| Vickery Environmental Inc. | Vickery | 1.1M |
| Pcs Nitrogen Ohio L.p. | Lima | 39.3k |
| Howmet Aerospace Cleveland Works | Cuyahoga Heights | 32.2k |
| Lake City Plating | Jefferson | 30.6k |
| Cleveland-Cliffs Steel Corp | Coshocton | 14.6k |
| Austin Powder Co | Mc Arthur | 5.0k |
| Techmetals Inc. | Dayton | 5.0k |
| First Solar Inc | Walbridge | 4.1k |
| Lake City Plating Plant 2 | Ashtabula | 3.7k |
| Gfs Chemicals Inc | Columbus | 3.0k |
| Silfex Inc | Springfield | 2.3k |
| Rmi Titanium Co Llc | Niles | 2.2k |
| Plating Technology Inc. Dayton Plant | Dayton | 2.1k |
| Turbine Engine Component Technology Corp | Euclid | 2.0k |
| Anomatic Corp - Ohio Plant Ii | New Albany | 1.6k |
| Itw Bedford Wire | Bedford Heights | 1.2k |
| Ge Engine Services Acsc/C Container Pl. | Cincinnati | 1.1k |
| Materion Brush Inc | Elmore | 1.1k |
| Norman Noble Inc Medtech 1 | Highland Heights | 1.1k |
| Gfs Chemicals Inc - Kaderly | Columbus | 993 |
| The Andersons Upper Sandusky Terminal | Upper Sandusky | 750 |
| First Solar Inc | Perrysburg | 750 |
| Silfex Inc | Eaton | 695 |
| Columbia Chemical Corp | Brunswick | 646 |
| Fort Amanda Specialties Llc | Lima | 610 |
| Neograf Solutions Llc | Lakewood | 592 |
| Worthington Foods Inc | Zanesville | 522 |
| Advics Manufacturing Ohio Inc | Lebanon | 440 |
| Titanium Metals Corp | Toronto | 370 |
| General Dynamics (Gd-Ots) | Springboro | 330 |
| Ohio Anodizing Co. Inc. | Columbus | 304 |
| Dubois Chemicals Inc. - Sharonville Oh (50) | Cincinnati | 255 |
| Tamarack Farms Dairy | Newark | 250 |
| Guaranteed Finishing Unlimited Inc | Cleveland | 243 |
| Hyperion Materials & Technologies - Worthington | Worthington | 220 |
| Basf Corp | Elyria | 151 |
| Shepherd Chemical Co | Cincinnati | 120 |
| Anomatic Corp | Newark | 91 |
| Royal Chemical Co | Macedonia | 45 |
| City Plating | Cleveland | 36 |
| Trammo Nitrogen Products Inc. C/O Lemm Corp - Operat | North Bend | 35 |
| Environmental Enterprises Inc | Cincinnati | 24 |
| Honda Development & Manufacturing Of America Llc | East Liberty | 24 |
| Sifco Forge Group Inc. | Cleveland | 22 |
| Erieview Metal Treating Co | Cleveland | 18 |
| Ppg Euclid Pretreatment & Specialty Products | Euclid | 16 |
| Hohman Plating & Manufacturing Inc | Dayton | 14 |
| Mcgean-Rohco Inc | Cleveland | 10 |
| Micro Metal Finishing Llc | Cincinnati | 10 |
| Western Enterprises | Avon Lake | 10 |
| Plasman Cleveland Manufacturing | Cleveland | 10 |
| Luke Engineering & Manufacturing Co Wadsworth Plant | Wadsworth | 10 |
| Swagelok Manufacturing Co Llc | Highland Heights | 9 |
| Pvs Nolwood Chemicals Inc. | Sharonville | 5 |
| Dfa Dairy Brands Fluid Llc Dba Reiter Dairy | Springfield | 5 |
| Rothenbuhler Cheesemakers | Middlefield | 4 |
| Reworld Tron Corp | Avon | 1 |
| Martin Marietta Magnesia Specialties Woodville | Woodville | 0 |
| Ross Incineration Services Inc | Grafton | 0 |
| Visionmark Nameplate Co | New Bremen | 0 |
| G&s Bar & Wire Llc | Wooster | 0 |
| Chemstation Dayton | Dayton | 0 |
| Sugar Creek Packing Co | Washington Court House | 0 |
| Abbott Laboratories | Tipp City | 0 |
| Envirite Of Ohio Inc | Canton | 0 |
| Bellisio Foods | Jackson | 0 |
| Danone Us Llc | Minster | 0 |
| Superior Dairy | Canton | 0 |
| Magellan Aerospace Middletown Inc. | Middletown | 0 |
| Smithfoods Orrville Inc. | Orrville | 0 |
| Frito Lay Inc | Wooster | 0 |
| United Surface Finishing | Canton | 0 |
| Perrigo Pbm Covington Llc | Covington | 0 |
| Goodrich Aircraft Wheels & Brakes | Troy | 0 |
| Calvary Industries Inc. | Fairfield | 0 |
| Brewster Cheese Co Inc. | Brewster | 0 |
| Campbell Soup Supply Co Llc | Napoleon | 0 |
| Bobbie Baby Inc (Formerly Nature's One) | Heath | 0 |
| Land O'lakes - Kent | Kent | 0 |
| Tipp City Purple Cow Creamery | Tipp City | 0 |
| Shearers Foods Massillon Oh | Massillon | 0 |
| Shearer's Foods | Brewster | 0 |
| Koch Foods Of Fairfield | Fairfield | 0 |
| American Craft Brewery Llc | Cincinnati | 0 |
| Danfoss Power Solutions - Van Wert | Van Wert | 0 |
| Koch Foods Of Fairfield Plant B | Hamilton | 0 |
| West Jefferson- Mfi | West Jefferson | 0 |
| Solvay Usa Inc | Cincinnati | 0 |
| Alliance Tubular Products Llc | Alliance | 0 |
| Molson Coors Usa Llc - Trenton Brewery | Trenton | 0 |
| Electro Plating & Fab Co | Cleveland | 0 |
| Nippon Paint Automotive Americas, Inc | Cleveland | 0 |
| Parker Rust-Proof Of Cleveland | Cleveland | 0 |