| SIServsteel Inc/morgan | Morgan | — | ◇ UNVERIFIED |
| SCSharon Concrete Batch Plt | Sharon | — | ◇ UNVERIFIED |
| SSSheridan Supply CO - Newmanstown | Newmanstown | — | ◇ UNVERIFIED |
| SDShermans Dale Station | Shermans Dale | — | ◇ UNVERIFIED |
| SCSpang & Co/magnetics Div | Butler | — | ◇ UNVERIFIED |
| SISpinworks International CORP | North East | — | ◇ UNVERIFIED |
| SBStandard Bent Glass | East Butler | — | ◇ UNVERIFIED |
| SCStone & CO Masontown Plt | Masontown | — | ◇ UNVERIFIED |
| SDStone Depot/opern Burning/hilltown Twp | Perkasie | — | ◇ UNVERIFIED |
| SWSuperior Well Svc Blacklick Fac | Black Lick | — | ◇ UNVERIFIED |
| SSSusquehanna Supply C/williamsport Plt | Williamsport | — | ◇ UNVERIFIED |
| TBTecho Bloc Corp/plainfield Twp | Pen Argyl | — | ◇ UNVERIFIED |
| TCTemporary Concrete Batch Plt | Midland Borough | — | ◇ UNVERIFIED |
| THTerre Hill Concrete Prod Plant 2 | East Earl | — | ◇ UNVERIFIED |
| THTerre Hill Concrete /terre Hill | Terre Hill | — | ◇ UNVERIFIED |
| TPTetlp - Per. Suct. Loop Terminal P-j | East Waterford | — | ◇ UNVERIFIED |
| TOTherm O Rock East Inc/donora Plt 2 | Donora | — | ◇ UNVERIFIED |
| TITms Intl Llc/park Hill Slag Bank | Johnstown | — | ◇ UNVERIFIED |
| TITrenwyth Industries - Trendstone Plant | Emigsville | — | ◇ UNVERIFIED |
| TGTrulite Glass & Aluminum Solutions | Cheswick | — | ◇ UNVERIFIED |
| USUnited Stone Veneer Stormwater | Middleburg | — | ◇ UNVERIFIED |
| VCVictaulic CO Amer/palmer Plt | Easton | — | ◇ UNVERIFIED |
| VFVitro Flat Glass, LLC / Glass Business & Discovery Center | Pittsburgh | — | ◇ UNVERIFIED |
| WDWaylite Div Ims/bethlehem | Bethlehem | — | ◇ UNVERIFIED |
| WCWolyniec Const INC Stormwater | Williamsport | — | ◇ UNVERIFIED |
| YBYork Bldg Prod Loucks Mill Road Block Plant | York | — | ◇ UNVERIFIED |
| YBYork Building Products - New Holland Plant | New Holland | — | ◇ UNVERIFIED |
Aero Aggregates of North America | Eddystone | 20–99 | ◐ LIKELY ACTIVE |
| ARAllentown RMC Plant | Allentown | 1–19 | ◐ LIKELY ACTIVE |
| AAlloy | Springdale | 1–19 | ◐ LIKELY ACTIVE |
| ABAPG- Bristol | Bristol | 20–99 | ◐ LIKELY ACTIVE |
| AFAPG- Fredonia | Fredonia | 20–99 | ◐ LIKELY ACTIVE |
| ASArch Street | Connellsville | 1–19 | ◐ LIKELY ACTIVE |
| ALArdex, L.P. Corporate Office | Aliquippa | 100–499 | ◐ LIKELY ACTIVE |
| ASArmina Stone | Cheswick | 100–499 | ◐ LIKELY ACTIVE |
| ANASA Newport | Seven Fields | 20–99 | ◐ LIKELY ACTIVE |
| ARAshcom RMC Plant | Everett | 1–19 | ◐ LIKELY ACTIVE |
| ASAssured Solutions LLC | Philadelphia | — | ◐ LIKELY ACTIVE |
| BBBeavertown Block McKee, Pennsylvania | East Freedom | 1–19 | ◐ LIKELY ACTIVE |
| BBBeavertown Block Middleburg Pennsylvania | Middleburg | 20–99 | ◐ LIKELY ACTIVE |
| BSBeyer Studio, Inc. | Philadelphia | 20–99 | ◐ LIKELY ACTIVE |
| BBlock | Springdale | 1–19 | ◐ LIKELY ACTIVE |
| BMBNZ Materials Inc | Zelienople | 20–99 | ◐ LIKELY ACTIVE |
| BMBPI Minerals, New Castle Facility | New Castle | 20–99 | ◐ LIKELY ACTIVE |
| BPBrayman Precast | Saxonburg | 20–99 | ◐ LIKELY ACTIVE |
| BButler | Seven Fields | 20–99 | ◐ LIKELY ACTIVE |
| CCanonsburg | Canonsburg | 1–19 | ◐ LIKELY ACTIVE |
| CCCardinal CT | Easton | 20–99 | ◐ LIKELY ACTIVE |
| CBCastle Builders Supply & Trucking, LLC | New Galilee | 20–99 | ◐ LIKELY ACTIVE |
| CRChambersburg RMC | Chambersburg | 1–19 | ◐ LIKELY ACTIVE |