| Bowdoin College | Brunswick | ME |
| Broadman Hall | Auburn | ME |
| Brunswick Naval Air Station | Brunswick | ME |
| Buerhaus Insulation | Auburn | ME |
| Bureau Of Yards & Docks | Cutler | ME |
| Burnham & Morrill | Portland | ME |
| Carleton Woolen | Winthrop | ME |
| Carman Thompson | Lewiston | ME |
| Central Maine General Hospital | Lewiston | ME |
| Central Maine Medical Center | Lewiston | ME |
| Central Maine Power | Augusta | ME |
| Central Maine Power | Lewiston | ME |
| Central Maine Power | Gardiner | ME |
| Central Maine Power | Yarmouth | ME |
| Central Maine Power | Farmingdale | ME |
| Central Maine Power | Cousins Island | ME |
| Central Maine Power | Wiscasset | ME |
| Champion International | Bucksport | ME |
| Champion Paper & Fiber | Bucksport | ME |
| Charles Dauray | South Portland | ME |
| Chemtron | Searsport | ME |
| Chevron | South Portland | ME |
| Chinet | Waterville | ME |
| City National Bank | Belfast | ME |
| Cumberland County Power & Light | South Portland | ME |
| Cutler VLF Transmitter | Cutler | ME |
| Cutter Fire Brick | Portland | ME |
| Cyro Industries | Sanford | ME |
| Daniels International | Rumford | ME |
| Decoster Egg Farm | Turner | ME |
| Diamond National | Great Works | ME |
| Dow Air Force Base | Bangor | ME |
| Downeast Urethane | Auburn | ME |
| Dragon Cement | Rockland | ME |
| Dragon Cement | Thomaston | ME |
| Dr. Campbell | Sangerville | ME |
| Dumbarton Woolen Mills | Sangerville | ME |
| Eastern | Lincoln | ME |
| Eastern Fine Paper & Pulp | Brewer | ME |
| Eastern Fine Paper & Pulp | Bangor | ME |
| Eastern Fine Paper & Pulp | Lincoln | ME |
| Eastern Manufacturing | Lincoln | ME |
| Eastern Refractories | Lewiston | ME |
| Eastland Woolen Mill | Corinna | ME |
| East Yard | Portland | ME |
| Econby Company Madison Mills | Madison | ME |
| E. Fine Paper & Pulp | Lincoln | ME |
| Elijah Kellogg | South Portland | ME |
| Ethyl | Rumford | ME |
| Fairchild Semiconductor | South Portland | ME |
