| MVMoreno Valley Plant 2 | Moreno Valley | CA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| NCNational City Ready Mix | National City | CA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| NINusano, INC | Valencia | CA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| OMOasis Materials Company LP | Poway | CA | Nonmetallic Mineral Product Manufacturing327110 | 20-99 | ◐ LIKELY ACTIVE |
| OBOldcastle Building Envelope | Fremont | CA | Nonmetallic Mineral Product Manufacturing327215 | 100-499 | ◐ LIKELY ACTIVE |
| OGOwens-brockway Glass Container INC | Vernon | CA | Nonmetallic Mineral Product Manufacturing327213 | 100-499 | ◐ LIKELY ACTIVE |
| PGPABCO Gypsum - Newark | Newark | CA | Nonmetallic Mineral Product Manufacturing327420 | 20-99 | ◐ LIKELY ACTIVE |
| PMProtech Minerals INC | Victorville | CA | Nonmetallic Mineral Product Manufacturing327124 | — | ◐ LIKELY ACTIVE |
| RRRancho Ready Mix Products, L.P Lake Elsinore | Colton | CA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| SBSan Bernardino Plant 12 | San Bernardino | CA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| SRSan Rafael Ready Mix | San Rafael | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| SQSFO Quikrete | Fremont | CA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| SRSoil Retention Products INC | Perris | CA | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◐ LIKELY ACTIVE |
| SCSoto Concrete | Sun Valley | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| SRState Ready Mix - a Calportland Company | Oxnard | CA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| TGTrulite Glass & Alluminum Solutions | City of Industry | CA | Nonmetallic Mineral Product Manufacturing327215 | 20-99 | ◐ LIKELY ACTIVE |
| TITwed-dell's INC. | Santa Ana | CA | Nonmetallic Mineral Product Manufacturing327215 | — | ▲ REPORTED CLOSED |
| UCUnion City | Union City | CA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| UMUnited Memorial Products, Whittier | Whittier | CA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| UGUS Gypsum Plaster City | El Centro | CA | Nonmetallic Mineral Product Manufacturing327420 | 100-499 | ◐ LIKELY ACTIVE |
| VRValley Rock Ready Mix, INC. | Lompoc | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| VRViking Ready Mix/Hanford | Hanford | CA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| AAA & a Ready Mixed Concrete INC | Gardena | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| AAA & a Ready Mixed Concrete INC | Signal Hill | CA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| AGAdp Granite & Marble Design INC | San Marcos | CA | Nonmetallic Mineral Product Manufacturing327991 | — | ◐ LIKELY ACTIVE |
| AMAeon Mfg CO INC | Harbor City | CA | Nonmetallic Mineral Product Manufacturing327991 | 20-99 | ◐ LIKELY ACTIVE |
| AQAmerican Quartz Group, INC. | Barstow | CA | Nonmetallic Mineral Product Manufacturing327991 | 20-99 | ◐ LIKELY ACTIVE |
| ARAssociated Ready Mix | Foothill Ranch | CA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| ARAssociated Ready Mixed Concrete | Fountain Valley | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| ARAssociated Ready Mixed Concrete INC | Sun Valley | CA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| ARAssociated Ready Mixed Concrete INC | Los Angeles | CA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| BABagatelos Architectural Glass Systems, INC. | Sacramento | CA | Nonmetallic Mineral Product Manufacturing327211 | 20-99 | ◐ LIKELY ACTIVE |
| BBBasalite Block | Tracy | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| BRBoral Roofing, LLC | Rialto | CA | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| CPCalifornia Portland Cement CO | Torrance | CA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| CCCalportland Company | National City | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| CCCalportland Company Lax Plant | Los Angeles | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| CCCalportland Company Miramar | San Diego | CA | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
Calportland Construction - Solvang Cbp | Solvang | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| CCCalportland CO Santa Maria Plant | Santa Maria | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| CGCalstone Gilroy-oldcastle Apg | Gilroy | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◐ LIKELY ACTIVE |
| CTCalstone Tracy-oldcastle Apg | Tracy | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◐ LIKELY ACTIVE |
| CACemex Antioch | Antioch | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| CCCemex Cmp, LLC. - Lincoln | Lincoln | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| CCCemex Concord | Concord | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| CCCemex Construction Materials L P | Corona | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| CCCemex Construction Materials L P | Perris | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| CCCemex Construction Materials LP | Orange | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| CCCemex Construction Materials Pacific LLC | Fairfield | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| CCCemex Construction Materials Pacific LLC | West Hollywood | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |