| MCModineer Company | Benton Harbor | MI | — | ◇ UNVERIFIED |
| MSModular Solid Surfaces, LLC | Lakeland | FL | — | ◇ UNVERIFIED |
| MSMomentive Specialty Chemicals INC | Demopolis | AL | — | ◇ UNVERIFIED |
| MSMomentive Specialty Chemicals INC Mt Jewett Facility | Mount Jewett | PA | — | ◇ UNVERIFIED |
| MCMonsanto CO | Kenilworth | NJ | — | ◇ UNVERIFIED |
| MCMontrose Chemical Corporation of Ca -henderson, Nevada Site | Henderson | NV | — | ◇ UNVERIFIED |
| MCMorgan County Renewable Fuels, LLC | Log Lane Village, 3.5 Mi Sw of | CO | — | ◇ UNVERIFIED |
| MLMorris Lister Avenue Assn | Newark | NJ | — | ◇ UNVERIFIED |
| MMMountain Marble Manufacturing INC | Prescott Valley | AZ | — | ◇ UNVERIFIED |
| MPMrc Polymers INC | Chicago | IL | — | ◇ UNVERIFIED |
| MSMulticolor Specialties INC | Cicero | IL | — | ◇ UNVERIFIED |
| MCMuralo CO INC Norton & Son Div | Bayonne | NJ | — | ◇ UNVERIFIED |
| MIMylec INC | Winchendon | MA | — | ◇ UNVERIFIED |
| NINA Industries Pasadena | Seabrook | TX | — | ◇ UNVERIFIED |
| NBNational Bronze Powder CO INC | Franklin Park | IL | — | ◇ UNVERIFIED |
| NCNational Casein | Tyler | TX | — | ◇ UNVERIFIED |
| NPNational Patent Development CO Hydron Me | New Brunswick | NJ | — | ◇ UNVERIFIED |
| NPNational Peening Incorporated | Salem | VA | — | ◇ UNVERIFIED |
| NPNational Plastics Color | Valley Center | KS | — | ◇ UNVERIFIED |
| NTNational Trail Biodiesel Group LLC | Newton | IL | — | ◇ UNVERIFIED |
 Ncp Coatings, INC. (mishawaka Facility) | Mishawaka | IN | — | ◇ UNVERIFIED |
| NSNeel Schaffer Inc, Jitney Jr Number 617 | Tchula | MS | — | ◇ UNVERIFIED |
| NBNelson Biotechnologies INC | Flagstaff | AZ | — | ◇ UNVERIFIED |
| NCNeville Chemical CO | Anaheim | CA | — | ◇ UNVERIFIED |
| NANewark Armed Forces Reserve Center | Newark | DE | — | ◇ UNVERIFIED |
| NENew Eden Energy LLC | Saint Cloud | FL | — | ◇ UNVERIFIED |
| NENew England Laminates CO INC | Walden | NY | — | ◇ UNVERIFIED |
| NENew England Plastic | Norton | MA | — | ◇ UNVERIFIED |
| NMNew Model Cleaners INC. | Boston | MA | — | ◇ UNVERIFIED |
| NPNew Pig CORP | Tipton | PA | — | ◇ UNVERIFIED |
| NDNext Diesel | Adrian | MI | — | ◇ UNVERIFIED |
| NPNiche Polymer LLC | Ravenswood | WV | — | ◇ UNVERIFIED |
| NPNickelson Plastics INC | Johnson City | TN | — | ◇ UNVERIFIED |
| NCNippon Carbide Industries | Greenville | SC | — | ◇ UNVERIFIED |
| NPNippon Paint Automotive Americas (npaa) | Hobart | IN | — | ◇ UNVERIFIED |
| NSNjdep @ Syncon Resins INC | Kearny | NJ | — | ◇ UNVERIFIED |
| NANorth American Paint Corporation | Ocean | NJ | — | ◇ UNVERIFIED |
| NANorth American Polymer Company LTD | Skokie | IL | — | ◇ UNVERIFIED |
| NCNorth Charleston Distribution Terminal | Charleston | WV | — | ◇ UNVERIFIED |
| NINorthern Industries | Coventry | RI | — | ◇ UNVERIFIED |
| NCNorthrup-grumman CORP Michoud Assembly Facility La | New Orleans | LA | — | ◇ UNVERIFIED |
| NPNorthwestern Plating Works | Chicago | IL | — | ◇ UNVERIFIED |
| NCNottingham Company | Atlanta | GA | — | ◇ UNVERIFIED |
| NFNouryon Functional Chemicals Burt Plant | Burt | NY | — | ◇ UNVERIFIED |
| NPNouryon Pulp & Performance Chemicals | Duluth | GA | — | ◇ UNVERIFIED |
| NCNovachem Corporation | High Point | NC | — | ◇ UNVERIFIED |
| NCNova Chemicals | Channahon | IL | — | ◇ UNVERIFIED |
| NCNova Chemicals INC | Indian Orchard | MA | — | ◇ UNVERIFIED |
| NCNova Chemicals INC | Belpre | OH | — | ◇ UNVERIFIED |
| NCNovacor Chemical INC | Leominster | MA | — | ◇ UNVERIFIED |
