| Cleveland-Cliffs Cleveland Works Llc | Cleveland | 121.0k |
| Gavin Power Llc | Cheshire | 59.0k |
| Cardinal Plant | Brilliant | 33.7k |
| Kyger Creek Station | Cheshire | 26.5k |
| Martin Marietta Magnesia Specialties Woodville | Woodville | 2.6k |
| Cleveland-Cliffs Inc. | Middletown | 955 |
| Pengg Wmc Llc | Bedford | 631 |
| Graymont Dolime (Oh) Inc. | Genoa | 494 |
| Federal Metal Co | Oakwood Village | 373 |
| Nucor Steel Marion Inc | Marion | 343 |
| Haverhill Coke Co Llc | Franklin Furnace | 306 |
| Crown Battery Manufacturing Co | Fremont | 299 |
| Owens-Brockway Glass Container Inc Plant 12 | Zanesville | 267 |
| Pixelle Specialty Solutions Llc | Chillicothe | 175 |
| Miami Fort Power Co Llc | North Bend | 172 |
| North Star Bluescope Steel Llc | Delta | 172 |
| Clarios Llc | Holland | 149 |
| Amg Vanadium Llc | Cambridge | 132 |
| Middletown Coke Co | Middletown | 126 |
| American Rheinmetall | Saint Marys | 121 |
| Vallourec Star Lp | Youngstown | 120 |
| Mcwane Ductile Ohio | Coshocton | 120 |
| Pilkington N.a. Inc | Rossford | 112 |
| Jsw Steel Usa Ohio Inc. | Mingo Junction | 106 |
| Ohio Refining Co | Oregon | 94 |
| Cleveland-Cliffs Steel Corp - Mansfield Works | Mansfield | 94 |
| Owens Corning Insulating Systems Llc Newark Oh Facility | Newark | 87 |
| Envirite Of Ohio Inc | Canton | 78 |
| Ferroglobe Usa Metallurgical Inc | Waterford | 55 |
| Kaiser Aluminum Fabricated Products Llc. | Heath | 52 |
| Osco Industries Inc Portsmouth Div | Portsmouth | 41 |
| Bekaert Corp | Orrville | 40 |
| Osco Industries Inc New Boston Div | New Boston | 37 |
| Marathon Petroleum Co Lp Ohio Refining Div | Canton | 37 |
| Miba Bearings Us Llc | Mc Connelsville | 34 |
| Wieland Chase | Montpelier | 29 |
| Protech Powder Coatings Dba Chemionics Corp | Tallmadge | 29 |
| Charter Manufacturing Co. Inc. | Cuyahoga Heights | 26 |
| St. Marys Foundry Ltd. | Saint Marys | 25 |
| Johns Manville Plant 01 | Waterville | 25 |
| Walleye Power Llc - Bay Shore Plant | Oregon | 22 |
| Fairborn Cement Co | Xenia | 21 |
| Lima Refining Co | Lima | 21 |
| Amg Vanadium Llc | Zanesville | 19 |
| Osco Industries Inc Jackson Div | Jackson | 18 |
| Cleveland-Cliffs Cleveland Works Llc Dba Cleveland-Cliffs Wa | Warren | 17 |
| Dover Light & Power | Dover | 14 |
| Holcim (Us) (Including Systech Env. Corp.) | Paulding | 11 |
| Stoneco Plant 110 | Maumee | 10 |
| Vibrantz Corp | Cleveland | 10 |
| The G A Avril Co White Metal Prod Div | Cincinnati | 9 |
| Lubrizol Corp Painesvil Le Plant | Painesville | 6 |
| Advance Bronze Seville Llc | Seville | 5 |
| Essity Operations Wausau Llc | Middletown | 4 |
| Us Gypsum Co | Gypsum | 4 |
| Imperial Aluminum-Minerva Llc | Minerva | 3 |
| Graphic Packaging International Inc. | Middletown | 2 |
| Gnw Aluminum Inc | Alliance | 2 |
| Novelis Alr Rolled Products Inc | Uhrichsville | 2 |
| Johns Manville Plant 2 | Defiance | 2 |
| Polymerics Inc | Cuyahoga Falls | 1 |
| Pratt Paper (Oh) Llc | Wapakoneta | 1 |
| Shepherd Chemical Co | Cincinnati | 1 |
| Imco Recycling Of Ohio Llc | Uhrichsville | 1 |
| Ppg Industries Ohio Inc Circleville Oh | Circleville | 1 |
| Owens Corning - Medina | Medina | 1 |
| Ross Incineration Services Inc | Grafton | 1 |
| Quaker City Castings | Salem | 1 |
| Luxium Solutions | Newbury | 1 |
| The Shepherd Color Co | Cincinnati | 0 |
| Cirba Solutions Us Inc | Lancaster | 0 |
| Cleveland-Cliffs Steel Corp | Coshocton | 0 |
| Wooster Products Inc | Wooster | 0 |
| Titanium Metals Corp | Toronto | 0 |
| Edward C Levy Inc | Canton | 0 |
| Albco Foundry Inc | Lisbon | 0 |
| Cleveland-Cliffs Columbus Llc | Columbus | 0 |
| Environmental Enterprises Inc | Cincinnati | 0 |
| Johns Manville Corp Plant 8 | Defiance | 0 |
| Cleveland-Cliffs Steel Corp - Zanesvi Lle Works | Zanesville | 0 |
| Snyder Manufacturing Inc | Dover | 0 |
| Fulton Mill Service | Delta | 0 |
| Oldcastle Apg - Sheffield | Sheffield Lake | 0 |
| Marathon Petroleum Co - North Bend Oh Terminal | North Bend | 0 |
| Contitech Usa Llc | Marysville | 0 |
| Oldcastle Apg - Cincinnati | Cincinnati | 0 |
| First Solar Inc | Perrysburg | 0 |
| Ppg Euclid Pretreatment & Specialty Products | Euclid | 0 |
| Profusion Industries Llc | Marietta | 0 |
| First Solar Inc | Walbridge | 0 |
| Stein Llc | Cleveland | 0 |
| Stein Llc | Middletown | 0 |
| Viasystems Technologies Corpllc | North Jackson | 0 |
| Tms International Llc | Girard | 0 |
| Tms International Llc | Cuyahoga Heights | 0 |
| Stein, Llc | Mansfield | 0 |
| Energizer Holdings Inc | Marietta | 0 |
| Hb Chemical - Ravago Chemical Distribution Inc | Newbury | 0 |
| Oldcastle Lawn & Garden | Hartville | 0 |
| Oldcastle Lawn & Garden | Springfield | 0 |