Welcome to Environment Journal’s Top 25 Remediation Projects. We’re highlighting some of the biggest and most innovative cleanup projects in Canada. They are ranked, quite simply, in order of investment.

While the various projects have many similarities—involving the remediation of soil, groundwater, and sediment—they are rather unique in their own ways, with various combinations of contamination, diverse challenges undertaken in a range of geographic areas, and for different industrial purposes. The project teams manage major risks and multiple stakeholders to enable communities across the country to be cleaner, greener, and more sustainable for future generations.

There are many amazing projects underway and more in store with new federal focus on big nation-building projects. There has never been so much potential for remediated sites and groundbreaking progress.

People living in Port Dover on the shores of Lake Erie are breathing easier thanks to the benefits of an exemplary cleanup project.

The Nanticoke Generating Station was once the largest coal-fired power plant in the world, with a total capacity of 4,000 megawatts at its peak operations. Throughout the late 1990s, Nanticoke provided a significant amount of Ontario’s baseload power and essential electricity to southern Ontario’s industrial sector, along with a sizable amount of pollution. Replacing coal-fired electricity generation remains the single largest climate change initiative undertaken in North America.

In 2016, Ontario Power Generation and its partners, including the Six Nations of the Grand River Development Corporation and the Mississaugas of the Credit First Nation, were selected by the Independent Electricity System Operator to develop a solar facility on the site. Demolition and cleanup of the site by Delsan-AIM Environmental Services Inc. and construction of the solar facility by PCL Construction was completed on schedule by March 2019.

The area has since received another remarkable upgrade, with the nearby Oneida Energy Storage Project, which commenced commercial operations in May 2025. Notably, it was completed ahead of schedule and under budget and is the largest battery energy storage facility in operation in Canada.

This milestone remediation and redevelopment reflects innovative Canadian thinking and strong collaboration among the project partners, including Northland Power, First Nations Six Nations of the Grand River Development Corporation, NRStor Inc., Aecon Concessions and Mississaugas of the Credit Business Corporation, and Canada Infrastructure Bank.

These types of projects deliver not only environmental and economic benefits but also provide opportunities for Indigenous reconciliation as well as employment and training opportunities for the various communities involved.

There are several other success stories underway, and we are excited to shine the spotlight on them through Top 25 Remediation Projects.

Call for Submissions

To submit your project, please visit our website—EnvironmentJournal.ca—and complete the online submission form. The information required includes:

Title and Location
Estimated Cost/Budget
Objectives
Contaminants
Remediation Approaches

The deadline for submissions is October 20, 2025.

Don’t miss this incredible opportunity to showcase your project on a national stage and to be recognized as a leader in Canada’s remediation industry. Together, let’s showcase our collective commitment to a sustainable future.

To submit your project to join the ranks of Top 25 Remediation Projects, click here.

Randle Reef in Hamilton Harbour on Lake Ontario was once the largest contaminated sediment site on the Canadian side of the Great Lakes.  The final stage of the project is scheduled to be completed in 2025.

Key Contacts:

Editorial – Connie@actualmedia.ca

Sales – Vanessa@actualmedia.ca

Affiliate Publications:

Top 100 Projects by ReNew Canada

Top 50 Projects by Water Canada

Top Remediation Projects + RemTech East

The inaugural edition of Top Remediation Projects will be distributed at RemTech East 2026, which will be presented by the Environmental Services Association of Alberta (ESAA) and the Ontario Environment Industry Association of Ontario (ONEIA) on April 8 – 10, 2026 in Ottawa.

Featured image: Boat Harbour. Credit: Government of Nova Scotia.