Aggregated overview of publicly known St Marys Cement sites — capacity, CO₂ intensity, annual emission estimates and links to primary references (company reports, GCCA GNR, IEA, USGS, EU ETS).
Benchmark: world avg 585 kg/t (GCCA GNR 2022) · IEA 2030 target ≈ 500 kg/t
Estimate = plant capacity × intensity. Not audited emissions.
| Country / Type | Citations | |||||
|---|---|---|---|---|---|---|
| #1Bowmanville Plant Bowmanville, Ontario | Canada cement | 1.80 Mt/y cement (1.80 Mt/y clinker) | 790 kg CO₂/t cement | 1.42 Mt | — | |
| #2Charlevoix Plant Charlevoix, MI | United States cement | 1.40 Mt/y cement | — | — | — | |
| #3Detroit Grinding Plant Detroit, MI | United States grinding | 1.13 Mt/y cement | — | — | — | |
| #4Dixon Plant Dixon, IL | United States cement | 1.53 Mt/y cement | — | — | — | |
| #5Milwaukee Grinding Plant Milwaukee, WI | United States grinding | 0.35 Mt/y cement | — | — | — | |
| #6St. Mary's (Ontario) Plant St. Marys, Ontario | Canada cement | 2.10 Mt/y cement (2.20 Mt/y clinker) | — | — | — | |
| #7Port-Daniel Plant Port-Daniel, Quebec | Canada cement | 3.10 Mt/y cement (2.20 Mt/y clinker) | — | — | — |
Data compiled from public sources incl. company reports, sustainability filings, GCCA GNR, USGS, IEA and EU ETS. Unofficial visualization.