Workplace Safety — Ontario Employment Law
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About Workplace Safety
When a safety hazard goes unaddressed or safety protocols are breached in an Ontario workplace, the consequences often escalate far beyond a simple warning. Workplace safety disputes frequently intersect with complex employment law issues, particularly surrounding terminations for cause, civil liability, and compensation for injuries.
In Ontario, the foundation of workplace safety is the Occupational Health and Safety Act (OHSA), which legally requires employers to properly train staff and maintain a hazard-free environment. However, when things go wrong, the resulting legal battles usually focus on how these safety requirements impact an employee's job security and their right to seek damages.
A frequent dispute arises when an employer terminates an employee "for cause" following a safety violation, such as failing to wear protective equipment or operating machinery like a forklift improperly. Employers often argue that any safety breach is severe misconduct warranting immediate dismal without severance pay. Ontario courts, however, do not view all safety infractions equally. Judges apply a contextual approach, evaluating whether the specific mistake genuinely destroyed the fundamental employment relationship. Factors such as the worker's disciplinary history, the clarity of the employer's safety training, and whether the violation was intentional play heavily into determining if a termination was actually a wrongful dismissal. A minor oversight by a long-term employee rarely meets the high threshold required for a just-cause termination.
Another critical legal intersection occurs when a worker is injured due to a workplace hazard. Many employees mistakenly believe that if an employer's negligence caused an accident—like leaving an empty pallet in a dark aisle—they can sue the company in civil court. In reality, the Workplace Safety and Insurance Act (WSIA) removes this right for most workers. The WSIA mandates that workplace injury claims be handled exclusively through the Workplace Safety and Insurance Board (WSIB). Attempting to bypass this system to file a civil lawsuit against an employer will typically result in a judge dismissing the action and potentially ordering the injured worker to pay the employer's legal costs.
Sorting out whether a safety violation actually justifies a firing, or determining the correct legal venue for an unsafe workplace claim, is rarely straightforward. Because the interplay between safety regulations, severance rights, and injury compensation relies entirely on the exact details of a specific incident, engaging a legal professional to analyze the unique facts is a vital step in protecting your rights.
Frequently Asked Questions
Can I be fired without severance for a single workplace safety violation?
It depends on the severity of the violation and the surrounding circumstances. Ontario courts look at the context, including your disciplinary record, the specific training provided, and whether the act was reckless or an honest mistake. While severe or intentional safety breaches can justify a dismissal for cause, minor or isolated errors rarely meet that standard.
Can I sue my employer in civil court if I am injured by a safety hazard?
Generally, no. For most Ontario employees, the Workplace Safety and Insurance Act (WSIA) strictly bars civil lawsuits against an employer for workplace injuries. Instead, compensation and medical benefits must be pursued through the WSIB system, regardless of whether the employer was negligent.
Are managers held to a stricter safety standard than regular employees?
Yes. The Occupational Health and Safety Act requires supervisors to actively ensure their team complies with safety protocols. If a manager turns a blind eye to unsafe behavior, courts are more likely to support disciplinary action or termination, as preserving safety is a core duty of their position.
What happens if I try to sue my employer for an injury but the WSIB bars the claim?
If you file a civil lawsuit for a workplace injury that falls under the WSIB's exclusive jurisdiction, an Ontario judge will likely strike down the lawsuit. You may also be ordered to pay a portion of your employer's legal costs for bringing an improper claim.
When should I consult an employment lawyer about a safety-related termination?
You should seek legal counsel immediately after you are terminated, especially if your employer claims they have "just cause" stemming from a safety infraction. A lawyer can assess whether your employer's response was legally proportionate before you sign any documents or miss the usual two-year limitation period to file a wrongful dismissal claim.
Common Scenarios
- A warehouse manager is terminated "for cause" and denied severance after allegedly failing to intervene when an employee performed an unsafe forklift maneuver, sparking a wrongful dismissal dispute over whether the punishment was too harsh.
- A retail worker who trips over an empty skid left in an aisle tries to sue the employer for negligence in civil court, only to face a legal motion to have the lawsuit thrown out because the WSIA completely bars the action.
- An employee makes an honest mistake with a piece of equipment that violates a safety protocol but causes no harm; the employer uses the incident as an excuse to fire the employee without notice, despite a decade of unblemished service.
What You Should Know
- Keep personal records of all safety training and manuals your employer provides, as courts will scrutinize these if you are ever accused of knowingly breaching a standard.
- Never assume your employer automatically has "cause" to fire you over a safety incident; immediately have an employment lawyer review the disciplinary action to see if it qualifies as a wrongful dismissal.
- If you are injured due to an unsafe work environment, do not attempt to bypass the WSIB by filing a standard civil lawsuit, as this can result in significant legal cost penalties against you.
- If you are a manager or supervisor, actively document your efforts to enforce safety rules, as failing to correct unsafe employee behaviour can be used as grounds for your own termination.
Featured Cases
Ontario (Ministry of Labour, Immigration, Training and Skills Development) v. Corporation of the Town of Bancroft
2025 ONCJ 745 (CanLII) · 2025-09-08OHSA Prosecution: Charge Dismissed for Inaccessible Area
This is a merits decision in a prosecution under the Occupational Health and Safety Act concerning whether an area along rails and under a compactor constituted a 'floor or other surface used by a worker.' The court dismissed the charge, finding that the space was inaccessible and did not present a slip and fall hazard, meaning the actus reus was not proven. The court also found that due diligence was established in the alternative.
Ontario (Ministry of Labour, Immigration, Training and Skills Development) v. Apogee Ceramics Inc.
2025 ONCJ 418 (CanLII) · 2025-08-06Workplace Safety Sentencing: Fine Increased to $55,000
This is a sentencing decision in a prosecution under the Occupational Health and Safety Act involving a corporate defendant for workplace safety violations. The court rejected a joint submission for a $35,000 fine, applying the public interest test from Anthony-Cook to determine that the proposed amount failed to account for inflation and deterrence. The court increased the fine to $55,000 to ensure it reflected current market realities and served as an effective deterrent.
Ontario (Ministry of Labour, Immigration, Training and Skills Development) v. The Econo-Rack Group Inc.
2025 ONCJ 213 (CanLII) · 2025-04-17OHS Prosecution: Motion for Particulars Dismissed
This is a procedural ruling in a prosecution under the Occupational Health and Safety Act where the court addressed motions for particulars and the sufficiency of charges. The court dismissed the motion for particulars as unnecessary for trial fairness and held that the charge regarding the safe transportation of materials was factually sufficient.
F. v. NB Thrilling Films 4 Inc. et. al.
2025 ONSC 1308 (CanLII) · 2025-02-27Costs Ruling: WSIA Barred Workplace Claim
This is a costs ruling in a matter where the plaintiff's underlying action was dismissed because the Workplace Safety and Insurance Act (WSIA) barred the right to sue. The court determined that costs should be awarded on the partial indemnity scale rather than the substantial indemnity scale sought by the defendants, considering the defendants' delay in bringing the WSIA application and the shared responsibility to clarify the statute-barred status of the claim.
C. v. Peel District School Board
2024 ONSC 4354 (CanLII) · 2024-08-12OLRB Reprisal Judicial Review: OHSA s. 50
This is a judicial review of an OLRB decision concerning an alleged unlawful reprisal under section 50 of the Occupational Health and Safety Act. The Divisional Court applied the reasonableness standard, confirmed by Canada v. Vavilov, to uphold the Board's finding that the denial of 0.1 FTE was based on the employee's inability to perform essential duties rather than safety-related reprisal. The Court also found that the applicant received procedural fairness during the hearing.
Ontario (Ministry of Labour, Immigration, Training and Skills Development) v. Limen Group Const. (2019) Ltd.
2023 ONCJ 535 (CanLII) · 2023-11-29OHSA Prosecution: Due Diligence and Employer Liability
This is a merits decision in a statutory prosecution under the Occupational Health and Safety Act involving a corporate defendant and individual supervisors. The court addressed whether the defendants were employers or supervisors, whether they proved due diligence regarding hazardous rigging practices using embedded rebar, and the scope of their duties under the Act. The court found the essential elements of the counts proved and rejected the due diligence defence.
R. v. Bondfield Construction Company Limited
2022 ONCA 302 (CanLII) · 2022-04-14Court of Appeal Reinstates OHSA Electrical Charges
This is an appeal to the Court of Appeal from an appeal judge's decision regarding employer convictions under the Occupational Health and Safety Act. The Crown appealed the acquittals of three construction and electrical companies after a field service technician was severely burned by an electrical arc flash. The trial justice initially convicted the employers, but the appeal judge overturned the convictions after finding the energized electrical parts were not exposed. The Court of Appeal allowed the appeal in part, finding that the appeal judge erred by ignoring the context and purpose of the safety regulations when interpreting the requirement to disconnect power to equipment. The court set aside the acquittals for the power disconnection offences, upheld the acquittals regarding unauthorized room access, and remitted the remaining due diligence and sentencing issues to the lower court.
Y. v. Bad Boy Furniture Warehouse Limited et al.
2021 ONSC 4630 (CanLII) · 2021-06-14A constructive dismissal case involving a dispute over whether the employer's actions constituted a fundamental breach of the employment contract. The case also involves issues related to the Workers Safety and Insurance Act, potentially concerning workplace safety or insurance benefits.
Ontario (Ministry of Labour) v. Ya Ya Foods Corp.
2021 ONCJ 712 (CanLII) · 2021-05-20OHSA Constructor Liability: Control Test Analysis
This is a prosecution under the Occupational Health and Safety Act concerning the definition of a 'constructor' and the scope of a 'project'. The court analyzed whether the defendant exercised sufficient control over the Line 11 project to be liable as a constructor, distinguishing between owner oversight and constructor duties, and determined that the dismantling activity was industrial rather than construction. The charges were dismissed due to failure to meet the standard of proof beyond a reasonable doubt.
Ontario (Ministry of Labour) v. GMJ Electric Inc.
2021 ONCJ 102 (CanLII) · 2021-02-22OHSA Appeal: Employer & Supervisor Convictions Upheld
This is an appeal from convictions under the Occupational Health and Safety Act regarding workplace safety violations. The Ontario Court of Justice dismissed the appeals, upholding convictions against GMJ Electric Inc. and a supervisor for failing to provide a safe work environment, specifically regarding fall hazards and lack of training, and confirming the supervisor's status under the Act.
Air Canada v. Canadian Union of Public Employees, Air Canada Component
2020 ONSC 5927 (CanLII) · 2020-10-02Judicial Review: Arbitrator Substitutes Suspension for Dismissal
This is a judicial review of an arbitrator's decision substituting a 30-day suspension for the dismissal of a flight attendant. The Divisional Court reviewed whether the arbitrator's decision was reasonable under the Vavilov standard, considering issues of credibility, dishonesty, and workplace safety.
Ottawa Carleton Standard v. F.
2019 ONSC 3899 (CanLII) · 2019-06-28Workplace Harassment: OHSA Duty in Condominium
This is an interlocutory proceeding involving a condominium corporation, addressing whether a defendant's conduct constituted workplace harassment under the OHSA and breached the Condominium Act. The court considered the statutory duty of condominium corporations to protect workers from harassment and whether an interlocutory injunction should be granted to prohibit the defendant from communicating with personnel.
The Brockville Mental Health Centre v. The Ontario Ministry of Labour
2019 ONSC 3805 (CanLII) · 2019-06-19This is a sentencing appeal regarding provincial offences under the Occupational Health and Safety Act. The case concerns the Ministry of Labour's prosecution of the Brockville Mental Health Centre for workplace safety violations.
R. v. Greater Sudbury (City)
2019 ONSC 3285 (CanLII) · 2019-06-06OHSA Constructor Liability: City of Greater Sudbury
An appellate review of a criminal prosecution under the Occupational Health and Safety Act where the City of Greater Sudbury was charged following a fatal accident at a construction site. The central legal issues were whether the City exercised sufficient control to be deemed a 'constructor' or 'employer' and whether it established a due diligence defence against strict liability offences. The case later reached the Supreme Court of Canada (R. v. Greater Sudbury (City), 2023 SCC 28). The Supreme Court of Canada dismissed the appeal on equal division, meaning the Court of Appeal's decision stands. The City is considered an employer under the Act and the matter of its due diligence defence is remitted to the provincial offences appeal court.
Ontario (Ministry of the Environment and Climate Change) v. Sunrise Propane Energy Group Inc.
2018 ONCA 461 (CanLII) · 2018-05-15Workplace Safety Appeal: Due Diligence Defence
This is a motion for leave to appeal to the Court of Appeal from an appeal judge's decision concerning convictions for environmental and workplace safety offences. Sunrise Propane Energy Group Inc. and its directors sought leave to appeal their convictions following a fatal workplace explosion. The trial judge convicted the applicants and imposed fines totalling $5.3 million, which the appeal judge upheld. The Court of Appeal refused leave to appeal because the applicants raised questions of mixed fact and law rather than pure questions of law essential in the public interest. The fines totalling $5.3 million stand.
Workplace Safety and Insurance Board v. C.
2018 ONCA 441 (CanLII) · 2018-05-10WSIB Appeal: Mens Rea for Injured Worker Offences
This is an appeal to the Court of Appeal for Ontario regarding criminal offences under s. 149(2) of the Workplace Safety and Insurance Act, 1997, where injured workers failed to report material changes in their circumstances. The court addressed the mens rea required for the offence, specifically interpreting the term 'wilfully' and considering whether mistaken belief or wilful blindness negates liability. The appeal was allowed, and acquittals were restored or new trials ordered based on errors in the lower courts' application of the mens rea standard.
Ontario (Labour) v. Quinton Steel (Wellington) Limited
2017 ONCA 1006 (CanLII) · 2017-12-20OHSA General Duty Clause: New Trial Ordered
This is an appeal to the Court of Appeal from a summary conviction appeal judge's decision regarding an employer's acquittal under the Occupational Health and Safety Act. The Crown appealed the acquittal of Quinton Steel after a worker died falling from a temporary welding platform. The courts below dismissed the charge, finding that specific workplace regulations governed fall protection and precluded the use of the Act's general duty clause. The Court of Appeal allowed the appeal and ordered a new trial. The Court held that the lower courts misunderstood the law, ruling that an employer's general duty to take every reasonable precaution is not limited or exhausted by specific safety regulations.
R. v. Sunrise Propane Energy Group Inc.
2017 ONSC 6954 (CanLII) · 2017-11-27Workplace Safety: OHSA Sentencing Appeal
An appeal against sentencing for an employer convicted of strict liability offences under the Occupational Health and Safety Act and Environmental Protection Act following a propane facility explosion that caused death and environmental damage. The court addressed the employer's failure to provide adequate instruction and supervision to employees, the rejection of due diligence and official error defences, and the appropriateness of the fines imposed given the aggravating factors.
R. v. Wal-Mart Canada Corp.
2017 ONSC 6726 (CanLII) · 2017-11-08Workplace Safety: Hazard in Aisle
This is an appeal regarding a strict liability offence under the Occupational Health and Safety Act where an employee tripped on an empty skid in a workplace aisle. The court addressed whether the placement of the skid constituted a 'hazard or obstruction' under section 11 of Regulation 851 and whether the employer exercised due diligence. The trial judge's interpretation of the legislation was upheld on appeal.
D. v Liquor Control Board of Ontario
2016 ONSC 3135 (CanLII) · 2016-05-12WSIB Bar: Dismissal of Workplace Injury Suit
This is an interlocutory proceeding regarding whether a plaintiff can sue their employer in court for work-related injuries previously addressed by the WSIB. The court determined that subsections 26(1) and (2) of the Workplace Safety and Insurance Act, 1997 bar such actions, as remedies lie exclusively with the WSIB. Consequently, the court dismissed the action as frivolous or vexatious under Rule 2.1 to prevent abuse of the civil justice system.