| IWInstitute Wv Facility | Institute | WV | — | ◇ UNVERIFIED |
| ICIntergulf CORP Lonestar Ecology LLC (lonstr) | Pasadena | TX | — | ◇ UNVERIFIED |
| IBInterline Brands Dc - Huntington #4960 | Huntington | WV | — | ◇ UNVERIFIED |
| ICInterplastic CORP | Hawthorne | CA | — | ◇ UNVERIFIED |
| IHIntertrade Holdings, INC. | Copperhill | TN | — | ◇ UNVERIFIED |
| IRIofina Resources, INC. (i011) | Dover | OK | — | ◇ UNVERIFIED |
| IRIofina Resources, INC. (i02) | Alva | OK | — | ◇ UNVERIFIED |
| IRIofina Resources, INC. (io10) | Kingfisher | OK | — | ◇ UNVERIFIED |
| IRIofina Resources, INC. (io4) | Burlington | OK | — | ◇ UNVERIFIED |
| IRIofina Resources, INC. (io5) | Alva | OK | — | ◇ UNVERIFIED |
| IRIofina Resources, INC. (io6) | Alva | OK | — | ◇ UNVERIFIED |
| IRIofina Resources, INC. (io7) | Dacoma | OK | — | ◇ UNVERIFIED |
| IRIofina Resources, INC. (io8) | Arnett | OK | — | ◇ UNVERIFIED |
| IRIofina Resources, INC. (io9) | Kingfisher | OK | — | ◇ UNVERIFIED |
| JEJareson Enterprises Arizona, LLC | Casa Grande | AZ | — | ◇ UNVERIFIED |
| JCJost Chemical | Overland | MO | — | ◇ UNVERIFIED |
| JCJwa Co., LTD. | Kokomo | IN | — | ◇ UNVERIFIED |
| KPK2 Pure Solutions - Pittsburg Plant | Pittsburg | CA | — | ◇ UNVERIFIED |
| KCKeavys Corner LLC | Sebring | FL | — | ◇ UNVERIFIED |
| KPKemiron Pacific INC | Fontana | CA | — | ◇ UNVERIFIED |
| KBKetjen Bayport Plant | Pasadena | TX | — | ◇ UNVERIFIED |
| K1Kre 1221 Broadway Owners LLC | Oakland | CA | — | ◇ UNVERIFIED |
| KAKuraray America, INC | Pasadena | TX | — | ◇ UNVERIFIED |
| LCLab Chocolate Bayou Plant | Alvin | TX | — | ◇ UNVERIFIED |
| LCLanxess CORP @ O'hare Airport Ord 838 | Chicago | IL | — | ◇ UNVERIFIED |
| LOLanxess Oxone Memphis Plant | Memphis | TN | — | ◇ UNVERIFIED |
| LNLi-cycle North America Hub INC | Rochester | NY | — | ◇ UNVERIFIED |
| LTLimtech Technologies, INC. | Nahunta | GA | — | ◇ UNVERIFIED |
| LMLiquid Minerals Group, INC. | New Waverly | TX | — | ◇ UNVERIFIED |
| LTLi Tungsten Superfund Site | Glen Cove | NY | — | ◇ UNVERIFIED |
| LAL.L. Associates, LLC | Daphne | AL | — | ◇ UNVERIFIED |
 Luxfer Magtech Saxonburg Plt | Saxonburg | PA | — | ◇ UNVERIFIED |
| LMLuxfer Mel Technologies Dba Mel Chemical-treatment Plant | Flemington | NJ | — | ◇ UNVERIFIED |
| LPLynx Processing Facility | Robstown | TX | — | ◇ UNVERIFIED |
| MCMacdonald Carbide CO INC | Baldwin Park | CA | — | ◇ UNVERIFIED |
| MIMadison Industries INC | Old Bridge | NJ | — | ◇ UNVERIFIED |
| MCMagnum Colors LLC | Venetia | PA | — | ◇ UNVERIFIED |
| MRMaguire Refining | Minneapolis | MN | — | ◇ UNVERIFIED |
| MLMarathon LLC | Fontana | CA | — | ◇ UNVERIFIED |
| MLMarathon LLC | Martinez | CA | — | ◇ UNVERIFIED |
| MGMaroon Group, LLC | Gardena | CA | — | ◇ UNVERIFIED |
| MBMaster Builders Solutions Construction Systems US | Newark | CA | — | ◇ UNVERIFIED |
| MMaterion | Milwaukee | WI | — | ◇ UNVERIFIED |
| MCM Chemical Manufacturing | Baytown | TX | — | ◇ UNVERIFIED |
| MCMel Chemicals INC | Flemington | NJ | — | ◇ UNVERIFIED |
| MPMemc Pasadena, Incorporated | Pasadena | TX | — | ◇ UNVERIFIED |
| MLMenon Laboratories | Somerville | MA | — | ◇ UNVERIFIED |
| MAMetals and Additives | Brazil | IN | — | ◇ UNVERIFIED |
| MAMetals and Additives LLC Warehouse | Brazil | IN | — | ◇ UNVERIFIED |
| MPMgc Pure Chemicals America INC | Forest Grove | OR | — | ◇ UNVERIFIED |
