| MFMpc - Fairborn | Fairborn | OH | — | ◇ UNVERIFIED |
| MSMpm Silicones LLC | Friendly | WV | — | ◇ UNVERIFIED |
| MBMsu Bioeconomy Institute | Holland | MI | — | ◇ UNVERIFIED |
| NCNalco Champion | Freeport | TX | — | ◇ UNVERIFIED |
| NCNalco Chemical Company | Bedford Park | IL | — | ◇ UNVERIFIED |
| NCNalco CO - Evansville Plant 108 | Evansville | WY | — | ◇ UNVERIFIED |
| NCNalco CO LLC | Carson | CA | — | ◇ UNVERIFIED |
 Nalco Company LLC | Montgomery | AL | — | ◇ UNVERIFIED |
| NCNalco CO Plant 106 | Sugar Land | TX | — | ◇ UNVERIFIED |
| NENalco Exxon Energy Chemical Scott Blend Plant | Scott | LA | — | ◇ UNVERIFIED |
| Nalco Production LLC - Garyville Facility | Garyville | LA | — | ◇ UNVERIFIED |
| Nalco Production LLC - Nalco Company Port Allen | Port Allen | LA | — | ◇ UNVERIFIED |
| NWNalco Water Fresno Texas Facility | Fresno | TX | — | ◇ UNVERIFIED |
| NTNanophase Technologies CORP | Romeoville | IL | — | ◇ UNVERIFIED |
| NCNapco Chemical Co., INC. | Spring | TX | — | ◇ UNVERIFIED |
| NCNch CORP Mohawk Labs Div | Irving | TX | — | ◇ UNVERIFIED |
| NBNexpera Burnside Plant | Darrow | LA | — | ◇ UNVERIFIED |
| NDNext Diesel | Adrian | MI | — | ◇ UNVERIFIED |
| NCNissan Chemical America Pasadena Plant | Pasadena | TX | — | ◇ UNVERIFIED |
| NNoltex | La Porte | TX | — | ◇ UNVERIFIED |
| NINorac INC | Helena | AR | — | ◇ UNVERIFIED |
| NANoranda Alumina LLC | Gramercy | LA | — | ◇ UNVERIFIED |
| NINorth Industrial Chemicals INC | York | PA | — | ◇ UNVERIFIED |
| NFNouryon Functional Chemicals LLC Battleground | La Porte | TX | — | ◇ UNVERIFIED |
| NCNova Chemicals Olefins LLC - Geismar Ethylene Plant | Geismar | LA | — | ◇ UNVERIFIED |
| NRNova Recovery Oz Holdings, LLC | Sumter | SC | — | ◇ UNVERIFIED |
| NLNovastar LP | Midland | TX | — | ◇ UNVERIFIED |
| NNNovo Nordisk Biochem North America, INC. | Franklinton | NC | — | ◇ UNVERIFIED |
| NANutrien Aurora Facility | Aurora | NC | — | ◇ UNVERIFIED |
| NBNutrition & Biosciences USA 1 LLC - Plaquemine Methocel | Plaquemine | LA | — | ◇ UNVERIFIED |
| NNNyacol Nano Technologies | Ashland | MA | — | ◇ UNVERIFIED |
| OPOak Point Plant | Belle Chasse | LA | — | ◇ UNVERIFIED |
| OCOccidental Chemical Corporation | Convent | LA | — | ◇ UNVERIFIED |
| OCOccidental Chemical Corporation Ashtabula Plant | Ashtabula | OH | — | ◇ UNVERIFIED |
| OCOccidental Chemical Corporation - Geismar Facility | Geismar | LA | — | ◇ UNVERIFIED |
| OCOccidental Chemical Corporation Oxychem | New Johnsonville | TN | — | ◇ UNVERIFIED |
| OCOccidental Chemical CORP Sauget Plant | Sauget | IL | — | ◇ UNVERIFIED |
| OCOccidental Chemical CORP - Taft Plant | Hahnville | LA | — | ◇ UNVERIFIED |
| OBOld Bridge Chemiacls INC | Old Bridge | NJ | — | ◇ UNVERIFIED |
| OBOlin Blue Cube | Freeport | TX | — | ◇ UNVERIFIED |
| OCOlin Chlor Alkali Products | Niagara Falls | NY | — | ◇ UNVERIFIED |
| OCOmega Chemicals INC | Cowpens | SC | — | ◇ UNVERIFIED |
| OOOmni Oxide Indiana Oxide | Brazil | IN | — | ◇ UNVERIFIED |
| ONOndeo Nalco Energy Services Plant 114 | Odessa | TX | — | ◇ UNVERIFIED |
| OPOnline Packaging INC | Plover | WI | — | ◇ UNVERIFIED |
| OCOq Chemicals Bishop LLC | Bishop | TX | — | ◇ UNVERIFIED |
| OCOrtec Clean Room Addition | Piedmont | SC | — | ◇ UNVERIFIED |
| OPOxiteno Pasadena Plant | Pasadena | TX | — | ◇ UNVERIFIED |
| OVOxy Vinyls LP - Deer Park Pvc | Deer Park | TX | — | ◇ UNVERIFIED |
| OVOxy Vinyls, LP - La Porte Vcm Plant | La Porte | TX | — | ◇ UNVERIFIED |
