Mississauga

The Mississauga Plant is located right next to Toronto, on the western shore of Lake Ontario in Canada. For decades, its engineers, operators, and skilled professionals have helped shape the infrastructure and communities that support a growing province. Since opening in 1956, the plant has embraced several forward-thinking initiatives, investing in technologies and partnerships that support a cleaner, more resilient future.

One of the most significant project features a partnership with Carbon Upcycling Technologies (CUT) to install a Canadian first-of-its-kind commercial carbon capture and utilization facility using CUT's patented technology to permanently sequester CO₂ from the cement kiln and utilize it to transform locally produced industrial byproducts into high-quality, low-carbon supplementary cementitious materials (SCMs). The facility will have the capacity to produce up to 30,000 tons of SCMs annually, directly contributing to Canada’s climate and clean manufacturing goals.

Additionally, the advancement of the Alternative Low‑Carbon Fuels (ALCFs) Project, which will introduce lower‑carbon fuel sources into the manufacturing process. This initiative will reduce greenhouse gas emissions, enhance sustainability, and strengthen the environmental responsibility of our operations. The plant submitted its application to the Ministry of the Environment, Conservation and Parks (MECP) in October 2025, and the full application package can be accessed below.

For generations, teams at the Mississauga Plant have worked closely with local organizations that strengthen and support the community of Mississauga. Partnerships with Compass Food Bank, Armagh House, the Riverwood Conservancy, Credit Valley Conservation, and many others reflect our belief that industry and community succeed together. Some of our Mississauga team’s most meaningful work comes from engaging with local schools, colleges, and universities, inspiring future innovators and opening pathways for the next generation of talent.

This Plant maintains an active Community Advisory Panel, which provides a forum for open dialogue, transparency, and collaboration with plant neighbours. Meeting minutes from those quarterly sessions can be accessed below.

Together, these initiatives demonstrate an ongoing dedication to operating responsibly, supporting the community, and building the foundations of a strong Ontario – one project, one partnership, and one innovation at a time.

Our Mississauga Plant is proud to be partnering with Enbridge Gas. Integrating natural gas as a kiln fuel source will allow the plant to shift away from using coal as a fuel. This transition to natural gas is anticipated to begin in 2027 and is expected to significantly reduce the facility's annual CO2 emissions once the transition to natural gas is complete.

The Mississauga Plant remains committed to reducing emissions through the Site‑Specific Standard (SSS) Project, which includes plans to invest up to $100 million in a robust Action Plan designed to significantly reduce sulfur dioxide (SO2) and nitrogen oxides (NOx) emissions from the cement‑making process. This work reflects a long‑term commitment to environmental performance and regulatory leadership. The decision on this permit application can be found here.

Ash Grove’s Mississauga Plant, a division of CRH Canada Group Inc., has submitted an Environmental Compliance Approval (ECA) with Limited Operational Flexibility (LOF) for Air & Noise. This application is intended to consolidate all emission sources at the Ash Grove Cement Facility under a single, streamlined approval. It covers key operations including crushing, screening, raw material conveying, baghouses, fuel preparation, clinker and cement manufacturing, material handling, dust collectors, and other support activities. The decision on this permit application can be found here.