OSSGA brings together aggregate producers, equipment and heavy machinery suppliers, equipment manufacturers and dealers, environmental consultants, planning consultants, lawyers, engineers, researchers, landscape architects, general contractors, educators and others associated with the aggregate industry. 

We are the voice of the aggregate industry in Ontario. Collectively, our members supply a significant majority of the approximately 164 million tonnes of aggregate consumed annually in the province.

We provide significant value for our members through advocacy, training, events and more. Joining OSSGA means becoming part of a community of innovators and busines leaders, elevating your organization.