Industries List
| Name | Province | City | |
|---|---|---|---|
| Howe Sound Pulp and Paper Mill - Howe Sound Pulp & Paper Corporation | British Columbia | Port Mellon | |
| Howmet Castings - Usine de Laval - Howmet Canada Company | Quebec | Laval | |
| Howmet Georgetown Casting - Howmet Canada Company | Ontario | Georgetown | |
| HP Polymers - HP Polymers | Ontario | Puslinch | |
| HTI Hydraulic Technologies Inc - HTI Hydraulic Technologies Inc | British Columbia | Surrey | |
| Huckleberry Mines Ltd. - Huckleberry Mines Ltd. | British Columbia | Houston | |
| Hudson Bay OSB - Weyerhaeuser Company Limited | Saskatchewan | Hudson Bay | |
| HUDSON PLATING - DELTA - Hudson Plating and Coating Co Ltd. | British Columbia | Delta | |
| Hughenden FST - Secure Energy Services Inc. | Alberta | Hughenden | |
| Humber Treatment Plant - City of Toronto | Ontario | Toronto |
