| ADHESIVES RESEARCH INC/GLEN ROCK | Major source | Yes |
| ADVANSIX (FORMERLY HONEYWELL/FRANKFORD PLT) | Major source | Yes |
| AHF LLC D/B/A AHF PROD/BEECH CREEK PLT | Major source | No |
| AKJ STEEL INDUSTRIES, INC. | Major source | No |
| ALLEGHENY CNTY SANI AUTH/ALLEGHENY CNTY | Major source | No |
| ALLEGHENY ENERGY SUPPLY/SPRINGDALE | Major source | No |
| ALLEGHENY LUDLUM LLC/BRACKENRIDGE | Major source | No |
| ALLEIMA PRECISION TUBE LLC/SCOTTDALE PLT | Major source | No |
| ALLIANCE SANI LANDFILL INC/TAYLOR LDFL | Major source | No |
| ALLIED WASTE SVC OF PA/MSW LDFL | Major source | No |
| ALTA PERFORMANCE MATERIALS US, LLC | Major source | No |
| ALTOONA TERM DE LLC/ALTOONA | Major source | No |
| ALTUGLAS LLC/BRISTOL TWP | Major source | No |
| AMCOR FLEXIBLES NORTH AMER INC/HAZLETON | Major source | No |
| AMCOR FLEXIBLES NORTH AMER INC/LEBANON | Major source | No |
| AMER METAL RECYCLING LLC/ELLWOOD CITY | Major source | Yes |
| AMER REF GROUP/BRADFORD | Major source | No |
| AMERICAN CRAFT BREWERY LLC/BREINIGSVILLE | Major source | No |
| AMES TRUE TEMPER INC/HARRISBURG | Major source | No |
| AMRIZE BUILDING ENVELOPE LLC/YOUNGWOOD PLT | Major source | No |
| AMRIZE CEMENT INC/WHITEHALL PLT | Major source | Yes |
| AQUATIC CO/W DONEGAL TWP | Major source | No |
| ARCONIC US LLC/LANCASTER | Major source | Yes |
| ARDAGH GLASS INC/PORT ALLEGANY PLT | Major source | Yes |
| ARDEN LDFL/CHARTIERS TWP | Major source | No |
| ARKEMA INC/WEST CHESTER | Major source | Yes |
| ARMSTRONG CEMENT & SUPPLY/WINFIELD | Major source | Yes |
| ARMSTRONG POWER/S BEND | Major source | No |
| ARMSTRONG WORLD IND INC/MARIETTA CEILING PLT | Major source | No |
| ASC ENGINEERED SOLUTIONS LLC/COLUMBIA FKA ANVIL | Major source | No |
| ASSAI ENERGY LLC - KEYSTONE LANDFILL SITE | Major source | No |
| ATI FLAT ROLLED PROD HOLDINGS LLC/LATROBE | Major source | No |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC/VANDERGRIFT | Major source | No |
| AVERY DENNISON CORP/QUAKERTOWN | Major source | No |
| BAE SYS LAND & ARMAMENTS LP/YORK | Major source | No |
| BALL METAL BEVERAGE CONTAINER CORP/PITTSTON | Major source | No |
| BASF CORP/MONACA PLT | Major source | Yes |
| BEDFORD REINFORCED PLASTICS LLC/BEDFORD PLT | Major source | No |
| BEDFORD TECH PROD LLC/BEDFORD | Major source | Yes |
| BEFESA ZINC US INC./PALMERTON | Major source | Yes |
| BELLEFIELD BOILER PLT/PGH | Major source | No |
| BETHLEHEM LD/BETHLEHEM FACILITY | Major source | No |
| BIRDSBORO POWER LLC/BIRDSBORO POWER PROJECT | Major source | No |
| BLOMMER CHOCOLATE CO/E GREENVILLE PLT | Major source | No |
| BLUE RIDGE LDFL CO/BLUE RIDGE LDFL | Major source | No |
| BNZ MATERIALS INC/ZELIENOPLE | Major source | No |
| BOEING CO PHILA/RIDLEY PARK PA FAC | Major source | Yes |
| BRASKEM AMER INC/MARCUS HOOK | Major source | No |
| BRIGHTSMITH LLC/FALLS TWP | Major source | No |
| BRUNNER ISLAND LLC/BRUNNER ISLAND | Major source | No |
| BUCK CO LLC/QUARRYVILLE | Major source | Yes |
| BUCKEYE ENERGY SVC LLC/MACUNGIE TERMINAL | Major source | No |
| BUCKEYE PIPE LINE CO/CORAOPOLIS | Major source | No |
| BUCKEYE PIPE LINE CO/MACUNGIE STA | Major source | No |
| BUCKEYE PIPE LINE/MALVERN STA | Major source | No |
| BUCKEYE TERM LLC/MALVERN TERM | Major source | No |
| BUCKEYE TERMINALS LLC/MACUNGIE TERMINAL | Major source | No |
| BVPV STYRENICS LLC/BEAVER | Major source | No |
| CALPINE BETHLEHEM LLC/BETHLEHEM | Major source | Yes |
| CALPINE MID MERIT II LLC/ YORK ENERGY CENTER BLOCK 2 | Major source | Yes |
| CALPINE MID MERIT LLC/YORK ENERGY CTR DELTA BLOCK 1 | Major source | No |
| CALUMET KARNS CITY REF LLC/KARNS CITY | Major source | No |
| CARLISLE CONST MATLS/HUNTER PANEL PLT | Major source | Yes |
| CARMEUSE LIME INC/MILLARD LIME PLT | Major source | No |
| CARPENTER CO./UPPER MACUNGIE | Major source | No |
| CARPENTER TECH CORP/READING PLT | Major source | No |
| CASELLA WASTE MGMT OF PA INC/MCKEAN CNTY LDFL | Major source | No |
| CF MARTIN & CO INC/UPPER NAZARETH | Major source | No |
| CHAMBERS DEV CO INC/MONROEVILLE | Major source | No |
| CHAMBERSBURG ENERGY LLC/CHAMBERSBURG | Major source | No |
| CHANCE ALUM CORP/WILLIAMSPORT PLT | Major source | No |
| CHEROKEE PHARM LLC/RIVERSIDE BORO PLT | Major source | Yes |
| CHESTER CNTY SOLID WASTE AUTH/LANCHESTER LANDFILL | Major source | No |
| CHESTNUT VALLEY LDFL LLC/GERMAN TWP | Major source | Yes |
| CHILDRENS HOSP OF PHILA/ PHILA | Major source | No |
| CHRIN BROS SANI LDFL/CHRIN LDFL | Major source | No |
| CLARION BATHWARE/MARBLE | Major source | Yes |
| CLARION BOARDS/CLARION PLT | Major source | No |
| CLEMENS FOOD GROUP LLC/HATFIELD PLT | Major source | Yes |
| CLEVELAND CLIFFS MONESSEN COKE LLC/MONESSEN COKE PLT | Major source | Yes |
| CLEVELAND CLIFFS PLATE/COATESVILLE | Major source | No |
| CLEVELAND CLIFFS STEEL CORP/ BUTLER WORKS | Major source | No |
| CLEVELAND CLIFFS STEELTON LLC/STEELTON | Major source | No |
| CLINTON CNTY SOLID W/WAYNE TWP LDFL | Major source | No |
| CNH IND AMERICA LLC/NEW HOLLAND | Major source | No |
| COLLEGEVILLE HOLDINGS LLC/COLLEGEVILLE | Major source | No |
| COLUMBIA GAS TRANS CORP/GETTYSBURG COMP STA | Major source | No |
| COLUMBIA GAS TRANS CORP/GREENCASTLE | Major source | No |
| COLUMBIA GAS TRANS CORP/RENOVO STA | Major source | No |
| COLUMBIA GAS TRANS LLC/ARTEMAS COMP STA | Major source | No |
| COMM REFUSE SVC INC/CUMBERLAND CNTY LDFL | Major source | No |
| COMMONWEALTH ENV SYS/FOSTER TWP | Major source | No |
| CONESTOGA WOOD SPECIALTIES/EAST EARL | Major source | No |
| CONSOL PA COAL CO LLC/BAILEY PREP PLT | Major source | Yes |
| CONSTELLATION ENER GENERATION CO/LIMERICK GENERATING STATION | Major source | No |
| CONSTELLATION ENERGY GENERATING STA/ CHESTER | Major source | No |
| CONSTELLATION ENERGY GENERATION CO/FALLS TWP PEAK PWR PLT | Major source | No |
| CONSTELLATION ENERGY GENERATION LLC/CROYDON GEN STA | Major source | No |
| CONSTELLATION ENERGY GENERATION LLC/EDDYSTONE | Major source | No |
| CONSTELLATION GENERATING CO/RICHMOND | Major source | No |
