| PCPS California Rancho Cordova 2925 Gold Pan Court | Rancho Cordova | CA | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| PCPS California Sacramento 830 National Drive | Sacramento | CA | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| PCPS California Sun Valley 10671 Lorne Street | Sun Valley | CA | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| PCPS California Union City 1765 Atlantic Street | Union City | CA | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| RRRancho Ready Mix Products, L.P Beaumont | Beaumont | CA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| RMReady Mix Salinas | Salinas | CA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| RMReady Mix Volta | Los Banos | CA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| RMRHI Magnesita Santa Fe Springs | Santa Fe Springs | CA | Nonmetallic Mineral Product Manufacturing327120 | 1-19 | ◐ LIKELY ACTIVE |
| 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 |
| 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 |
| 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 |
| WCWhited Cemetery Services | Menifee | CA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| AIAdmixtures INC. | Baldwin Park | CA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◇ UNVERIFIED |
| ARAlpine Ready Mix | Lebec | CA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◇ UNVERIFIED |
| ASAluminum Sash & Door CO INC Dba Met-tec Shower | North Hollywood | CA | Nonmetallic Mineral Product Manufacturing327215 | 1-19 | ◇ UNVERIFIED |
| APAmerican Precast Concrete, INC. | El Monte | CA | Nonmetallic Mineral Product Manufacturing327331 | 1-19 | ◇ UNVERIFIED |
| AIAquarium Industrial Inc. | Chino | CA | Nonmetallic Mineral Product Manufacturing327215 | 1-19 | ◇ UNVERIFIED |
| ATArrow Transit Mix | Lancaster | CA | Nonmetallic Mineral Product Manufacturing327999 | 20-99 | ◇ UNVERIFIED |
| ATAuburn Tile | Ontario | CA | Nonmetallic Mineral Product Manufacturing327332 | 1-19 | ◇ UNVERIFIED |
| BBedrosians | Anaheim | CA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| BCBest Concrete Steps INC | San Leandro | CA | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◇ UNVERIFIED |
| BTBlock Tops, INC. | Sacramento | CA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |