| IRIndependent Refining CO Llc/exeter | Pittston | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| JBJanssen Biotech INC | Malvern | PA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| KMKinder Morgan Arrow Terminal | Industry | PA | Chemical Manufacturing325188 | — | ◐ LIKELY ACTIVE |
| KCKl Chempak, INC. | Lester | PA | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| KIKoppers INC | Clairton | PA | Chemical Manufacturing325194 | — | ◐ LIKELY ACTIVE |
| LCLanxess CORP | Burgettstown | PA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| LLLinde Llc/butler Plt | Butler | PA | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| LMLockheed Martin Comm Space Sys Lmcss | Newtown | PA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| LCLord CORP. Industrial Products | Cambridge Springs | PA | Chemical Manufacturing325314 | — | ◐ LIKELY ACTIVE |
| MEMaintenance Equipment & Chemicals INC | Nanty Glo | PA | Chemical Manufacturing325611 | — | ◐ LIKELY ACTIVE |
| MHMasonic Homes/elizabethtown | Elizabethtown | PA | Chemical Manufacturing325200 | — | ◐ LIKELY ACTIVE |
| MCMayflower Clnr/bensalem | Bensalem | PA | Chemical Manufacturing325188 | — | ◐ LIKELY ACTIVE |
| NINetzsch INC | Exton | PA | Chemical Manufacturing325320 | — | ◐ LIKELY ACTIVE |
| PPPrecision Polymer Prod/pottstown | Pottstown | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| RLRadienz Living | Pittston | PA | Chemical Manufacturing325612 | — | ◐ LIKELY ACTIVE |
| REReliant Energy Warren Station | Warren | PA | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| RHRohm & Haas Co/bristol | Bristol | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| RHRohm & Haas Company | Philadelphia | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| SCSanyo Chem & Resin Inc/jefferson Site | West Elizabeth | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| SWSherwin Williams Mfg Co/lebanon Plt | Lebanon | PA | Chemical Manufacturing325311 | — | ◐ LIKELY ACTIVE |
| SBSmithkline Beecham Pharmaceuticals INC | King of Prussia | PA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| SAStraight Arrow Products, INC | Bethlehem | PA | Chemical Manufacturing325611 | — | ◐ LIKELY ACTIVE |
| TBTetlp - Bechtelsville | Barto | PA | Chemical Manufacturing325910 | — | ◐ LIKELY ACTIVE |
| TFTredegar Film Prod Inc/pottsville | Mar Lin | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| UPUltra Poly CORP - Portland | Portland | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| URUnion Roto-graving/quakertown | Quakertown | PA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| UCUnited Color Manufacturing INC | Philadelphia | PA | Chemical Manufacturing325132 | — | ◐ LIKELY ACTIVE |
| WPWashington Penn Plas/v-bat | Washington | PA | Chemical Manufacturing325991 | — | ◐ LIKELY ACTIVE |
| WRW R Meadows of Pennsylvania | York | PA | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
| ZFZambelli Fireworks Mfg CO | Edinburg | PA | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| AIAccupac, INC. | Lansdale | PA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| ATAdvanced Therapies, LLC | Philadelphia | PA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| AIAffival INC | Oakmont | PA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| ATAgraco Technologies International | Dillsburg | PA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| ALAir Liquide Advanced Materials | Mount Bethel | PA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| ALAir Liquide America CORP Coatesville Asu | Coatesville | PA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| APAir Prod & Chem | Morrisville | PA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| APAir Products and Chemicals, INC. | Creighton | PA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| APAir Products Ecd | Easton | PA | Chemical Manufacturing325188 | — | ◇ UNVERIFIED |
| ACAllegheny Chemical CORP | Ridgway | PA | Chemical Manufacturing325100 | — | ◇ UNVERIFIED |
| AHAmer Heterocyclic Research | Bradford | PA | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
| AIAmerican Iron Oxide CO - Allenport Facility | Allenport | PA | Chemical Manufacturing325130 | — | ◇ UNVERIFIED |
| AVAmer Video Glass Co/mt Pleasant Plt | Mount Pleasant | PA | Chemical Manufacturing325193 | — | ◇ UNVERIFIED |
| ASAm Stabilizers | Franklin | PA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| AIAnzon INC | Philadelphia | PA | Chemical Manufacturing325188 | — | ◇ UNVERIFIED |
| APApozeal Pharm INC | Levittown | PA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| AIApter Industries | Mckeesport | PA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| ACAqua Chemical Supply, INC | Millersburg | PA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| AMAtomized Materials CO INC | Mc Donald | PA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| AFAvtex Fibers CO | Lewistown | PA | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |