| HAHanson Aggregates Pacific Southwest INC | San Diego | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HRHarbor Ready-mix | Redwood City | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HBHiggins Brick CO | Chino Hills | CA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| HHHm Holloway INC - Gypsum Mines | Lost Hills | CA | Nonmetallic Mineral Product Manufacturing327420 | — | ◇ UNVERIFIED |
| HRHolliday Rock Canoga Park 31 | Canoga Park | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HRHolliday Rock Chino 18 | Chino | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HRHolliday Rock Colton Plant 4 | Bloomington | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HRHolliday Rock Company, INC | Littlerock | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HRHolliday Rock Company - Van Nuys | Van Nuys | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HRHolliday Rock San Bernardino 29 | San Bernardino | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HRHolliday Rock Westminster 20 | Westminster | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HCHoya Corporation USA | Fremont | CA | Nonmetallic Mineral Product Manufacturing327211 | — | ◇ UNVERIFIED |
| IMIndustrial Minerals CO | Sacramento | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| ICInland Concrete Products INC | Fontana | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| IIIsolatek International INC | San Bernardino | CA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
Jensen Enterprises INC Dba Jensen Precast | Ontario | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
Johns Manville CORP | Corona | CA | Nonmetallic Mineral Product Manufacturing327112 | — | ◇ UNVERIFIED |
| KSK Source INC. | Compton | CA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| LGLibbey Glass INC | Industry | CA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| LSLucas Site | La Puente | CA | Nonmetallic Mineral Product Manufacturing327000 | — | ◇ UNVERIFIED |
| LSLundberg Studios | Davenport | CA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| MAMagnum Abrasives INC | San Bernardino | CA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| MPMar-con Products INC | San Marcos | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MPModerno Porcelain San Diego LLC | Santee | CA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| MGMountain Gate Quarry | Redding | CA | Nonmetallic Mineral Product Manufacturing327122 | — | ◇ UNVERIFIED |
| NINewport Industrial Glass INC | Stanton | CA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| NUNewport-mesa Uni Sch Dist | Costa Mesa | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| NRNor-cal Rock INC | Hayward | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| NANorth American Recycling and Crushing LLC | Anaheim | CA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| NSNorth Star Water Treatment Facility | Grass Valley | CA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| OROceanside Rmc Plant | Oceanside | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OPOlson Precast CO | Rialto | CA | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| OPOmega Products International | Sacramento | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| OBOrco Block & Hardscape | Riverside | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| OFOrient & Flume Art Glass | Chico | CA | Nonmetallic Mineral Product Manufacturing327212 | 1-19 | ◇ UNVERIFIED |
| OROrosi Rock LLC | Orosi | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| OMOutback Materials | Friant | CA | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| OGOwens-brockway Glass Container INC | Antioch | CA | Nonmetallic Mineral Product Manufacturing327213 | — | ◇ UNVERIFIED |
| PRParadise Ready Mix | Paradise | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PPParamount Precast Design INC | Sun Valley | CA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| PCPhilips Components Discrete P | Los Angeles | CA | Nonmetallic Mineral Product Manufacturing327110 | — | ◇ UNVERIFIED |
| PNPilkington North America Incorporated | Lathrop | CA | Plastics and Rubber Products Manufacturing326211 | — | ◇ UNVERIFIED |
| PSPulp Studio INC | Gardena | CA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| RPResco Products INC | Santa Fe Spgs | CA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| RPRmc Pacific Materials (dba Cemex) | Davenport | CA | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| RPRmc Pacific Materials Incorporated | San Jose | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix | Corona | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix | Corona | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix | French Camp | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix San Bernardino Plant 12 | San Bernardino | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |