| RCRialto, CA | Rialto | CA | Nonmetallic Mineral Product Manufacturing327331 | 1-19 | ◐ LIKELY ACTIVE |
| RPRialto Plant #24 | Rialto | CA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| RPRidgecrest Plant #38 | Ridgecrest | CA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
Riverside Manufacturing Facility | Riverside | CA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| RPRiverside Plant | Riverside | CA | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◐ LIKELY ACTIVE |
| SPSACP Pavestone | Winters | CA | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◐ LIKELY ACTIVE |
| SCSan Clemente Plant #20 | San Clemente | CA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| SISandman Inc. | San Jose | CA | Nonmetallic Mineral Product Manufacturing327320 | 100-499 | ◐ LIKELY ACTIVE |
| SJSan Jacinto Plant #6 | San Jacinto | CA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| SASanta Ana Plant #17 | Santa Ana | CA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| SCSEK Corporation / Kondo | Valencia | CA | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| SCSEK Corporation / Ouellette | Corona | CA | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| SSfodip | Union City | CA | Nonmetallic Mineral Product Manufacturing327332 | 100-499 | ◐ LIKELY ACTIVE |
| SDShafter Division | Shafter | CA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| SGShafter Glass Mat | Shafter | CA | Nonmetallic Mineral Product Manufacturing327212 | 20-99 | ◐ LIKELY ACTIVE |
| SSSika Santa Fe Springs | Santa Fe Springs | CA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| SVSimi Valley #49 | Simi Valley | CA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| SRSoil Retention Systems, INC. | Carlsbad | CA | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◐ LIKELY ACTIVE |
| SCSound Crete Contractors | Escondido | CA | Nonmetallic Mineral Product Manufacturing327310 | 20-99 | ◐ LIKELY ACTIVE |
| SRSpragues' Ready Mix- Irwindale | Irwindale | CA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| SPStanton Plant | Stanton | CA | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◐ LIKELY ACTIVE |
| TITexston Industries, INC | Canoga Park | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◐ LIKELY ACTIVE |
| TPThompson Pipe Group Precast Rialto | Rialto | CA | Nonmetallic Mineral Product Manufacturing327332 | 100-499 | ◐ LIKELY ACTIVE |
| TRTNT Ready Mix | Truckee | CA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| TUToto USA Ontario | Ontario | CA | Nonmetallic Mineral Product Manufacturing327110 | 20-99 | ◐ LIKELY ACTIVE |
| TGTRULITE GLASS AND ALUMINUM SOLUTIONS LLC -City of Industry | City of Industry | CA | Nonmetallic Mineral Product Manufacturing327215 | 20-99 | ◐ LIKELY ACTIVE |
| TRTulare Ready Mix Plant | Tulare | CA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| UCUtility Concrete Products - Littlerock (Palmdale) California | Littlerock | CA | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| VPVernon Plant #15 | Los Angeles | CA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| VMVictor M Garza | El Cajon | CA | Nonmetallic Mineral Product Manufacturing327993 | — | ◐ LIKELY ACTIVE |
| VPVictorville Plant #42 | Victorville | CA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| VRViking Ready Mix/Shirk | Visalia | CA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| WCWestlake Corona | Corona | CA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| WRWestlake Royal Roofing - Rialto | Rialto | CA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| WCWhited Cemetery Services | Menifee | CA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| ECEast County Ready Mix & Materials CORP. | El Cajon | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| FNFresno Neon Sign | Fresno | CA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| LGLiberty Glass Fabricators INC | Corona | CA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| MPMerrill Precast & Supply INC | Grass Valley | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OFOrient & Flume Art Glass | Chico | CA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| RRRamos Ready Mix LLC | Lancaster | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RRRhi Refractories - Indian Hill | Ione | CA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| 1P1001 Presidio Sq | Costa Mesa | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| 1T10218 Toluca LLC | Toluca Lake | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| 1W1200 Wilshire LLC | Los Angeles | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| 1K1232 Keel LLC | Corona Del Mar | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| 1S130 Sutter Street Associates, LLC | San Francisco | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| 1N1340 N Poinsettia LLC | Los Angeles | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| 1G1453 Galaxy Dr Newport Beach LLC | Newport Beach | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| 1W1484 West LLC | Fullerton | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |