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Which laws in Ontario applies to health and safety at work?

In Ontario, the Occupational Health and Safety Act (OHSA) is the provincial legislation that sets standards for workplace health and safety. The main purpose of the law is to prevent injury and death caused by workplace hazards.


For those who fail to comply with the OHSA and show disregard for compliance and for employers whose actions result in serious injuries or a worker's death, legal proceedings under the Act are often pursued. A person can be fined up to $25,000 for every offence under the Act and/or serve up to 12 months in jail. A corporation can be fined up to $500,000 for every offence.

Health and safety rights and responsibilities for owners, employers, supervisors and workers are stated in the OHSA. The Act is administered by the Ontario Ministry of Labour and its inspectors enforce the Act and the regulations under the OHSA, which contain specific requirements.



Table of Contents
  1. Who is responsible for health and safety?
  2. What is a health and safety committee?
  3. Are there any other health and safety laws in the workplace?
  4. What are regulations under the Occupational Health and Safety Act?
  5. What is the Workplace Hazardous Materials Information System (WHMIS)?
  6. How does WHMIS apply at my job?
  7. Are there other laws that I should know about?

Who is responsible for health and safety? Top

The OHSA is founded on the philosophy of the "internal responsibility system" or, as it is more simply called, "the IRS". The IRS means that health and safety is the responsibility of everyone in the workplace. In addition to meeting legal obligations, a workplace where there is a good IRS will have good communications between workers and employers, and will be one where health and safety issues are addressed and solved as soon as they're raised. Good communication usually leads to fewer injuries, lower costs and an all-round better and more productive workplace.

Workers, supervisors and employers have different duties and responsibilities set out in the OHSA, but those duties and responsibilities overlap and require these parties to talk to each other, cooperate and share information.

What is a health and safety committee? Top

While employers and employees must talk and work together on a daily basis, the health and safety committee is the place where workplace health and safety issues are discussed and suggestions are made to the employer to look at or fix problems. The committee brings together management and workers on a regular basis. Both have an equal say in matters pertaining to the safety of workers.

In workplaces where the IRS works well, there will likely be fewer injuries and better observance of the law.

Are there any other health and safety laws in the workplace? Top

Local public health units will carry out inspections and investigate complaints in workplaces to enforce the Smoke-Free Ontario Act. The act prohibits smoking in enclosed workplaces in Ontario in order to protect workers from exposure to second hand smoke. The act repeals the Smoking in the Workplace Act, which was enforced by the Ministry of Labour.

For more information on the Smoke-Free Ontario Act, how it affects your workplace and who to contact about having it enforced, please visit the Ontario Ministry of Health Promotion website at: www.mhp.gov.on.ca/english/health/smoke_free/legislation.asp.

What are regulations under the Occupational Health and Safety Act? Top

Acts are the starting point for setting out regulations. While the Act sets out general duties (for example, see Part III: Duties of Employers and Other Persons,) the regulations set out more detailed requirements. Regulations are in place for various types of workplaces and workplace hazards and provide more specific requirements to make the work and work area safe. There are currently over 30 regulations in place under the OHSA.

Some of the types of workplaces with specific regulations include:

  • industrial establishments
  • construction projects
  • mines and mining plants
  • health care facilities.

Hazards covered by regulations include:

  • biological and chemical agents
  • X-rays
  • designated substances such as:
  • asbestos, lead, mercury, ethylene oxide.

Occupations covered by specific regulations include:

  • firefighters
  • teaching assistants and university academics
  • window cleaners.

There are regulations that set out standards for specific types of equipment:

  • roll-over protective structures.

Within each regulation many specific requirements are laid out. One of the important ones that affects young workers is the minimum age requirement for work.

What are the minimum age requirements?

What is the Workplace Hazardous Materials Information System (WHMIS)? Top

Workers in Canada are fortunate that there is a cross-Canada system of identifying chemical and biological hazards and provincial regulations to ensure workplaces have proper labelling, information for workers and training programs for all hazardous products workers may be exposed to. In Ontario, WHMIS has been in place since 1988. There is a lot of information available for employers and workers, so you should expect your employer to mention WHMIS to you during your orientation or job-specific training.

Not all products fall under WHMIS. Consumer products, like cleaning chemicals bought in the grocery or hardware store are not covered by WHMIS but have their own set of symbols for consumer protection. As well, pesticides and drugs are examples of WHMIS-exempt products that are covered by their own specific legislation.

How does WHMIS apply at my job? Top
  1. Warning labels
    Containers for hazardous materials must have a warning label that tells you the name of the product, the hazards it poses to you, how to use it safely and first aid procedures.

    The label must include as many of the eight WHMIS symbols as necessary to identify the types of hazards. The distinctive back-hatched border around the label easily identifies WHMIS product labels.

    If the material is transferred from the original container to another one (sometimes a spray bottle or smaller container for convenience), it must also be labeled with similar information. This is called a workplace label.

    Get familiar with WHMIS symbols.

  2. Material Safety Data Sheets (MSDS)
    Suppliers of WHMIS controlled products must also provide written material in the form of a MSDS to alert everyone in the workplace about all hazards associated with a material and how to handle it safely. It contains more details than the WHMIS label.

    The employer must have a current (not more than three years old) copy of the MSDS for every hazardous material in the workplace. The MSDSs must be kept in the workplace in a location where all workers can find them and read them.

    How do I read a MSDS?

    Some MSDSs are quite detailed and contain a lot of scientific data, but don't be intimidated. Each MSDS has to contain some basic information designed to protect your health and safety. When you read a MSDS, look for answers to these questions.

    1. Does the name on the MSDS match the material you're working with? Check both the name of the product and the manufacturer's name. If they don't match, report the deficiency to your supervisor.
    2. Is the MSDS up-to-date? If it's more than three years old, it's expired. If it's expired, ask your supervisor about it.
    3. What are the hazards associated with the material? Can it burn or explode? Is it unstable? Can it react with other chemicals? Which ones? What happens if they get mixed?
    4. How can the material harm you? What happens if you breathe the material or get it on your skin? What kinds of injury or illness can the material cause?
    5. Do you need protective equipment when handling or using the material? What equipment? Is it available in the workplace and have you been trained to use and care for it?
    6. Are there any other special handling precautions?
    7. What are the emergency procedures if something goes wrong like a spill on skin or clothing? What if it is accidentally ingested or splashes in your eyes?
    8. What emergency equipment is required and where is that equipment located? Eye-wash stations are one of the common pieces of emergency equipment recommended in case the product splashes in a worker's eye.
  3. Worker training
    Any worker who works with or near hazardous materials must be trained in how to use and handle them safely. You need to be familiar with the WHMIS symbols, workplace procedures for labelling containers, location of Material Safety Data Sheets and use and care of any personal protective equipment necessary to handle the products safely.

    WHMIS training is a good example of a worker's right to know about hazards they may be exposed to.

    Do you need WHMIS training?

    Ontario students receive basic WHMIS information in secondary school and may also receive some WHMIS training on the job. When are you fully trained so that you can tell a new employer that you've already been trained in WHMIS? NEVER. Even if you know the basics about labels, MSDSs and symbols, WHMIS training is only complete when you are trained by your employer in:

    • the WHMIS products they handle in their workplace, the hazards associated with them and how to handle them safely
    • the protective equipment they have for your use and how to use and care for it
    • where they keep their MSDSs
    • their emergency procedures.

Are there other laws that I should know about? Top

There are other Ontario laws, jurisdictions and standards that also contribute to overall workplace health and safety but are not administered by the Ministry of Labour, and do not fall under the Occupational Health and Safety Act. Some of these are listed below.

  • The Workplace Safety and Insurance Act (WSIA) requires employers to pay insurance premiums to compensate their workers if they get injured but also ensure the workplace is safe so that injuries are prevented. The Workplace Safety and Insurance Board administers the WSIA. www.wsib.on.ca

  • The Ontario Fire Code comes under the responsibility of the Ministry of Community Safety and Correctional Services (Office of the Fire Marshal) and is usually enforced by municipalities. www.ofm.gov.on.ca/en/default.asp

  • The Ontario Building Code is administered by the Ministry of Municipal Affairs and Housing, and is usually enforced by municipal building inspectors. www.obc.mah.gov.on.ca

  • The Electrical Safety Code is under the direction of the Electrical Safety Authority. http://www.esasafe.com

  • The Human Rights Code, administered by the Ontario Human Rights Commission, protects human rights in the workplace. www.ohrc.on.ca/english/index.shtml

  • The Technical Standards and Safety Authority (TSSA) is responsible for fuel safety, including propane handling, elevators and escalators, amusement devices and other public safety legislation. www.tssa.org

  • The Trades Qualification and Apprenticeship Act sets educational standards for apprenticeship and trades. The Act is administered by the Ministry of Training, Colleges and Universities, although a few aspects are enforced by the Ministry of Labour. www.tcu.gov.on.ca/eng/employmentontario/training/

  • The Canadian Standards Association (CSA) sets national voluntary standards that cover a wide variety of issues and equipment. Some examples are: machine guarding, office ergonomics, hard hats, safety boots, electrical appliances, refrigeration equipment, powered lift trucks, fall protection and punch and brake presses. All equipment certified by CSA must meet its tough testing standards to qualify for the CSA approval marking on the equipment. This assures users that safety factors have been built in and tested to ensure the user will be afforded the optimum safety protection. www.csa.ca/Default.asp?language=English



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