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June 23, 2023

Bill to Modernize CEPA Receives Royal Assent

Bergeson & Campbell, P.C.

Bill S-5, Strengthening Environmental Protection for a Healthier Canada Act (the Act), received Royal Assent on June 13, 2023. According to Environment and Climate Change Canada’s (ECCC) Backgrounder, the Act modernizes the Canadian Environmental Protection Act, 1999 (CEPA) and represents the first set of comprehensive amendments to CEPA since it was enacted over 20 years ago. It also makes related amendments to the Food and Drugs Act. The Act was initially introduced in the 43rd Parliament in April 2021 as Bill C-28, but it was not considered due to the federal election in September 2021. Under the Act, ECCC will develop a new plan of chemical management priorities and will propose a new regime to manage toxic substances of highest risk. Canada will create a publicly available “Watch List” of substances determined to be capable of becoming toxic under CEPA to inform Canadians and businesses of substances that they may wish to avoid. This memorandum provides a summary of the amendments and new measures in the Act.

A Right to a Healthy Environment

The Act requires that decisions made under CEPA respect the right to a healthy environment. According to the Backgrounder, over the next two years, the government will develop an implementation framework to set out how that right will be considered in administering the Act. The Backgrounder states that the framework will explain how the right will account for principles such as environmental justice, intergenerational equity, and non-regression. It will also describe any other relevant factors to consider in interpreting and applying the right and determining its reasonable limits.

The government will develop the framework in consultation with interested Canadians. The Ministers of Environment and Climate Change and of Health will report annually on the implementation framework. The framework will also enable continuous improvement in light of experience and as views evolve. The amendments also require that research, studies, or monitoring activities be conducted to support the government in protecting the right. The Backgrounder states that the amendments also confirm the government’s commitment to implement the United Nations Declaration on the Rights of Indigenous Peoples and incent action on reconciliation through a requirement to report annually on consultations, findings, recommendations, or measures taken in that regard.

Protecting Vulnerable Populations

The Backgrounder states that implementation of the right to a healthy environment under CEPA will include work to identify populations that may be disproportionately impacted due to greater susceptibility or higher exposure to environmental and health risks, leading to more informed and protective environmental and health standards. The amendments also expressly require the government to administer the Act in ways that minimize risks to the health of vulnerable populations.

The Act defines a vulnerable population as “a group of individuals within the Canadian population who, due to greater susceptibility or greater exposure, may be at an increased risk of experiencing adverse health effects from exposure to substances.” The Backgrounder notes that these populations may include pregnant people, children, people in poor health, workers, and those living in areas where levels of pollution are particularly high.

To protect better people who are more susceptible or highly exposed to harmful substances, amendments to CEPA provide that the government has a duty to protect the environment and the health of all Canadians, including vulnerable populations. According to the Backgrounder, the changes also require the Ministers of Environment and Climate Change and of Health to consider available information regarding vulnerable populations and vulnerable environments in risk assessments. To maximize the availability of that information, the government must conduct research and studies, including biomonitoring surveys, specifically in relation to the role of substances in illnesses or in health problems, that may relate to vulnerable populations. The amendments also enable geographically targeted regulations to support better the protection of communities at risk from local sources of pollution.

Assessing Real-Life Exposures

The Backgrounder states that in Canada and elsewhere, “the general approach has been to assess substances for risks in isolation.” Canadians and the environment are exposed to multiple substances from many different sources often at the same time and over a lifetime, however. According to the Backgrounder, recognizing that the science of assessing cumulative effects is still evolving, the Act requires that the Ministers of Environment and Climate Change and of Health consider available information about the cumulative effects on the environment and health that may result from exposure to a substance in combination with exposure to other substances when conducting and interpreting the results of risk assessments.

A New Plan of Chemicals Management Priorities

The government will develop a new Plan of Chemicals Management Priorities to assess, understand better, and protect Canadians and the environment from chemicals of concern. The Backgrounder states that in 1999, CEPA required prioritization of the 23,000 substances already in commerce in Canada based on specific criteria related to their bioaccumulation, persistence, inherent toxicity, and the greatest potential for exposure. Canada identified approximately 4,300 chemicals as priorities that met one or more of these criteria. The process to assess these substances “has largely been completed.”

With new chemicals being developed, new uses for existing chemicals, increasingly complex supply chains, and emerging science about risks including cumulative effects, the Act requires the government to establish a new plan to prioritize the ongoing assessment of risks from chemicals. According to the Backgrounder, this plan “will include timelines, a strategy to reduce reliance on vertebrate animal testing, consider class-based assessment approaches as a means of avoiding regrettable substitutions, as well as labelling and other means to provide meaningful information to the public.” The Act requires that this plan be reviewed at least every eight years.

Supporting the Shift to Safer Chemicals

The Backgrounder states that to support the shift to safer chemicals, the government “recognizes that it is important to encourage the use of product designs, processes, and chemicals that are safe for the environment and human health.” In addition to changes to risk assessment and risk management activities, the Act requires the Minister of Environment and Climate Change to maintain a “Watch List” — a list of substances that can pose a risk and thereby meet the criteria in CEPA Section 64 if, for example, uses change or exposure increases. According to the Backgrounder, the Watch List will help importers, manufacturers, and Canadian consumers to select safer alternatives and “avoid regrettable substitutions — replacing one problem chemical with another that, in turn, becomes a problem.”

Increased Transparency in Decision-Making

The Act allows Canadians to request that a chemical be assessed and requires the Ministers of Environment and Climate Change and of Health to consider and respond to any such requests. The Act also requires that the government communicate anticipated timelines for completing risk assessments and for proposing subsequent risk management actions when a substance is found to meet the criteria to require risk management.

According to the Backgrounder, industry will be required to provide a rationale to support requests for the confidentiality of business information, and the Ministers will be required to review and validate a statistically representative sample of these requests and report on the results. In addition, the Act establishes the circumstances under which the Ministers may disclose the explicit names of masked substances or living organisms.

A Stronger Regime for Toxic Substances that Pose the Highest Risk

The Act creates a stronger regime for controlling the subset of toxic substances that pose the highest risk to human health or the environment. For substances that are determined to be toxic under CEPA and that meet the new additional criteria of posing the highest risk, the Act requires that the Minister of Environment and Climate Change and the Minister of Health give priority to prohibiting activities involving these substances. The Backgrounder states that the criteria for these substances will be set out in regulations and will include persistence, bioaccumulation, carcinogenicity, mutagenicity, and reproductive toxicity. Canada will develop these regulations in consultation with stakeholders.

According to the Backgrounder, “[g]iving priority to prohibition can lead to different scenarios: the substances can be phased out entirely; activities or releases of concern can be prohibited; or all new uses can be prohibited, unless it can be demonstrated that there are no safer alternatives, and the use can be undertaken safely.” The Backgrounder states that to reflect this new approach, CEPA Schedule 1 is divided into two parts. Part 1 contains toxic substances that pose the highest risk, for which CEPA will prioritize the prohibition of activities and releases of concern. Part 2 contains all other CEPA-toxic substances. The Backgrounder notes that the Act “maintain[s] the fundamental risk-based approach under CEPA, which ensures that the Government focuses on the risks posed by substances based on their inherent characteristics and their actual or potential releases and exposures.”

Risk Assessments of New Living Organisms under Part 6 of the Act

The Act requires the Ministers of Environment and Climate Change and of Health to consult interested persons when assessing new living organisms that are vertebrate animals or otherwise prescribed by regulation.

Reducing Reliance on Animal Testing

The Act recognizes efforts to reduce reliance on the use of vertebrate animal testing when assessing the risks from substances. The Act requires the government to support the development and use of scientifically justified alternative methods and strategies to replace, reduce, or refine the use of vertebrate animals in toxicity testing.

Changes to the Food and Drugs Act to Strengthen the Environmental Risk Assessment and Risk Management of Drugs

The Act amends the Food and Drugs Act to expand the Minister of Health’s ability to manage environmental risks resulting from drugs, and also provides the Minister the ability to develop modernized environmental risk assessment and risk management regulations for drugs under the Food and Drugs Act.

Moving Forward

According to the Backgrounder, the government will get to work on implementing the modernized CEPA. Implementation work will include engaging Canadians in developing an implementation framework on the right to a healthy environment under CEPA and a Plan of Chemicals Management Priorities. The government will also continue to review other potential changes to CEPA to ensure that it continues to provide an effective legal foundation for protecting the environment and human health.


These amendments are the first significant reform to CEPA in more than 20 years. CEPA uses a risk-based chemical regulatory scheme, similar to the U.S. Toxic Substances Control Act (TSCA), and the Act maintains this approach. The Act is ambitious, giving the Ministers two years to develop and publish a Plan of Chemicals Management Priorities that sets out a multi-year, integrated plan for the assessment of substances. The creation of a “Watch List” of chemicals, however, could effectively serve as a list of chemicals for deselection. Any person will be able to file a written request that a substance be assessed to determine whether it is toxic or capable of becoming toxic. The Act allows for the Watch List to be amended “from time to time.” Under the Act, substances will be deleted from the Watch List if “an order is made under subsection 90(1) adding the substance to the list of toxic substances in Schedule 1” or the Ministers “no longer have reason to suspect that the substance is capable of becoming toxic.”