| APAdell Plastics | Halethorpe | MD | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| AWAes Warrior Run Cogeneration Facility | Cumberland | MD | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
Akonni Biosystems INC | Frederick | MD | Chemical Manufacturing325413 | 1-19 | ◐ LIKELY ACTIVE |
| AUAmerican Urethane INC. | Odenton | MD | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| BSBeynon Sports Surfaces, INC. | Hunt Valley | MD | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| CLC-care, LLC | Linthicum Heights | MD | Chemical Manufacturing325620 | 100-499 | ◐ LIKELY ACTIVE |
| DGDap Global INC. | Baltimore | MD | Chemical Manufacturing325520 | 100-499 | ◐ LIKELY ACTIVE |
| NPNeutron Products, INC. | Dickerson | MD | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| TDTilley Distribution | Middle River | MD | Chemical Manufacturing325130 | 100-499 | ◐ LIKELY ACTIVE |
| IIIntralytix, INC. | Columbia | MD | Chemical Manufacturing325414 | 20-99 | ◐ LIKELY ACTIVE |
| VIValpac, INC | Federalsburg | MD | Chemical Manufacturing325520 | 20-99 | ◐ LIKELY ACTIVE |
| VMVorbeck Materials CORP. | Jessup | MD | Chemical Manufacturing325180 | 1-19 | ◐ LIKELY ACTIVE |
| ARAmg Resources CORP | Baltimore | MD | Chemical Manufacturing325131 | — | ◐ LIKELY ACTIVE |
| BDBecton Dickinson | Cockeysville | MD | Chemical Manufacturing325413 | — | ◐ LIKELY ACTIVE |
| CICeleste Industries Corporation | Easton | MD | Chemical Manufacturing325611 | 20-99 | ◐ LIKELY ACTIVE |
| EPEngineered Polymer Solutions, INC. | Williamsport | MD | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| RCRicca Chemical CO. | Pocomoke City | MD | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| RCRust-oleum CORP | Williamsport | MD | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
| SCSherwin-williams Company | Baltimore | MD | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
| WRW R Grace and CO – Curtis Bay Works | Curtis Bay | MD | Chemical Manufacturing325130 | — | ◐ LIKELY ACTIVE |
| BIBsc Ind | Baltimore | MD | Chemical Manufacturing325320 | — | ◐ LIKELY ACTIVE |
Colonial Metals INC - Triumph Industrial Park Bldg 20 | Elkton | MD | Chemical Manufacturing325131 | — | ◐ LIKELY ACTIVE |
| IPIneos Pigments Usa, INC | Glen Burnie | MD | Chemical Manufacturing325998 | 100-499 | ◐ LIKELY ACTIVE |
| KWKemira Water Solutions, INC. | Baltimore | MD | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| MPMccormick Paint Works CO | Frederick | MD | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
| MBMiltenyl Biotec North America INC | Gaithersburg | MD | Chemical Manufacturing325412 | 500+ | ◐ LIKELY ACTIVE |
| NSNaval Surface Warfare Center | Indian Head | MD | Chemical Manufacturing325920 | — | ◐ LIKELY ACTIVE |
| NDNew Dawn Manufacturing CO | Upper Marlboro | MD | Chemical Manufacturing325611 | — | ◐ LIKELY ACTIVE |
| NCNoxell CORP | Hunt Valley | MD | Chemical Manufacturing325620 | — | ◐ LIKELY ACTIVE |
| VTVibrantz Technologies | Curtis Bay | MD | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| WRW R Grace & CO Conn | Columbia | MD | Chemical Manufacturing325180 | 100-499 | ◐ LIKELY ACTIVE |
Astek Diagnostics INC. | Halethorpe | MD | Chemical Manufacturing325413 | — | ◐ LIKELY ACTIVE |
| BBioreliance | Rockville | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
Biotechpharma CORP | Severna Park | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
Haemo-sol International, LLC | Towson | MD | Chemical Manufacturing325611 | — | ◐ LIKELY ACTIVE |
| HDHemagen Diagnostics, INC. | Baltimore | MD | Chemical Manufacturing325413 | 1-19 | ◐ LIKELY ACTIVE |
Jubilant Cadista Pharmaceuticals, INC. | Salisbury | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| CMCatalent Maryland, INC. | Rockville | MD | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| CMCatalent Maryland INC - Baltimore | Baltimore | MD | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| TCTishcon Corporation | Salisbury | MD | Chemical Manufacturing325412 | 100-499 | ◐ LIKELY ACTIVE |
| APAurinia Pharma US INC | Rockville | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| BCBaltimore City Composting/veolia Water North America-central, LLC | Curtis Bay | MD | Chemical Manufacturing325311 | — | ◐ LIKELY ACTIVE |
| BCBerkshire Corporation (formerly Disinfexol, Llc) | Rockville | MD | Chemical Manufacturing325612 | — | ◐ LIKELY ACTIVE |
| BPBora Pharmaceuticals Injectables INC. | Baltimore | MD | Chemical Manufacturing325412 | 100-499 | ◐ LIKELY ACTIVE |
| CCClariant CORP Masterb Atches Div | Millington | MD | Chemical Manufacturing325991 | — | ◐ LIKELY ACTIVE |
| CPCreative Print Group, INC. | Halethorpe | MD | Chemical Manufacturing325910 | — | ◐ LIKELY ACTIVE |
| FIFibred-maryland, INC. | Cumberland | MD | Chemical Manufacturing325221 | — | ◐ LIKELY ACTIVE |
| FCFmc CORP. Organic Chemicals Division | Baltimore | MD | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| GBGreenlight Biofuels Princess Anne, LLC | Princess Anne | MD | Chemical Manufacturing325193 | — | ◐ LIKELY ACTIVE |
| HJHuber, J.m. Corporation | Havre De Grace | MD | Chemical Manufacturing325130 | — | ◐ LIKELY ACTIVE |