| MAMedford Air Tanker Base | Medford | OR | — | ◇ UNVERIFIED |
| MCMetal Chem INC | Greenville | SC | — | ◇ UNVERIFIED |
| MRMetallic Resources INC | Twinsburg | OH | — | ◇ UNVERIFIED |
 Metalor Technologies USA | Attleboro | MA | — | ◇ UNVERIFIED |
| MAMetton America La Porte Plant | La Porte | TX | — | ◇ UNVERIFIED |
| MSMexichem Specialty Compounds INC | Leominster | MA | — | ◇ UNVERIFIED |
 Mfg Chemical, INC. - Callahan Plant | Dalton | GA | — | ◇ UNVERIFIED |
| Mfg Chemical Incorporated | Dalton | GA | — | ◇ UNVERIFIED |
| MMMicromax Microcircuits Industries LTD | Manati | PR | — | ◇ UNVERIFIED |
| MIMilacron INC Consumable Prods Div | Cincinnati | OH | — | ◇ UNVERIFIED |
| MPMoc Products Company INC | Pacoima | CA | — | ◇ UNVERIFIED |
| MSMomentive Specialty Chemicals INC | Springfield | OR | — | ◇ UNVERIFIED |
| MSMomentive Specialty Chemicals Inc.- Baytown Tx | Baytown | TX | — | ◇ UNVERIFIED |
| MBMont Belvieu South Rail Terminal | Baytown | TX | — | ◇ UNVERIFIED |
| MIMorgan INC | Enterprise | AL | — | ◇ UNVERIFIED |
| NCNalco CO LLC | Carson | CA | — | ◇ UNVERIFIED |
| NENalco Exxon Energy Chemical Scott Blend Plant | Scott | LA | — | ◇ UNVERIFIED |
| NTNanophase Technologies CORP | Romeoville | IL | — | ◇ UNVERIFIED |
| NNeoresins | Frankfort | IN | — | ◇ UNVERIFIED |
| NTNew Technology Steel | Erie | MI | — | ◇ UNVERIFIED |
| NCNissan Chemical America Pasadena Plant | Pasadena | TX | — | ◇ UNVERIFIED |
| NINorac INC | Helena | AR | — | ◇ UNVERIFIED |
| NINorth Industrial Chemicals INC | York | PA | — | ◇ UNVERIFIED |
| NRNorth Regional Treatment Plant | Beaumont | TX | — | ◇ UNVERIFIED |
| NRNova Recovery Oz Holdings, LLC | Sumter | SC | — | ◇ UNVERIFIED |
| NLNovastar LP | Midland | TX | — | ◇ UNVERIFIED |
| NNoveon | Leominster | MA | — | ◇ UNVERIFIED |
| O3O-cel-o, 3m Company | Tonawanda | NY | — | ◇ UNVERIFIED |
| OBOld Bridge Chemiacls INC | Old Bridge | NJ | — | ◇ UNVERIFIED |
| ONOndeo Nalco Energy Services Plant 114 | Odessa | TX | — | ◇ UNVERIFIED |
| OSOsram Sylvania Products INC. - Warren, Pa | Warren | PA | — | ◇ UNVERIFIED |
| OPOxiteno Pasadena Plant | Pasadena | TX | — | ◇ UNVERIFIED |
| PBPacific Biodiesel | Keaau | HI | — | ◇ UNVERIFIED |
| PCPalm Commodities International | La Vergne | TN | — | ◇ UNVERIFIED |
| PCPeninsula Copper Industries INC | Hubbell | MI | — | ◇ UNVERIFIED |
| PMPeterson Manufacturing and Engineering Facility | Fort Smith | AR | — | ◇ UNVERIFIED |
| PAPioneer Americas LLC Dba Olin Chlor Alkali Products | Henderson | NV | — | ◇ UNVERIFIED |
| PAPioneer Americas LLC (dba Olin Chlor Alkali Products Sfs) | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| PFPlant Food Mfg | Cranbury | NJ | — | ◇ UNVERIFIED |
| PWPlaskolite West Incorporated | Compton | CA | — | ◇ UNVERIFIED |
| PCPolymer Chemistry Chocolate Bayou LLC | Alvin | TX | — | ◇ UNVERIFIED |
| POPoly One CORP | Seabrook | TX | — | ◇ UNVERIFIED |
| PCPolyone CORP | Norwalk | OH | — | ◇ UNVERIFIED |
| PCPolyone Corporation | Henry | IL | — | ◇ UNVERIFIED |
| PLPolystar, LLC | Dalton | GA | — | ◇ UNVERIFIED |
 Polytek Development CORP. | Franklin | IN | — | ◇ UNVERIFIED |
| PLPolyventive, LLC | Dalton | GA | — | ◇ UNVERIFIED |
| POPosco (printers Oil Supply Co) | Wilmington | MA | — | ◇ UNVERIFIED |
| PPowerlab | Terrell | TX | — | ◇ UNVERIFIED |
| PFPremier Foam INC | Newnan | GA | — | ◇ UNVERIFIED |
