| Pcs Nitrogen Ohio L.p. | Lima | 2.1M |
| Ineos Nitriles Usa Llc | Lima | 1.9M |
| Scotts Co | Marysville | 514.7k |
| Owens Corning Insulating Systems Llc Newark Oh Facility | Newark | 187.6k |
| Fairborn Cement Co | Xenia | 185.0k |
| Holcim (Us) (Including Systech Env. Corp.) | Paulding | 170.2k |
| Johns Manville Corp Plant 8 | Defiance | 168.2k |
| Momentive Performance Materials Quartz Inc-Newark Plant | Hebron | 138.2k |
| Vickery Environmental Inc. | Vickery | 109.0k |
| Ohio Refining Co | Oregon | 108.9k |
| The Shepherd Color Co | Cincinnati | 82.6k |
| Kellanova - Cincinnati Bakery | Cincinnati | 66.3k |
| Pixelle Specialty Solutions Llc | Chillicothe | 57.1k |
| Osco Industries Inc Jackson Div | Jackson | 47.5k |
| Honda Development & Manufacturing Of America Llc - Anna E | Anna | 43.7k |
| Linde Toledo Facility | Oregon | 43.0k |
| Ironunits Llc | Toledo | 33.8k |
| Cleveland-Cliffs Cleveland Works Llc | Cleveland | 33.4k |
| Altenloh Brinck & Co. U.s. Inc | Pioneer | 33.1k |
| Kraton Corp | Belpre | 31.5k |
| Anheuser-Busch Columbus Brewery | Columbus | 31.4k |
| Johns Manville Plant 2 | Defiance | 28.7k |
| Basf Corp | Elyria | 27.6k |
| Schaeffler Transmission Llc | Wooster | 23.2k |
| Cleveland-Cliffs Cleveland Works Llc Dba Cleveland-Cliffs Wa | Warren | 20.7k |
| Lima Refining Co | Lima | 19.8k |
| Dfa Dairy Brands Ice Cream Llc. Dba Frostbite Frozen Product | Toledo | 17.0k |
| Trammo Nitrogen Products Inc. C/O Lemm Corp - Operat | North Bend | 14.9k |
| Dowa Tht America Inc | Bowling Green | 12.6k |
| Nsg Glass N.a. Inc | Luckey | 12.3k |
| Toledo Refining Co Llc | Oregon | 11.4k |
| Fresh Mark Salem | Salem | 11.1k |
| Gavin Power Llc | Cheshire | 10.6k |
| Superior Dairy | Canton | 10.2k |
| Cardinal Plant | Brilliant | 8.9k |
| Poet Biorefining-Fostoria | Fostoria | 8.1k |
| Pratt Paper (Oh) Llc | Wapakoneta | 7.3k |
| Dayton Bag & Burlap | Dayton | 7.2k |
| Fort Amanda Specialties Llc | Lima | 6.0k |
| General Mills Inc | Wellston | 4.8k |
| Sauder | Archbold | 4.8k |
| Pro-Tec Coating Co | Leipsic | 3.5k |
| Nachurs Alpine Solutions | Marion | 2.9k |
| Cleveland-Cliffs Columbus Llc | Columbus | 2.8k |
| Bellisio Foods | Jackson | 2.3k |
| Primary Products Ingredients Americas Llc - Dayton | Dayton | 1.7k |
| Hydro-Aire Aerospace Corp. | Elyria | 1.6k |
| Emery Oleochemicals Llc Cincinnati Plant | Cincinnati | 1.5k |
| Monogram Metals Inc | Byesville | 1.3k |
| Momentive Performance Materials Quartz Inc | Strongsville | 1.2k |
| Austin Powder Co | Mc Arthur | 996 |
| Synthomer Inc-Mogadore Plant | Mogadore | 744 |
| Solvay Usa Inc | Cincinnati | 694 |
| Eaton Corp | Cleveland | 684 |
| Parker Trutec | Springfield | 682 |
| Marathon Petroleum Co Lp Ohio Refining Div | Canton | 642 |
| Euclid Heat Treating Co | Euclid | 639 |
| Airgas Specialty Products - Delphos Oh | Delphos | 613 |
| Miami Fort Power Co Llc | North Bend | 580 |
| Dupont Circleville Plant | Circleville | 550 |
| Veolia Water Technologies & Solutions - New Phila. | New Philadelphia | 410 |
| Gfs Chemicals Inc | Columbus | 316 |
| Cooper Farms Cooked Meats | Van Wert | 270 |
| Milacron Plastics Technologies Group Llc-Mt Orab | Mount Orab | 203 |
| Carlisle Brake & Friction | Medina | 120 |
| Cincinnati Steel Treating Co | Cincinnati | 119 |
| Univar Usa Inc.- Cincinnati Oh Branch | Cincinnati | 53 |
| Erie Steel Ltd | Toledo | 10 |
| Plasman Cleveland Manufacturing | Cleveland | 10 |
| Wampum Hardware Co. | Salesville | 1 |
| Ross Incineration Services Inc | Grafton | 0 |
| Heritage Thermal Services | East Liverpool | 0 |
| Thermal Treatment Center Inc | Wickliffe | 0 |
| Winston Heat Treating Inc | Dayton | 0 |
| Parker Hannifin Hvd | Elyria | 0 |
| Jtm Provisions Co Inc | Harrison | 0 |
| Cindus Corp | Cincinnati | 0 |
| The Andersons Upper Sandusky Terminal | Upper Sandusky | 0 |
| Brewster Cheese Co Inc. | Brewster | 0 |
| Colgate-Palmolive Co Cambridge Plant | Cambridge | 0 |
| Lubrizol Advanced Materials Inc Bowling Green | Bowling Green | 0 |