| Uss Gary Works | Gary | 293.5k |
| Gibson Generating Station | Owensville | 140.2k |
| Cleveland-Cliffs Burns Harbor Llc | Burns Harbor | 70.0k |
| Nipsco R.m.schahfer Generating Station | Wheatfield | 44.3k |
| Merom Generating Station | Sullivan | 38.7k |
| Rockport Plant | Rockport | 17.5k |
| Us Army National Guard Camp Atterbury Ranges | Edinburgh | 15.5k |
| Clifty Creek Station | Madison | 15.0k |
| Alcoa Warrick Newco Llc | Newburgh | 13.1k |
| Buzzi Unicem Usa-Greencastle Plant | Greencastle | 12.9k |
| Heidelberg Materials Us Cement Llc | Logansport | 9.0k |
| Duke Energy Indiana Inc. Cayuga Generating Station | Cayuga | 8.6k |
| Nucor Steel | Crawfordsville | 941 |
| C&d Technologies Inc | Attica | 887 |
| Steel Dynamics Inc Structural & Rail Div | Columbia City | 846 |
| Cleveland-Cliffs Steel Llc | East Chicago | 564 |
| Sdi Lafarga Llc | New Haven | 479 |
| Steel Dynamics Inc-Flat Roll Div | Butler | 463 |
| Toyota Motor Manufacturing Indiana Inc | Princeton | 449 |
| Ardagh Glass Inc | Winchester | 414 |
| Ardagh Glass Inc | Dunkirk | 374 |
| Grede Llc | New Castle | 345 |
| The Ford Meter Box Co Inc | Wabash | 335 |
| Owens Brockway Glass Container Inc Plant #08 | Lapel | 297 |
| Indiana Harbor Coke Co Lp | East Chicago | 259 |
| Steel Dynamics Inc-Engineered Bar Products Div | Pittsboro | 221 |
| Bear Run Mine | Carlisle | 175 |
| Elkhart Brass Manufacturing Co Inc | Elkhart | 172 |
| Cleveland-Cliffs Steel Llc | East Chicago | 168 |
| Hammond Lead Products | Hammond | 157 |
| Waupaca Foundry-Plant 5 | Tell City | 148 |
| Garfield Facility Llc | Muncie | 117 |
| Waelz Sustainable Products Llc | Logansport | 116 |
| Us Steel Corp Midwest Plant | Portage | 97 |
| Sigeco F B Culley Generating Station | Newburgh | 92 |
| Owens Corning Roofing & Asphalt Llc | Brookville | 74 |
| North Vernon Industry Corp | North Vernon | 61 |
| Ecobat Resources Indiana Llc | Indianapolis | 54 |
| Real Alloy Specification Llc | Wabash | 47 |
| Ipl Petersburg | Petersburg | 46 |
| Bci Solutions Inc. | Bremen | 38 |
| Cargill Texturizing Solutions | Hammond | 37 |
| Duke Energy Indiana Inc. - Edwardsport Igcc | Edwardsport | 29 |
| Real Alloy Recycling Llc | Wabash | 27 |
| Anchor Glass Container Corp-Lawrenceburg | Lawrenceburg | 25 |
| Countrymark Refining & Logistics Llc | Mount Vernon | 24 |
| Prysmian Cables & Systems Usa Llc | Indianapolis | 16 |
| Superior Aluminum Alloys Llc | New Haven | 15 |
| Kaiser Aluminum Warrick Llc | Newburgh | 14 |
| Elanco Clinton Laboratories | Clinton | 7 |
| Metal Source Llc | Huntington | 6 |
| Nipsco Michigan City Generating Station | Michigan City | 5 |
| International Paper Co | Cayuga | 3 |
| Bulldog Battery Corp | Wabash | 3 |
| Reclaimed Energy Div Superior Industrial Solutions In | Connersville | 2 |
| Allison Transmission Inc | Indianapolis | 2 |
| Piezotech Llc | Indianapolis | 2 |
| Tradebe Treatment & Recycling Llc | East Chicago | 2 |
| Citgo Petroleum Corp | East Chicago | 1 |
| Advanced Bearing Materials Llc | Greensburg | 1 |
| Pratt Paper (In) Llc | Valparaiso | 1 |
| Us Gypsum Co | East Chicago | 1 |
| Us Gypsum Co | Shoals | 1 |
| Carmeuse Lime Inc Buffington | Gary | 1 |
| Whitewater Valley Generating Station | Richmond | 1 |
| Polyjohn Enterprises Corp | Whiting | 1 |
| Wabash Castings Llc | Wabash | 1 |
| Building Materials Manufacturing Llc | Michigan City | 1 |
| Georgia-Pacific Gypsum Llc | Wheatfield | 1 |
| Donaldson Co Inc | Frankfort | 0 |
| Gold Bond Building Products - Shoals | Shoals | 0 |
| Wise Technical Manufacturing | New Albany | 0 |
| Prysmian Cables & Systems Usa Llc | Marion | 0 |
| Arcosa Lw Hpb Llc | Mooresville | 0 |
| Avery Dennison Mfd | Lowell | 0 |
| Pvs Technologies Inc. | Portage | 0 |
| Butler Mill Service Co | Butler | 0 |
| Oldcastle Apg - Indianapolis | Indianapolis | 0 |
| Columbia City Mill Services | Columbia City | 0 |
| Pvs Technologies Inc. | Burns Harbor | 0 |
| Novelis Corp | Terre Haute | 0 |
| Electric Coating Technologies Llc D/B/A Material Sciences Co | East Chicago | 0 |
| Tms International Llc | Gary | 0 |
| Aearo Technologies Llc | Indianapolis | 0 |
| Vp Racing Fuels Inc. | Terre Haute | 0 |
| Proform Finishing Products - Jasper | Rensselaer | 0 |
| Permabase Building Products - Clinton | Clinton | 0 |
| Oldcastle Lawn & Garden | Noblesville | 0 |
| Oldcastle Lawn & Garden | Waterloo | 0 |
| Pvs Technologies Inc | Grandview | 0 |
| Ricca Chemical Co Llc | Batesville | 0 |
| Ticona Polymers Inc | Evansville | 0 |
| Lyondellbasell Advanced Polymers Inc. | Evansville | 0 |
| Master Guard Llc | Veedersburg | 0 |
| Sumco Llc | Indianapolis | 0 |
| Marathon Petroleum Co - Indianapolis Asphalt Terminal | Indianapolis | 0 |
| Safety-Kleen Systems Inc. | East Chicago | 0 |
| Hammond Group Inc- Expanders 3100 | Hammond | 0 |
| Mor/Ryde International Inc | Elkhart | 0 |
| Kyb Americas Corp | Franklin | 0 |