| Woodgrain Inc. | Wysox | 317.2k |
| Saint Nicholas Cogeneration Project | Shenandoah | 37.3k |
| Conemaugh Generating Station | New Florence | 33.0k |
| Keystone Power Plant | Shelocta | 20.8k |
| Cleveland-Cliffs Steel Corp /Butler Works | Butler | 19.9k |
| Uss Mon Valley Works - Edgar Thomson Plant | Braddock | 16.0k |
| Panther Creek Power Operating Llc | Nesquehoning | 13.8k |
| Befesa Zinc Us Inc. | Palmerton | 12.7k |
| Cleveland-Cliffs Plate Llc Coatesville Facility | Coatesville | 8.2k |
| Asc Engineered Solutions - Fka Anvil International | Columbia | 5.7k |
| Du-Co Ceramics Co | Saxonburg | 3.7k |
| Zekelman Industries Co Dba Wheatland Tube Co-Council | Wheatland | 3.4k |
| Johnstown Wire Technologies Inc. | Johnstown | 3.1k |
| Young Galvanizing Inc | Pulaski | 2.9k |
| Standard Steel Llc | Burnham | 2.9k |
| North American Hoganas | Hollsopple | 2.8k |
| Ward Manufacturing Llc | Blossburg | 2.7k |
| American Tinning & Galvanizing Co. | Erie | 1.7k |
| V&s Lebanon Galvanizing Llc | Jonestown | 1.3k |
| Tenaris Koppel | Koppel | 1.2k |
| Cleveland-Cliffs Steelton Llc | Steelton | 1.2k |
| Shell Chemical Appalachia Llc | Monaca | 1.2k |
| Carpenter Technology Corp | Reading | 1.0k |
| Hanwha Philly Shipyard Inc | Philadelphia | 909 |
| Uss Mon Valley Works - Irvin Plant | West Mifflin | 799 |
| Pixelle Specialty Solutions Llc | Spring Grove | 742 |
| Valmont Pittsburgh Galvanizing | Midland | 731 |
| Seward Power Plant | New Florence | 334 |
| Matthews International Corp | Pittsburgh | 289 |
| Modineer - Pulverman | Dallas | 250 |
| Infinity Ltl | Morrisville | 238 |
| V&s Korns Galvanizing Llc | Johnstown | 218 |
| Precisionform Inc | Lititz | 177 |
| Sharretts Plating Co Inc | Emigsville | 148 |
| Playworld Inc | Lewisburg | 115 |
| Nestle Purina Petcare Co | Allentown | 114 |
| Kopp Glass Inc | Pittsburgh | 111 |
| Colver Green Energy | Colver | 106 |
| Scrubgrass Generating Plant | Kennerdell | 100 |
| Morgan Advanced Materials St Marys Site | Saint Marys | 95 |
| Bvpv Styrenics Llc | Monaca | 94 |
| Northampton Generating Plant | Northampton | 86 |
| Cornell Cookson | Mountain Top | 79 |
| Tate Access Floors Inc. | Red Lion | 76 |
| Royal Chemical Co | East Stroudsburg | 72 |
| Ati Flat Rolled Products Holdings Llc | Brackenridge | 68 |
| Jlg Industries Inc 1 Jlg Drive Facility | Mc Connellsburg | 59 |
| Sherwin-Williams Co | Lebanon | 48 |
| Sharon Coating Llc | Sharon | 42 |
| Wenger Feeds - Esbenshade Mill | Mount Joy | 31 |
| Ahf Products Lancaster Facility | Lancaster | 31 |
| Kenvue Brands Llc | Lititz | 30 |
| Us Steel Fairless Hills Works | Fairless Hills | 22 |
| Henkel Us Operation Corp | Hazleton | 21 |
| Vitro Flat Glass Llc Carlisle Plant | Carlisle | 17 |
| Rausch Creek Generation Llc | Tremont | 16 |
| General Dynamics Ots (Wilkes-Barre) Llc - Hanover Facility | Wilkes Barre | 16 |
| Hoeganaes Corp | Watsontown | 15 |
| Ppg Industriesinc-Springdale Complex | Springdale | 12 |
| Calgon Carbon Corp Neville Island Plant | Pittsburgh | 11 |
| Post Consumer Brands Llc | Meadville | 10 |
| Borchers Americas Inc. | Franklin | 10 |
| Carlisle Syntec A Div Of Carlisle Construction Materia | Carlisle | 10 |
| Avient Corp | Bethlehem | 10 |
| Surteco N.a. Inc. Jeannette Pa Plant | Jeannette | 10 |
| Holcim (Us) Inc. - Whitehall Plant | Whitehall | 7 |
| Kitchenman Terminal Co | Fairless Hills | 7 |
| Coherent Corp. | Saxonburg | 6 |
| Parker Lord Corp | Saegertown | 5 |
| Precision Kidd Steel Co | West Aliquippa | 5 |
| Zekelman Industries, Sharon Tube Division-Church St | Farrell | 5 |
| Wenger Feeds Llc-Rheems (F/K/A Wenger Feed Mill Inc) | Elizabethtown | 5 |
| Gilberton Power Co | Frackville | 5 |
| Wenger Feeds Llc-Muncy (F/K/A Wenger Feed Mill Inc) | Muncy | 4 |
| Valvoline Global - Rochester Pa | Rochester | 3 |
| Wenger Feeds Llc-Spring Glen (F/K/A Wenger Feed Mill Inc) | Spring Glen | 3 |
| Custom Processing Services Inc | Reading | 3 |
| Wenger Feeds Llc-Shippensburg (F/K/A Wenger's Feed Mill In | Shippensburg | 2 |
| Wenger Feeds Llc-Hempfield (F/K/A Wenger Feed Mill Inc) | Lancaster | 2 |
| Heubach Ltd | Fairless Hills | 2 |
| Wenger Feeds Llc-Mount Joy (F/K/A Wenger's Feed Mill Inc) | Mount Joy | 1 |
| Buzzi Unicem Stockertown Plant | Stockertown | 1 |
| Akzo Nobel Coatings Inc. | Reading | 1 |
| Kalas Manufacturing Inc Plant 2 | Denver | 1 |
| Nalco Co | Ellwood City | 0 |
| American Refining Group Inc. | Bradford | 0 |
| Sylvin Technologies Inc. | Denver | 0 |
| Apollo Metals Ltd | Bethlehem | 0 |
| Corry Rubber Corp | Corry | 0 |
| Chestnut Ridge Foam Inc | Latrobe | 0 |
| Lanxess Corp Neville Island | Pittsburgh | 0 |
| Glen-Gery Corp - Pittsburgh Plant | Cheswick | 0 |
| Ppc Lubricants Llc | Butler | 0 |
| Specialty Tires Of America Inc | Indiana | 0 |
| Snap-Tite Hose/ Union City | Union City | 0 |
| Nestle Purina Petcare Co | Mechanicsburg | 0 |
| Captiveaire Systems Inc | Bedford | 0 |
| World Resources Co | Pottsville | 0 |
| Adm Animal Nutrition Inc | Camp Hill | 0 |
| Jlg Industries Inc Shippensburg Facility | Shippensburg | 0 |