| MDMadison Dry Ice Plant | Madison | MS | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| MBManassas Branch 14 | Manassas | VA | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| MGMarianas Gas CORP | Agat | GU | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| MGMarianas Gas Corporation | Tamuning | GU | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| MMarlborough | Marlborough | MA | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| MHMarlow Heights Branch 02 | Marlow Heights | MD | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| MDMartinez Dry Ice Plant | Martinez | CA | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| MTMcGregor, TX | Mc Gregor | TX | Chemical Manufacturing325120 | 500+ | ◐ LIKELY ACTIVE |
| MTMcGregor, TX | McGregor | TX | Chemical Manufacturing325120 | 500+ | ◐ LIKELY ACTIVE |
| MDMcIntosh Distribution | McIntosh | AL | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| MDMcIntosh Distribution | Mc Intosh | AL | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| MRMcKees Rocks | McKees Rocks | PA | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| MGMedical-technical Gases, INC | North Billerica | MA | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| MGMesser Gas Puerto Rico INC | Catano | PR | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| MFMexichem Fluor St. Gabriel (KLEA) Site | St. Gabriel | LA | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| MBMiami Branch 62 | Miami | FL | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| MPMiami Packaged Gas Plant | Miami | FL | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| MCMid-atlantic Clean Hydrogen Hub, INC. | Dover | DE | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| MBMiddlesex Branch 63 | Middlesex | NJ | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| MMidwest-Waukesha | Waukesha | WI | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| MBMonroe Branch 55 | Monroe | NC | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| MMorgantown | Morgantown | WV | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| MLMoses Lake ASU | Moses Lake | WA | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| NANaes Aces I | Delta | UT | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| NANampa ASU | Nampa | ID | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| NNashville | Antioch | TN | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| NCNational Carbonation | Charlotte | NC | Chemical Manufacturing325120 | 100-499 | ◐ LIKELY ACTIVE |
| NBNew Brighton | New Brighton | PA | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| NJNew Johnsonville Specialty Gas Plant | Waverly | TN | Chemical Manufacturing325120 | 100-499 | ◐ LIKELY ACTIVE |
| NENLC Energy DENW | Denmark | WI | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| NANOC - Ankeny | Ankeny | IA | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| NINorco INC | Boise | ID | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| NANorth American Refrigerants INC | Cedar Grove | WI | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| NCNorth Charleston Branch 48 | North Charleston | SC | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| NHNorth Haven | North Haven | CT | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| NRNorth Royalton | North Royalton | OH | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| ODOLCV-Stratos Direct Air Capture Plant | Notrees | TX | Chemical Manufacturing325120 | 100-499 | ◐ LIKELY ACTIVE |
| OSOrchard Storage Company LLC | Houston | TX | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| OBOrlando Branch 53 | Orlando | FL | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| OBOrlando/Division Branch 66 | Orlando | FL | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| OOtis | Otis | KS | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| OLOXARC LLC Bend | Bend | OR | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| OLOXARC LLC Boise | Boise | ID | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| OLOXARC LLC Broadway | Spokane | WA | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| OLOXARC LLC Coeur D' Alene | Coeur D' Alene | ID | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| OLOXARC LLC Coeur D' Alene | Coeur D Alene | ID | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| OLOXARC LLC Colville | Colville | WA | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| OLOxarc LLC Ellensburg | Ellensburg | WA | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| OLOxarc LLC Gresham | Portland | OR | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| OLOxarc LLC Hermiston | Hermiston | OR | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |