| MFMultisorb Filtration Group, French Road Facility | Buffalo | NY | — | ◇ UNVERIFIED |
| MIMylec INC | Winchendon | MA | — | ◇ UNVERIFIED |
| NINA Industries Pasadena | Seabrook | TX | — | ◇ UNVERIFIED |
 Nalco Company, Energy Services Division | Evansville | WY | — | ◇ UNVERIFIED |
| NCNalco CO Tulsa Plant 102 | Tulsa | OK | — | ◇ UNVERIFIED |
| NENalco Energy Services LP | Gillette | WY | — | ◇ UNVERIFIED |
| NSNanochem Solutions INC | Peru | IL | — | ◇ UNVERIFIED |
| NNanosys | Milpitas | CA | — | ◇ UNVERIFIED |
| NCNational Casein | Tyler | TX | — | ◇ UNVERIFIED |
 National Foam/west Chester | West Chester | PA | — | ◇ 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 |
| NINcoc INC (national Chemical & Oil CORP ) | Oak Park | MI | — | ◇ UNVERIFIED |
| NSNeel Schaffer Inc, Jitney Jr Number 617 | Tchula | MS | — | ◇ UNVERIFIED |
| NBNelson Biotechnologies INC | Flagstaff | AZ | — | ◇ UNVERIFIED |
| NBNelson Brothers, LLC - Cherokee Facility | Cherokee | AL | — | ◇ UNVERIFIED |
| NCNeville Chemical CO | Anaheim | CA | — | ◇ UNVERIFIED |
| NANewark Armed Forces Reserve Center | Newark | DE | — | ◇ UNVERIFIED |
| NDNew Deal Deicing - Denver Plant | Denver | CO | — | ◇ UNVERIFIED |
| NENew Eden Energy LLC | Saint Cloud | FL | — | ◇ UNVERIFIED |
| NENew England Laminates CO INC | Walden | NY | — | ◇ UNVERIFIED |
| NENew England Plastic | Norton | MA | — | ◇ UNVERIFIED |
| NJNew Jersey Fireworks | Elkton | MD | — | ◇ UNVERIFIED |
| NLNew Life Solutions, LLC | Ashland | VA | — | ◇ UNVERIFIED |
| NMNew Model Cleaners INC. | Boston | MA | — | ◇ UNVERIFIED |
| NPNew Pig CORP | Tipton | PA | — | ◇ UNVERIFIED |
| NLNexair, LLC | Millington | TN | — | ◇ UNVERIFIED |
| NLNex-gen LLC | Chavies | KY | — | ◇ UNVERIFIED |
| NDNext Diesel | Adrian | MI | — | ◇ UNVERIFIED |
| NSNext-gen Supply Group INC | Mansfield | MA | — | ◇ UNVERIFIED |
| NPNiche Polymer LLC | Ravenswood | WV | — | ◇ UNVERIFIED |
| NPNickelson Plastics INC | Johnson City | TN | — | ◇ UNVERIFIED |
| NCNippon Carbide Industries | Greenville | SC | — | ◇ UNVERIFIED |
| NONitrous Oxide CORP | Cantonment | FL | — | ◇ UNVERIFIED |
| NSNjdep @ Syncon Resins INC | Kearny | NJ | — | ◇ UNVERIFIED |
| NINorco INC Boise Acetylene Plant | Boise | ID | — | ◇ UNVERIFIED |
| NCNorphlet Chemical, INC. | Norphlet | AR | — | ◇ UNVERIFIED |
| NANorth American Salt CO | Chicago | IL | — | ◇ UNVERIFIED |
| NCNorth Charleston Distribution Terminal | Charleston | WV | — | ◇ UNVERIFIED |
| NINorthern Industries | Coventry | RI | — | ◇ UNVERIFIED |
| NSNorth St Rose Field Production Facility | Saint Rose | LA | — | ◇ UNVERIFIED |
| NPNorthwestern Plating Works | Chicago | IL | — | ◇ UNVERIFIED |
| NDNotre Dame Investors INC - Jennings Refinery | Jennings | LA | — | ◇ 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 |
| NPNova Pressroom Products | Jacksonville | FL | — | ◇ UNVERIFIED |
| NBNovozymes Biologicals INC - South Broad Street | Salem | VA | — | ◇ UNVERIFIED |
| NINuset Industries, Orrco, 02 Bl (nuseti) | Salt Lake City | UT | — | ◇ UNVERIFIED |
| NBNutrition & Biosciences USA 1, Llc, Midland | Midland | MI | — | ◇ UNVERIFIED |
| NBNutrition & Biosciences USA 1 LLC - Plaquemine Methocel | Plaquemine | LA | — | ◇ UNVERIFIED |
| NWNu Wood Design | Lake Forest | CA | — | ◇ UNVERIFIED |
| OCOakely City | Oakley | UT | — | ◇ UNVERIFIED |
| OFOberon Fuels Kershaw Facility | Brawley | CA | — | ◇ UNVERIFIED |
| OObiter | Champaign | IL | — | ◇ UNVERIFIED |
| OCOccidental Chemical CORP Sauget Plant | Sauget | IL | — | ◇ UNVERIFIED |
| OROcean Reef Pools INC. | Oak Hill | FL | — | ◇ UNVERIFIED |
| OIOctochem INC | Vandalia | IL | — | ◇ UNVERIFIED |
| OIOemeta INC. | Salt Lake City | UT | — | ◇ UNVERIFIED |
| OSOilfield Solutions Midland | Midland | TX | — | ◇ UNVERIFIED |
| OIOkon INC | Lakewood | CO | — | ◇ UNVERIFIED |
| OCOlin CORP - Moundsville Plant | Moundsville | WV | — | ◇ UNVERIFIED |
| OTOmaha Transloading Corporation | Omaha | NE | — | ◇ UNVERIFIED |
| OEOmg Electronic Chemicals | South Plainfield | NJ | — | ◇ UNVERIFIED |
| OSOmnova Solutions, INC. | Dalton | GA | — | ◇ UNVERIFIED |
| OSOmnova Solutions INC. - Calhoun Latex Plant | Calhoun | GA | — | ◇ UNVERIFIED |
| OBOpen Book Extracts | Roxboro | NC | — | ◇ UNVERIFIED |
| OIOptiblend Industries-cambridge | Cambridge | OH | — | ◇ UNVERIFIED |
| OIOptiblend Industries, INC. | Midland | TX | — | ◇ UNVERIFIED |
 Organic Dyes and Pigments | Providence | RI | — | ◇ UNVERIFIED |
| OCOrg Chem Group LLC | Evansville | IN | — | ◇ UNVERIFIED |
| OBOrigin Baltimore Recycling, LLC | Curtis Bay | MD | — | ◇ UNVERIFIED |
| OBOsprey Biotechnics | Sarasota | FL | — | ◇ UNVERIFIED |
| OPOvation Polymers | Medina | OH | — | ◇ UNVERIFIED |
| OPOvation Polymer Technology and Engineered Materials | Medina | OH | — | ◇ UNVERIFIED |
| OBOwen Biosciences INC | Baton Rouge | LA | — | ◇ UNVERIFIED |
| PBPacific Biodiesel INC | Kahului | HI | — | ◇ UNVERIFIED |
| PLPactiv LLC | Bedford Park | IL | — | ◇ UNVERIFIED |
| PPPactiv Packaging INC | Mineral Wells | WV | — | ◇ UNVERIFIED |
| PEPampa Energy Center | Pampa | TX | — | ◇ UNVERIFIED |
| PCParts Cleaning Technologies LLC | Indianapolis | IN | — | ◇ UNVERIFIED |
| PWPar West Refinery | Kapolei | HI | — | ◇ UNVERIFIED |
| PFPeden Facility | Fort Worth | TX | — | ◇ UNVERIFIED |
| PEPe Ell Hulk Hauling | Aberdeen | WA | — | ◇ UNVERIFIED |
| PQPennzoil Quaker State | Rouseville | PA | — | ◇ UNVERIFIED |
| PCPenray Cos INC | Wheeling | IL | — | ◇ UNVERIFIED |
| POPerma-fix of South Georgia | Valdosta | GA | — | ◇ UNVERIFIED |
| PDPermuthane Div of Stahl USA | Peabody | MA | — | ◇ UNVERIFIED |
| PMPetersen Molding Corporation | Norwalk | CA | — | ◇ UNVERIFIED |
| PSPeterson Sys Intl | Duarte | CA | — | ◇ UNVERIFIED |
| PRPetra Research INC | Alachua | FL | — | ◇ UNVERIFIED |
| PCPetromax Carnegie Plt | Carnegie | PA | — | ◇ UNVERIFIED |
| PSPetro Star INC Valdez Refinery | Valdez | AK | — | ◇ UNVERIFIED |
