| MOMobil Oil Plano | Plano | TX | — | ◇ UNVERIFIED |
| MWModern Waste Solutions, INC. | Sacramento | CA | — | ◇ UNVERIFIED |
| MFMohawk Finishing Products Site Former-rpm | Amsterdam | NY | — | ◇ UNVERIFIED |
| MGMolecular Glasses inc. | Rochester | NY | — | ◇ UNVERIFIED |
 Molecular Products, INC | Boulder | CO | — | ◇ UNVERIFIED |
| MIMoleculax INC | Pasadena | CA | — | ◇ UNVERIFIED |
| MSMomentive Specialty Chemicals INC. | Brady | TX | — | ◇ UNVERIFIED |
| MCMonsanto Chemical Company | Long Beach | CA | — | ◇ UNVERIFIED |
| MCMonson Chemical Distribution | Leominster | MA | — | ◇ UNVERIFIED |
| MBMoon Blue LLC | San Diego | CA | — | ◇ UNVERIFIED |
| MPMortex Products, INC. | Indianapolis | IN | — | ◇ UNVERIFIED |
| MDMorwet Detergent Plant | Fort Worth | TX | — | ◇ UNVERIFIED |
| MCMoss Copy Center | Denver | CO | — | ◇ UNVERIFIED |
| MSMpower Specialty Chemicals | Brookshire | TX | — | ◇ UNVERIFIED |
| MSM & S Recycling, LLC | Bethlehem | PA | — | ◇ UNVERIFIED |
| MIMti Insulated Products, INC. | Fort Wayne | IN | — | ◇ UNVERIFIED |
| MGMulti-chem Gc LLC - New Iberia Chemical Distribution Facility | New Iberia | LA | — | ◇ UNVERIFIED |
| MGMulti-chem Group LLC - Geismar Facility | Geismar | LA | — | ◇ UNVERIFIED |
| MGMulti-chem Group, LLC Rock Springs Facility | Rock Springs | WY | — | ◇ UNVERIFIED |
| MRMultichem Rifle Facility | Rifle | CO | — | ◇ UNVERIFIED |
| MFMultisorb Filtration Group, French Road Facility | Buffalo | NY | — | ◇ UNVERIFIED |
| NCNabr Carbondale LLC | Carbondale | IL | — | ◇ UNVERIFIED |
| NNalco | San Bernardino | CA | — | ◇ UNVERIFIED |
| NANalco an Ecolab Company | Bryan | TX | — | ◇ UNVERIFIED |
| NCNalco Company | Lathrop | CA | — | ◇ UNVERIFIED |
| NCNalco Company | Maiden | NC | — | ◇ UNVERIFIED |
 Nalco Company, Energy Services Division | Evansville | WY | — | ◇ UNVERIFIED |
| NCNalco CO Tulsa Plant 102 | Tulsa | OK | — | ◇ UNVERIFIED |
| NENalco Energy Services LP | Gillette | WY | — | ◇ UNVERIFIED |
| Nalco Production Texarkana | Texarkana | TX | — | ◇ UNVERIFIED |
| NSNanochem Solutions INC | Peru | IL | — | ◇ UNVERIFIED |
| NCNanogram Corporation | Milpitas | CA | — | ◇ UNVERIFIED |
| NDNanogram Devices Corporation | Fremont | CA | — | ◇ UNVERIFIED |
| NNanoh20 | El Segundo | CA | — | ◇ UNVERIFIED |
| NTNanointegris Technologies INC | Menlo Park | CA | — | ◇ UNVERIFIED |
| NINanosyn INC | Santa Rosa | CA | — | ◇ UNVERIFIED |
| NNanosys | Milpitas | CA | — | ◇ UNVERIFIED |
| NMNanotech Metals, INC. | Lakeland | FL | — | ◇ UNVERIFIED |
 National Foam/west Chester | West Chester | PA | — | ◇ UNVERIFIED |
| NRNatural Remedies Consulting | Modesto | CA | — | ◇ UNVERIFIED |
| NINaturemaker INC | Carlsbad | CA | — | ◇ UNVERIFIED |
| NSNaval Support Activity | Mechanicsburg | PA | — | ◇ UNVERIFIED |
| NINcoc INC | Oak Park | MI | — | ◇ UNVERIFIED |
| NCNdk Crystal INC | Belvidere | IL | — | ◇ UNVERIFIED |
| NHNeotiss Hpt INC (formerly Vallourec Heat Exchanger Tubes; Formerly Valtimet, INC | Morristown | TN | — | ◇ UNVERIFIED |
| NANew Age Oils, LLC | Gaffney | SC | — | ◇ UNVERIFIED |
| NDNew Deal Deicing - Denver Plant | Denver | CO | — | ◇ UNVERIFIED |
| NENew Earth Biosciences | Salem | OR | — | ◇ UNVERIFIED |
| NENew England Fertilizer CO | Quincy | MA | — | ◇ UNVERIFIED |
| NLNew Life Solutions, LLC | Ashland | VA | — | ◇ UNVERIFIED |
| NRNew Rule Productions, INC. | Van Nuys | CA | — | ◇ UNVERIFIED |
| NSNew South Chemicals, INC. | Kennesaw | GA | — | ◇ UNVERIFIED |
| NYNew York Solder Co., INC. | Bronx | NY | — | ◇ UNVERIFIED |
| NMNexans Magnet Wire INC | La Grange | KY | — | ◇ UNVERIFIED |
| NLNex-gen LLC | Chavies | KY | — | ◇ UNVERIFIED |
| NMNgk Metals CORP | Reading | PA | — | ◇ UNVERIFIED |
| NPNiche Polymer LLC | Ravenswood | WV | — | ◇ UNVERIFIED |
| NENickel Electric Inc. | Wallkill | NY | — | ◇ UNVERIFIED |
| NHNineteen Holding Company, LLC | Glen Ellyn | IL | — | ◇ UNVERIFIED |
| NHNineteen Holding Company, LLC | Bremen | IN | — | ◇ UNVERIFIED |
| NRNioxin Research Lab INC | Lithia Springs | GA | — | ◇ UNVERIFIED |
| NJN. Jonas & CO. INC. | Bensalem | PA | — | ◇ UNVERIFIED |
| NLNk Labs INC | Tampa | FL | — | ◇ UNVERIFIED |
| N2No. 23 Operations INC | Shasta Lake | CA | — | ◇ UNVERIFIED |
| NMNof Metal Coatings North America INC | New Hudson | MI | — | ◇ UNVERIFIED |
| NFNomadic Frankincense & Myrrh, INC. | Minneapolis | MN | — | ◇ UNVERIFIED |
| NENorcal Engineering INC | San Jose | CA | — | ◇ UNVERIFIED |
| NANorth American Salt CO | Chicago | IL | — | ◇ UNVERIFIED |
| NVNorwalk Village CORP | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| NINorwest Ingredients LLC Royal City | Royal City | WA | — | ◇ UNVERIFIED |
| NCNo-strip Chemical | Commerce City | CO | — | ◇ UNVERIFIED |
| NWNu Wood Design | Lake Forest | CA | — | ◇ UNVERIFIED |
| NLNuzelmeyer LLC | Bear | DE | — | ◇ UNVERIFIED |
| OFOberon Fuels Kershaw Facility | Brawley | CA | — | ◇ UNVERIFIED |
| OCObsidian Chemical Solutions LLC | Midland | TX | — | ◇ UNVERIFIED |
| OIOemeta INC. | Salt Lake City | UT | — | ◇ UNVERIFIED |
| OSOilfield Solutions Midland | Midland | TX | — | ◇ UNVERIFIED |
| O3Olein 3 Green Valley Industrial Park | Yabucoa | PR | — | ◇ UNVERIFIED |
| OCOlin CORP - Moundsville Plant | Moundsville | WV | — | ◇ UNVERIFIED |
| OCOlympic Chemical CORP | Tacoma | WA | — | ◇ UNVERIFIED |
| OEOmg Electronic Chemicals | South Plainfield | NJ | — | ◇ UNVERIFIED |
| OBOmni Bioenergy LLC | Granite City | IL | — | ◇ UNVERIFIED |
| OIOmni Industrial Solutions, INC | Longview | TX | — | ◇ UNVERIFIED |
| OSOmnova Solutions INC. | Akron | OH | — | ◇ UNVERIFIED |
| OSOmnova Solutions INC. - Calhoun Latex Plant | Calhoun | GA | — | ◇ UNVERIFIED |
| OSOmya Specialty Materials | Long Beach | CA | — | ◇ UNVERIFIED |
| ONOndeo Nalco CO | Ellwood City | PA | — | ◇ UNVERIFIED |
| OUOne Up Mfg 3 | Gardena | CA | — | ◇ UNVERIFIED |
| OOnscent/norwood | Norwood | NJ | — | ◇ UNVERIFIED |
| OBOpen Book Extracts | Roxboro | NC | — | ◇ UNVERIFIED |
| ODOpen Door Packaging | Chino | CA | — | ◇ UNVERIFIED |
| OBOregon Basin - Polyacrylamide Plant | Park | WY | — | ◇ UNVERIFIED |
| OGOrica Ground Support | Grand Junction | CO | — | ◇ UNVERIFIED |
| OBOriginal Balboa Caregivers INC | Chatsworth | CA | — | ◇ UNVERIFIED |
| OSOrion Safety Products | Peru | IN | — | ◇ UNVERIFIED |
| OSOsram Sylvania - Closed | Waldoboro | ME | — | ◇ UNVERIFIED |
| OAOxbow Activated Carbon LLC | Emlenton | PA | — | ◇ UNVERIFIED |
| PDPacific Diazo Prods INC Fontana | Fontana | CA | — | ◇ UNVERIFIED |
 Pacific Industrial Development Corporation | Spartanburg | SC | — | ◇ UNVERIFIED |
| PIPanaceanano INC | Pasadena | CA | — | ◇ UNVERIFIED |
