| TTThermo Trilogy CORP | Columbia | MD | Chemical Manufacturing325320 | — | ◐ LIKELY ACTIVE |
| WRW R Grace & CO Conn | Columbia | MD | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| ABAdvanced Bioscience Laboratories, INC | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| ALAerosol Liquid Packaging | Baltimore | MD | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| AUAirgas Usa, LLC | Hyattsville | MD | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| ARAlexandria Real Estate Equities, INC. | Rockville | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| ASAll State Welding Products | Taneytown | MD | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| ACArcal Chemicals INC | Seat Pleasant | MD | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| AIAshland INC | Elkton | MD | Chemical Manufacturing325132 | — | ◇ UNVERIFIED |
| APAstrazeneca, Plp | Frederick | MD | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| AUAtotech USA | Baltimore | MD | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| ASAuto-chlor Systems of Baltimore | Baltimore | MD | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| BIBarre-national INC. | Woodlawn | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| BIBlind Industries and Services of Md | Baltimore | MD | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| BSBraden Sutphin Ink CO | Savage | MD | Chemical Manufacturing325910 | — | ◇ UNVERIFIED |
| CPCapricorn Pharma | Frederick | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| CBCatalent Bwi-1 | Harmans | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| CCCentral Chemical CORP | Elkton | MD | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| CCCentral Chemical (hagerstown) | Hagerstown | MD | Chemical Manufacturing325312 | — | ◇ UNVERIFIED |
| CMClorox Manufacturing Company | Aberdeen | MD | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| DPDwyer Property Ground Water Plume | Elkton | MD | Chemical Manufacturing325130 | — | ◇ UNVERIFIED |
| EIEisai, INC | Baltimore | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| EIEisai, INC. | Baltimore | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| EFElkton Farm Firehole | Elkton | MD | Chemical Manufacturing325920 | — | ◇ UNVERIFIED |
| EBEmergent Biosolutions | Rockville | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| ERExcalibur Realty Company | Beltsville | MD | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| FAFarmers and Planters Ag Llc> | Salisbury | MD | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| FTFleetwood Travel Trailers | Hancock | MD | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| GSGeo Specialty Chemicals | Baltimore | MD | Chemical Manufacturing325131 | — | ◇ UNVERIFIED |
| GUGlaxosmithkline USA | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| GCGoldwell Cosmetics USA INC | Linthicum Heights | MD | Chemical Manufacturing325620 | — | ◇ UNVERIFIED |
| GWGore, W.l. - Elk Creek Plant | Elkton | MD | Chemical Manufacturing325221 | — | ◇ UNVERIFIED |
| GMGti Maryland LLC | Centreville | MD | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| HGHuman Genome Sciences, Inc., Small Scale Manufacturing | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| HGHuman Genome Sciences, Plant 1 | Rockville | MD | Chemical Manufacturing325413 | — | ◇ UNVERIFIED |
| IPInsl-x Products CORP. | Baltimore | MD | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| ITIntercoastal Trading INC | Cambridge | MD | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| IRIntracel Resources LLC | Frederick | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| IIIntralytix INC | Baltimore | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| IIIntralytix, INC. | Columbia | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| KWKemira Water Solutions, INC. - Baltimore Plant | Curtis Bay | MD | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| KFKeymar Fertilizer, INC. | Keymar | MD | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| KPKite Pharma, INC. | Frederick | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| LCLamotte Company | Chestertown | MD | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| LCLebanon Chemical 50 | Baltimore | MD | Chemical Manufacturing325312 | — | ◇ UNVERIFIED |
| LBLegend Brands | Baltimore | MD | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
 Life Technologies | Frederick | MD | Chemical Manufacturing325413 | — | ◇ UNVERIFIED |
| LTLife Technologies | Frederick | MD | Chemical Manufacturing325413 | — | ◇ UNVERIFIED |
| LMLynch, Md | Worton | MD | Chemical Manufacturing325312 | — | ◇ UNVERIFIED |
| MCMaryland Compassionate Care and Wellness | Taneytown | MD | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
