| HKH Krevit & CO Water Treatment Chemicals | New Haven | CT | — | ◇ UNVERIFIED |
| HMHohn Manufacturing INC | Fenton | MO | — | ◇ UNVERIFIED |
 H-o-h Water Technology, INC. | Germantown | WI | — | ◇ UNVERIFIED |
| HCHolland Company Bators Garage | Adams | MA | — | ◇ UNVERIFIED |
| HCHolland Company Garage | North Adams | MA | — | ◇ UNVERIFIED |
| HEHoneywell Electronic Chemicals LLC | Chandler | AZ | — | ◇ UNVERIFIED |
| HIHoneywell, INC. | Arvada | CO | — | ◇ UNVERIFIED |
| HIHoneywell International Inc-claymont | Claymont | DE | — | ◇ UNVERIFIED |
| HPHoneywell Pmt | Baton Rouge | LA | — | ◇ UNVERIFIED |
| HCHopkins Chemical | Rome | GA | — | ◇ UNVERIFIED |
| HWHot Wax Distributors | Stanton | CA | — | ◇ UNVERIFIED |
| HIHoward Industries INC | Columbus | OH | — | ◇ UNVERIFIED |
| HHHpc Holdings, INC | North Augusta | SC | — | ◇ UNVERIFIED |
| HCHuntsman Corporation | Dalton | GA | — | ◇ UNVERIFIED |
| HDHupp Draft Services INC | Chico | CA | — | ◇ UNVERIFIED |
| HAHwtg - Apopka | Apopka | FL | — | ◇ UNVERIFIED |
| HCHydrite Chemical CO | Wausau | WI | — | ◇ UNVERIFIED |
| HCHyperion Catalysis INC | Cambridge | MA | — | ◇ UNVERIFIED |
| INI-5 North On-ramp at Exit 27 | Kalama | WA | — | ◇ UNVERIFIED |
| IAIbc Advanced Technologies, INC. V-1 | Orem | UT | — | ◇ UNVERIFIED |
| IAIbc Advanced Technologies, INC. Vineyard | Vineyard | UT | — | ◇ UNVERIFIED |
| IPIcl Performance Products LP | Carteret | NJ | — | ◇ UNVERIFIED |
| IPIcl Performance Products, LP | Santa Rosa | CA | — | ◇ UNVERIFIED |
| ISIcl Specialty Products INC Carondelet Plant | Saint Louis | MO | — | ◇ UNVERIFIED |
| ITIllinois Tool Works Dba Itw Texwipe | Kernersville | NC | — | ◇ UNVERIFIED |
| ITImage Technology Chemical | Anaheim | CA | — | ◇ UNVERIFIED |
| IPImagination Products Corporation | Chillicothe | IL | — | ◇ UNVERIFIED |
| IPImagination Products Corporation | Chillicothe | IL | — | ◇ UNVERIFIED |
| ICImbicor Corporation | Maumelle | AR | — | ◇ UNVERIFIED |
| ICImerys Carbonates LLC | Sylacauga | AL | — | ◇ UNVERIFIED |
| INImpact Nano LLC | Devens | MA | — | ◇ UNVERIFIED |
| IDImperial Dade | Jessup | MD | — | ◇ UNVERIFIED |
| IMImperial Marble | North Kansas City | MO | — | ◇ UNVERIFIED |
| IMIncident Management Group INC. | Riverside | CA | — | ◇ UNVERIFIED |
| IOIndiana Oxide | Brazil | IN | — | ◇ UNVERIFIED |
| IOIndustrial Opportunities INC. | Kahoka | MO | — | ◇ UNVERIFIED |
| IEInland Environmental | Pasco | WA | — | ◇ UNVERIFIED |
| IIInnophos, INC. | Geismar | LA | — | ◇ UNVERIFIED |
| ICInnovative Chemical Corporation, INC. | Cottage Grove | MN | — | ◇ UNVERIFIED |
| ICInnovative Chemical Technologies, INC. | Augusta | GA | — | ◇ UNVERIFIED |
| IWInnovative Water Care, LLC | Dayton | TN | — | ◇ UNVERIFIED |
| IWInnovative Water Care, LLC Dba Solenis | Charleston | TN | — | ◇ UNVERIFIED |
| IWInstitute Wv Facility | Institute | WV | — | ◇ UNVERIFIED |
| ICIntercem Corporation | Anaheim | CA | — | ◇ UNVERIFIED |
| ICIntergulf CORP Lonestar Ecology LLC (lonstr) | Pasadena | TX | — | ◇ UNVERIFIED |
| ISInterior Specialists, INC. | Sacramento | CA | — | ◇ UNVERIFIED |
| IBInterline Brands Dc - Huntington #4960 | Huntington | WV | — | ◇ UNVERIFIED |
| ICInterplastic CORP | Hawthorne | CA | — | ◇ UNVERIFIED |
| ICInterstate Chemical INC | Lakeland | FL | — | ◇ UNVERIFIED |
| IHIntertrade Holdings, INC. | Copperhill | TN | — | ◇ UNVERIFIED |
