| SCSasol Chem USA Llc/oil City | Oil City | PA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| SCScotts Company Potting Soil Facility | Avondale | PA | Chemical Manufacturing325314 | — | ◐ LIKELY ACTIVE |
| SPShawville Power Llc/shawville Gen Sta | Shawville | PA | Chemical Manufacturing325500 | — | ◐ LIKELY ACTIVE |
| SLSigmapharm Laboratories LLC | Bensalem | PA | Chemical Manufacturing325411 | 20-99 | ◐ LIKELY ACTIVE |
| SBSmithkline Beecham Pharmaceuticals INC | King of Prussia | PA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| SCSpecialty Coated Products | Fallsington | PA | Chemical Manufacturing325992 | 1-19 | ◐ LIKELY ACTIVE |
| SPSpray Products | Conshohocken | PA | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| SASuperior Adsorbents Mfg | Emlenton | PA | Chemical Manufacturing325130 | — | ◐ LIKELY ACTIVE |
| SOSynthex Organics, LLC | Altoona | PA | Chemical Manufacturing325998 | 20-99 | ◐ LIKELY ACTIVE |
| TOTherm O Rock INC - New Eagle Plant | New Eagle | PA | Chemical Manufacturing325612 | — | ◐ LIKELY ACTIVE |
| TSThe Scotts Company - Oxford | Oxford | PA | Wood Product Manufacturing321999 | 20-99 | ◐ LIKELY ACTIVE |
| TFTredegar Film Prod Inc/pottsville | Mar Lin | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| ULUct, LLC | Lewistown | PA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| UDUnited-erie Division of Icc, INC | Erie | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| UIUniversal Industrial Gases | Bethlehem | PA | Chemical Manufacturing325120 | 100-499 | ◐ LIKELY ACTIVE |
| WPWashington Penn - Arden | Washington | PA | Chemical Manufacturing325991 | 100-499 | ◐ LIKELY ACTIVE |
| WPWashington Penn Plas/performance Prod Div | Eighty Four | PA | Chemical Manufacturing325991 | — | ◐ LIKELY ACTIVE |
| WPWest Point, PA Facility | West Point | PA | Chemical Manufacturing325412 | 500+ | ◐ LIKELY ACTIVE |
| WMWillert Manufacturing Company, LLC | Douglassville | PA | Chemical Manufacturing325612 | 20-99 | ◐ LIKELY ACTIVE |
| WPWyeth Pharmaceuticals/collegeville | Collegeville | PA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| AAccupac | Souderton | PA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| AAdvansix | Philadelphia | PA | Chemical Manufacturing325110 | — | ◐ LIKELY ACTIVE |
| ARAirgas - Reading | Reading | PA | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| ALAir Liquide Advanced Materials | Mount Bethel | PA | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| ASAlloy Surfaces Aston Plt | Chester | PA | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| ASAm Stabilizers | Franklin | PA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| AAquachempacs | Huntingdon Valley | PA | Chemical Manufacturing325611 | — | ◐ LIKELY ACTIVE |
Aquaphoenix Scientific LLC | Hanover | PA | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| ACAutomotive Coachworks Inc/oxford | Oxford | PA | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| BABethlehem Apparatus CO INC | Bethlehem | PA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| BIBiospectra INC | Stroudsburg | PA | Chemical Manufacturing325411 | — | ◐ LIKELY ACTIVE |
| BKBmr-145 King of Prussia Rd/radnor | Radnor | PA | Chemical Manufacturing325411 | — | ◐ LIKELY ACTIVE |
| BIBoiron INC | Newtown Square | PA | Chemical Manufacturing325411 | 100-499 | ◐ LIKELY ACTIVE |
| BIBuckeye Indianola Terminal | Indianola | PA | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| CMCatalent Micron Technologies Malvern Facility | Malvern | PA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| CPChemstation Pittsburgh | West Newton | PA | Chemical Manufacturing325611 | — | ◐ LIKELY ACTIVE |
| CLCnty Line Clnr Svc | Huntingdon Valley | PA | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| CCCorco Chemical CORP | Fairless Hills | PA | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| CACrazy Aaron Enterprises/norristown | Norristown | PA | Chemical Manufacturing325212 | — | ◐ LIKELY ACTIVE |
| CPCustom Particle Reduction | Plumsteadville | PA | Chemical Manufacturing325998 | 1-19 | ◐ LIKELY ACTIVE |
| DMDupont Marshall Lab | Philadelphia | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| DNDyno Nobel INC (donora Plant) | Donora | PA | Chemical Manufacturing325188 | — | ◐ LIKELY ACTIVE |
| ELEarthcare Llc/bethel | Bethel | PA | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| EGEfc Gases & Advanced Materials | Hatfield | PA | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| FGF Group Nano, LLC | Bellefonte | PA | Chemical Manufacturing325991 | — | ◐ LIKELY ACTIVE |
| FTFiberglass Tech Inc/bristol | Levittown | PA | Chemical Manufacturing325991 | — | ◐ LIKELY ACTIVE |
| FEFluid Energy Proc & Equip Hatfield Plt | Hatfield | PA | Chemical Manufacturing325188 | — | ◐ LIKELY ACTIVE |
| GMGlaxosmithkline/upper Merion East | King of Prussia | PA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| GCGrow Choice Ag INC Dba Brickers Choice Fertilizer | Marion | PA | Chemical Manufacturing325314 | — | ◐ LIKELY ACTIVE |
| HCHydrol Chemical Company | Yeadon | PA | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |