Quick Crete Products Corporation | Norco | 100–499 | ● ACTIVE |
| TSThermal Structures, INC | Corona | 100–499 | ● ACTIVE |
Celebration Cellars LLC | Murrieta | — | ● ACTIVE |
Acker Stone Industries, INC | Corona | — | ◐ LIKELY ACTIVE |
| CPCabazon Plant 11 | Cabazon | 1–19 | ◐ LIKELY ACTIVE |
| CPCorona Plant 30 | Corona | 20–99 | ◐ LIKELY ACTIVE |
| MPMurrieta Plant 27 | Murrieta | 20–99 | ◐ LIKELY ACTIVE |
| QCQuikrete - Corona, Ca Plant | Corona | 100–499 | ◐ LIKELY ACTIVE |
| RPRiverside Plant 1 | Riverside | 20–99 | ◐ LIKELY ACTIVE |
| SCSun City Plant 8 | Sun City | 20–99 | ◐ LIKELY ACTIVE |
| TPThousand Palms Plant 26 | Thousand Palms | 1–19 | ◐ LIKELY ACTIVE |
| USUnited States Tile CO Corona | Corona | — | ◐ LIKELY ACTIVE |
| CCCalportland CO Vista Chino Plant | Thousand Palms | — | ◇ UNVERIFIED |
| FPForterra Pipe & Precast - Riverside | Romoland | — | ◇ UNVERIFIED |
| CSCoreslab Structures (l.a.) INC | Perris | 20–99 | ◐ LIKELY ACTIVE |
| HMHi-Grade Materials-Indio Ready Mix | Indio | 20–99 | ◐ LIKELY ACTIVE |
| MVMoreno Valley Plant 2 | Moreno Valley | 20–99 | ◐ LIKELY ACTIVE |
| SRSoil Retention Products INC | Perris | 20–99 | ◐ LIKELY ACTIVE |
| ABAtkinson Brick CO | Perris | — | ◇ UNVERIFIED |
| CCCardinal Cg | Moreno Valley | — | ◇ UNVERIFIED |
| CCCemex Construction Materials L P | Corona | — | ◇ UNVERIFIED |
| CCCemex Construction Materials L P | Perris | — | ◇ UNVERIFIED |
| DCDeleo Clay Tile CO INC | Lake Elsinore | — | ◇ UNVERIFIED |
Johns Manville CORP | Corona | — | ◇ UNVERIFIED |
| JRJ & R Concrete Products INC | Perris | — | ◇ UNVERIFIED |
| MEMartin Enterprises Dba Tj Composites | Nuevo | — | ◇ UNVERIFIED |
| RMReady-mix Moreno Valley Plant 2 | Moreno Valley | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix | Corona | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix | Beaumont | — | ◇ UNVERIFIED |
| SCSannipoli CORP | Menifee | — | ◇ UNVERIFIED |
| ACAquatic Co. Corona | Corona | 1–19 | ◐ LIKELY ACTIVE |
| ASArizona Shower Door - Riverside | Riverside | 1–19 | ◐ LIKELY ACTIVE |
| BPBanning Plant #48 | Banning | 1–19 | ◐ LIKELY ACTIVE |
| CCCalifornia Corona 391 N Main Street | Corona | 1–19 | ◐ LIKELY ACTIVE |
| CCCalifornia Corona 507 Queensland Circle | Corona | 1–19 | ◐ LIKELY ACTIVE |
| CPCalifornia Palm Desert 39740 Garrand Lane | Palm Desert | 1–19 | ◐ LIKELY ACTIVE |
| CTCalifornia Temecula 42006 Remington Avenue | Temecula | 1–19 | ◐ LIKELY ACTIVE |
| MVMoreno Valley CT | Moreno Valley | 20–99 | ◐ LIKELY ACTIVE |
| OOntpc | Menifee | 20–99 | ◐ LIKELY ACTIVE |
| PCPacific Clay Products, Inc. Lake Elsinore | Lake Elsinore | 100–499 | ◐ LIKELY ACTIVE |
| PPPaver Plant | Riverside | 20–99 | ◐ LIKELY ACTIVE |
| RRRancho Ready Mix Products, L.P Beaumont | Beaumont | 20–99 | ◐ LIKELY ACTIVE |
Riverside Manufacturing Facility | Riverside | 20–99 | ◐ LIKELY ACTIVE |
| RPRiverside Plant | Riverside | 20–99 | ◐ LIKELY ACTIVE |
| SJSan Jacinto Plant #6 | San Jacinto | 1–19 | ◐ LIKELY ACTIVE |
| SCSEK Corporation / Ouellette | Corona | 1–19 | ◐ LIKELY ACTIVE |
| TVTemescal Valley Plant #54 | Corona | 1–19 | ◐ LIKELY ACTIVE |
| WCWestlake Corona | Corona | 20–99 | ◐ LIKELY ACTIVE |
| WCWhited Cemetery Services | Menifee | 20–99 | ◐ LIKELY ACTIVE |
| LGLiberty Glass Fabricators INC | Corona | — | ◇ UNVERIFIED |