Co-operation Agreement between Ontario and Canada

Consultation has concluded

The Impact Assessment Agency of Canada (IAAC) is seeking feedback on a draft co-operation agreement with Ontario.

When a proposed project requires an assessment by both the federal and provincial governments, Canada is committed to working with provinces to achieve “one project, one review”. Under this approach, federal and provincial governments work together to meet shared and respective responsibilities to protect the environment and Indigenous rights with the goal of a single assessment for a project.

Co-operation agreements outline commitments and principles to guide how the federal and provincial governments will work together to eliminate duplication and streamline assessment processes

The Impact Assessment Agency of Canada (IAAC) is seeking feedback on a draft co-operation agreement with Ontario.

When a proposed project requires an assessment by both the federal and provincial governments, Canada is committed to working with provinces to achieve “one project, one review”. Under this approach, federal and provincial governments work together to meet shared and respective responsibilities to protect the environment and Indigenous rights with the goal of a single assessment for a project.

Co-operation agreements outline commitments and principles to guide how the federal and provincial governments will work together to eliminate duplication and streamline assessment processes on a project-by-project basis to enable “one project, one review”.

Have your say

We are seeking feedback on the draft co-operation agreement with Ontario.

The comment period is your chance to review the draft co-operation agreement and submit feedback. The comment period starts November 24, 2025, and ends December 15, 2025, 11:59 p.m. EST.

To provide a comment or upload a submission, please register or sign in.

Comments and submissions will be made public in the official language in which they are received. You can also consult comments and submissions published on the French page.

Comments received will inform the final co-operation agreement.

At a broader level, IAAC sought comments on a consultation paper which outlines Canada’s proposed approach to working with provinces on the assessment of major projects, with the goal of "one project, one review."

Visit the Let’s Talk Impact Assessment webpage to review the consultation paper on the proposed approach to working with provinces and view comments received. While the comment period on the paper is now closed, comments received on the paper will inform the drafting and finalizing of provincial agreements.

Comments submitted by December 15, 2025, 11:59 p.m. EST will be considered for the provincial co-operation agreement.

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The Impact Assessment Agency of Canada

CLOSED: This discussion has concluded.

  • Doug Ford is corrupt

    by Michelle Ross, about 1 month ago
    Doug Ford is beyond corrupt! He is paid off by his donors, he does not act in the best interests of Ontario citizens. He will not return correspondence, our local MPP won’t return correspondence, they are acting like Republicans in the USA. They are Maple MAGA! It’s disgusting. He needs to be removed! Ontario is being run by the mob!

  • Doug Ford cannot be trusted

    by K Last, about 1 month ago
    Doug Ford cannot be left unsupervised. He has time and time again tried to dispense with impact assessments and attempted to sell off public land and services to his rich developer friends. He is as corrupt as the day is long.

  • Doug Fotd

    by Mk, about 1 month ago
    There are serious issues with Ontario PC and how they treat the environment they have stated that the environment is red tape.

    1. Ontario passing bill 5, strips away the protection of endangered animals this will give companies permission to build on these so called economic zones so they can ignore any environmental assessments
    2. Ford wants to change the law to reduce the number of conservation groups
    3. pressured the federal government to withdraw any need to perform a environmental assessment for hwy 417 which runs through the greenbelt.

    I cannot trust Ford with any environmental assessment




  • The Impact Assessment Agency of Canada should look to Manitoba—not Ontario—for leadership in co-operative environmental assessments

    by Sriti , about 1 month ago
    Ontario’s recent actions, including the passage of Bill 5, have exposed deep provincial controversies, weakened environmental protections, and disregarded the spirit of consultation. This instability will only create future federal-level headaches if Ontario is treated as a model partner.

    Manitoba, by contrast, is demonstrating what responsible leadership looks like.
    With an Indigenous Premier and a government actively working to rebuild trust, Manitoba offers a far stronger foundation for genuine partnership, respectful Indigenous engagement, and transparent environmental decision-making. Meanwhile, Ontario is still fighting its own First Nations over the Ring of Fire and pushing forward projects without meaningful consent.

    If Canada... Continue reading