| EDEi Detection & Imaging Systems | Saxonburg, PA | Computer and Electronic Product Manufacturing334519 | — | ◇ UNVERIFIED |
| EIEljer Inc/ford City Plt | Ford City, PA | Nonmetallic Mineral Product Manufacturing327110 | — | ◇ UNVERIFIED |
| ECEllwood City Forge - X Plant | Ellwood City, PA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| EREllwood Remelt Steel Proposed Var/esr Facility | New Castle, City of, PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| EMEpic Metals Corp/rankin | Rankin, PA | Nonmetallic Mineral Product Manufacturing327993 | — | ◇ UNVERIFIED |
| ECEsquire Clnr/latrobe | Latrobe, PA | Computer and Electronic Product Manufacturing334600 | — | ◇ UNVERIFIED |
| ECEssroc Cement CORP | Bessemer, PA | Textile Mills313240 | — | ◇ UNVERIFIED |
| EMEssroc - Mcquiston Plt | Bessemer, PA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| EWEvoqua Water Technologies | Pittsburgh, PA | Machinery Manufacturing333318 | — | ◇ UNVERIFIED |
| EExide/gnb | Belle Vernon, PA | Electrical Equipment, Appliance & Component Manufacturing335911 | — | ◇ UNVERIFIED |
| EBExxon Bakerstown Grease Plant | Gibsonia, PA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| ECExxon Company USA Pittsburgh Plant | Pittsburgh, PA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| FPFalcon Plastics Washington Fac | Washington, PA | Plastics and Rubber Products Manufacturing326121 | — | ◇ UNVERIFIED |
| FLFb Leopold Co/zelienople | Zelienople, PA | Plastics and Rubber Products Manufacturing326121 | — | ◇ UNVERIFIED |
| FPFerguson Perforating CO INC | New Castle, PA | Fabricated Metal Product Manufacturing332119 | — | ◇ UNVERIFIED |
| FCFerro Color & Glass Corp/washington | Washington, PA | Chemical Manufacturing325130 | — | ◇ UNVERIFIED |
| FGFerro Glass & Color CORP | Washington, PA | Chemical Manufacturing325130 | — | ◇ UNVERIFIED |
| FIFilmtronics INC | Butler, PA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| FSFisher Scientific | Pittsburgh, PA | Machinery Manufacturing333314 | — | ◇ UNVERIFIED |
| FWFolia Water, INC | Pittsburgh, PA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| FIForum, INC. | Pittsburgh, PA | Electrical Equipment, Appliance & Component Manufacturing335132 | — | ◇ UNVERIFIED |
| FIFoseco INC Mount Braddock Facility | Mount Braddock, PA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| FTFuzion Tech/freeport Brick Div | Freeport, PA | Chemical Manufacturing325194 | — | ◇ UNVERIFIED |
| FTFuzion Tech/kittanning Brick Div | Adrian, PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| GIGa Ind | Cranberry Township, PA | Fabricated Metal Product Manufacturing332919 | — | ◇ UNVERIFIED |
| GIGa Industries, Mars Facility Stormwater | Mars, PA | Fabricated Metal Product Manufacturing332996 | — | ◇ UNVERIFIED |
| GCGe CO Bridgeville Glass Plant | Bridgeville, PA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| GAGeneral Alloys Santoro Metals | Washington, PA | Machinery Manufacturing333994 | — | ◇ UNVERIFIED |
| GSGeneral Shale Brick INC Plant # 39 | Darlington, PA | Nonmetallic Mineral Product Manufacturing327121 | — | ◇ UNVERIFIED |
| GMGerome Manufacturing CO INC | Uniontown, PA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| GSGlacial Sand & Gravel/tarrtown Land Plt | Adrian, PA | Petroleum and Coal Products Manufacturing324199 | — | ◇ UNVERIFIED |
| GBGlass Beads CO | Latrobe, PA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| GPGm Pittsburgh Metal Stamping Plant | West Mifflin, PA | Fabricated Metal Product Manufacturing332119 | — | ◇ UNVERIFIED |
| GTGordon Term Svc | Mc Kees Rocks, PA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| GIGottlieb INC | Neville Island, PA | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| GCGraphic Controls_corp | Wilmerding, PA | Paper Manufacturing322222 | — | ◇ UNVERIFIED |
| GIGuardian Ind Corp/jefferson Hills | Clairton, PA | Nonmetallic Mineral Product Manufacturing327211 | — | ◇ UNVERIFIED |
| HIHall Industries INC. | Pittsburgh, PA | Fabricated Metal Product Manufacturing332721 | — | ◇ UNVERIFIED |
| HIHanlon-gregory Industries | Pittsburgh, PA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| HAHanson Aggregates Bmc Sewickley Creek Plt | Sewickley, PA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| HAHanson Aggregates Bmc/whitney Quarry | Latrobe, PA | Machinery Manufacturing333611 | — | ◇ UNVERIFIED |
| HPHarmar Plt | Cheswick, PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| HCHarmony Cleaners & Alterations | Harmony, PA | Machinery Manufacturing333318 | — | ◇ UNVERIFIED |
| HMHarsco Metals - Natrona Facility - Gate 10 | Natrona Heights, PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| HPHeckett Plant #21 | Natrona Heights, PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| HCHeekin Can Incorporated | Pittsburgh, PA | Fabricated Metal Product Manufacturing332431 | — | ◇ UNVERIFIED |
| HEHeraeus Electro Nite | Ellwood City, PA | Computer and Electronic Product Manufacturing334513 | — | ◇ UNVERIFIED |
| HCHerr-voss Corporation-office Basement | Callery, PA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
 Hitachi Energy Usa, INC. | Mount Pleasant, PA | Electrical Equipment, Appliance & Component Manufacturing335313 | — | ◇ UNVERIFIED |
| HMHoltec Manufacturing | Turtle Creek, PA | Fabricated Metal Product Manufacturing332420 | — | ◇ UNVERIFIED |
