutory expiry period for a generic hazard awareness certificate, and CSA Z1002 is a hazard-assessment standard rather than a training standard, so it fixes no retraining cycle either. The eSafetyFirst Hazard Awareness certificate carries a printed expiry of three years from completion; that is the program’s practice, not a legal requirement.

Requirements that a regulation prescribes specifically — first aid certificates, respirator fit tests, and other prescribed programs — can carry their own renewal rules, so check the ones that apply to your work. Federal law comes closest to a cycle for general training: a federally regulated employer must review its employee training program at least every three years (COHSR s. 19.6(3)) 9. That is a review of the employer's program, not an expiry date on anyone's certificate.

What the law does fix is the triggers — several jurisdictions require retraining when a worker's tasks, equipment or workplace hazards change 9,21. If that happens before the printed date, refresh early.

Key takeaways

Hazards come in six types, and the law expects every workplace to find them, assess them, control them in order — and make sure workers know them. In most Canadian jurisdictions that awareness duty is written into the statute word for word. Hazard awareness training is how workers meet their half of that system.