| Holcim (Us) Inc. - Whitehall Plant | Whitehall | 175.6k |
| Global Tungsten & Powders Llc | Towanda | 161.6k |
| Uss-Clairton Plant | Clairton | 161.3k |
| Pixelle Specialty Solutions Llc | Spring Grove | 114.1k |
| Brunner Island Steam Electric Station | York Haven | 104.5k |
| Keystone Power Plant | Shelocta | 103.3k |
| Martins Creek Steam Electric Station | Bangor | 90.7k |
| Montour Steam Electric Station | Danville | 85.5k |
| Shell Chemical Appalachia Llc | Monaca | 82.0k |
| Armstrong World Industries | Marietta | 81.1k |
| Heidelberg Materials Us Cement Llc - Evansville | Fleetwood | 72.0k |
| Domtar - Johnsonburg Mill | Johnsonburg | 70.7k |
| Bethlehem Energy Center | Bethlehem | 59.5k |
| Calpine Mid Merit Llc York Energy Center | Delta | 49.8k |
| Zekelman Industries Co Dba Wheatland Tube Co-Council | Wheatland | 38.3k |
| Uss Mon Valley Works - Edgar Thomson Plant | Braddock | 33.4k |
| The Procter & Gamble Paper Products Co | Tunkhannock | 29.5k |
| Modern Industries Inc. | Erie | 26.2k |
| Woodgrain Inc. | Wysox | 20.8k |
| United Refining Co | Warren | 19.3k |
| Hunlock Creek Generating Llc Hunlock Creek Energy Center | Hunlock Creek | 15.9k |
| Seward Power Plant | New Florence | 12.5k |
| Calgon Carbon Corp Neville Island Plant | Pittsburgh | 7.0k |
| Monroe Energy Llc-Trainer Refinery | Trainer | 6.4k |
| Clemens Food Group (Hatfield Facility) | Hatfield | 6.3k |
| International Waxes Inc | Smethport | 6.2k |
| Keystone Protein Co | Fredericksburg | 6.2k |
| Cleveland-Cliffs Monessen Coke Llc | Monessen | 5.8k |
| Keystone Cement Co | Bath | 5.7k |
| Buzzi Unicem Stockertown Plant | Stockertown | 5.4k |
| Colver Green Energy | Colver | 4.7k |
| Wickett & Craig Of America | Curwensville | 3.9k |
| Versum Materials Us Llc | Tamaqua | 3.5k |
| Conemaugh Generating Station | New Florence | 2.9k |
| Rohm & Haas Chemicals Llc | Bristol | 2.8k |
| Ellwood National Forge Co | Irvine | 2.2k |
| Cargill Meat Solutions Corp | Wyalusing | 2.1k |
| Jbs Souderton Inc-Beef Plant | Souderton | 2.0k |
| Synthomer Jefferson Hills Llc | Jefferson Hills | 1.8k |
| Tanner Industries Inc | Philadelphia | 1.6k |
| Aurorium Dwg Llc | Delaware Water Gap | 1.4k |
| Johnson Matthey Inc | Wayne | 1.4k |
| Northampton Generating Plant | Northampton | 1.4k |
| Airgas Specialty Products - Donora Pa | Donora | 1.3k |
| Panther Creek Power Operating Llc | Nesquehoning | 1.2k |
| Evonik Corp | Chester | 1.1k |
| Welch Foods Inc. | North East | 1.0k |
| Airgas Specialty Products-Palmerton Pa | Palmerton | 989 |
| Basf Corp | Monaca | 894 |
| Scrubgrass Generating Plant | Kennerdell | 729 |
| Jbs Souderton Inc - Rendering Div | Souderton | 697 |
| Univar Solutions Usa - Bunola Branch | Bunola | 614 |
| Vitro Flat Glass Llc Carlisle Plant | Carlisle | 349 |
| W R Grace & Co | Tyrone | 86 |
| Interstate Chemical Co Inc | Hermitage | 24 |
| Rex Heat Treat-Bedford Inc | Bedford | 14 |
| Modern Industries Kersey Div | Kersey | 10 |
| Langeloth Metallurgical Co | Langeloth | 8 |
| Rex Heat Treat-Lansdale Inc | Lansdale | 5 |
| Stoelzle Glass | Monaca | 0 |
| Hanover Foods Frozen Repack | Hanover | 0 |
| The Lion Brewery Inc | Wilkes Barre | 0 |
| George S Coyne Chemical Co Inc | Reading | 0 |
| Wire & Cable Specialties Inc | Coatesville | 0 |
| Knouse Foods Coop Inc Chambersburg Plant | Chambersburg | 0 |
| Cheswick Plant Environmental Redevelopment Group Llc | Springdale | 0 |
| Young Galvanizing Inc | Pulaski | 0 |
| Titan International Inc | Pottstown | 0 |
| Air Liquide Advanced Materials Inc | Mount Bethel | 0 |
| Nalco Co | Ellwood City | 0 |
| Knouse Foods Coop Inc Peach Glen Plant | Peach Glen | 0 |
| Knouse Foods Cooperative Inc Biglerville Plant | Biglerville | 0 |
| Knouse Foods Coop Inc Orrtanna Plant | Orrtanna | 0 |
| Hanover Foods Corp | Centre Hall | 0 |
| Amuneal Manufacturing | Philadelphia | 0 |
| East Penn Manufacturing Co Inc | Lyon Station | 0 |
| Knouse Foods Corp Inc Mountain Orchard Cold Storage | Aspers | 0 |
| Bodycote Thermal Processing-York Div | Emigsville | 0 |