| Mp Mine Operations Llc | Mountain Pass | 1.6M |
| Clean Harbors Buttonwillow Llc | Buttonwillow | 255.3k |
| Equinox Gold Corp Castle Mountain Venture Castle Mountain | Ivanpah | 31.9k |
| Hawker Pacific Aerospace | Sun Valley | 505 |
| Ardagh Glass Inc | Madera | 494 |
| Calportland Co Mojave Plant | Mojave | 378 |
| Martinez Refining Co Llc | Martinez | 336 |
| National Cement Co Of California Inc | Lebec | 252 |
| J.f. Shea Construction Inc Fawndale Rock & Asphalt | Redding | 137 |
| Calportland Oro Grande Plant | Oro Grande | 93 |
| Phillips 66 Rodeo Renewable Energy Complex | Rodeo | 83 |
| Northgate Ready Mix | Windsor | 83 |
| Torrance Refining Co Llc | Torrance | 71 |
| Chevron Products Co Richmond Refinery | Richmond | 63 |
| Collins Pine Co Chester Sawmill | Chester | 61 |
| Owens-Brockway Glass Container Inc Plant 23 | Vernon | 57 |
| Teledyne Battery Products | Redlands | 52 |
| Valero Refining Co-Cali Fornia Benicia Refinery | Benicia | 44 |
| Chevron Products Co. Div Of Chevron Usa Inc. | El Segundo | 38 |
| J.f. Shea Construction Inc. Aggregate Products | Redding | 37 |
| Trojan Battery Co Llc | Santa Fe Springs | 36 |
| Spreckels Sugar Co Inc. | Brawley | 31 |
| Owens-Brockway Glass Container Inc Plant #22 | Tracy | 27 |
| Trojan Battery Co. Llc | Santa Fe Springs | 25 |
| Tesoro Refining & Marketing Co Llc | Martinez | 20 |
| Tehachapi Cement Llc | Tehachapi | 20 |
| Kern Energy | Bakersfield | 19 |
| Us Battery Mfg Co | Corona | 17 |
| Gardena Plant 25 | Rosewood | 15 |
| Sun City Plant 8 | Sun City | 14 |
| Ecobat Resources California Inc. | City Of Industry | 14 |
| Rialto Plant 24 | Rialto | 13 |
| Moreno Valley Plant 2 | Moreno Valley | 13 |
| Otay Mesa Plant 28 | San Diego | 12 |
| Miramar Plant 33 | San Diego | 12 |
| Robertson's Ready Mix Fontana Plant 4 | Fontana | 11 |
| Redlands Plant 3 | Redlands | 11 |
| Pomona Plant 5 | Pomona | 10 |
| Phillips 66 Los Angeles Refinery Wilmington Plant | Wilmington | 10 |
| Riverside Plant 1 | Riverside | 9 |
| Roseburg Forest Products Co. - Weed Facility | Weed | 9 |
| Phillips 66 Los Angeles Refinery Carson Plant | Carson | 9 |
| Us Navy Silver Strand Training Complex (Sstc) | Coronado | 8 |
| Oldcastle Precast Inc | Chowchilla | 7 |
| Johns Manville | Willows | 7 |
| Equilon Carson Terminal | Carson | 7 |
| Anaheim Plant 16 | Anaheim | 7 |
| All American Asphalt | Perris | 7 |
| Ultramar Inc Wilmington Refinery | Wilmington | 7 |
| Murrieta Plant 27 | Murrieta | 6 |
| Irvine Plant 21 | Irvine | 6 |
| Los Angeles Plant 15 | Los Angeles | 6 |
| Irwindale Plant 13 | Irwindale | 6 |
| Palmdale Plant 39 | Palmdale | 6 |
| Corona Plant 30 | Corona | 6 |
| North Hollywood Plant 22 | North Hollywood | 6 |
| Us Pipe & Foundry Co Llc | Union City | 5 |
| Adelanto Plant 19 | Adelanto | 5 |
| Paramount Plant 23 | Paramount | 4 |
| Robertsons San Jacinto Plant | San Jacinto | 4 |
| Santa Fe Springs Plant 10 | Santa Fe Springs | 4 |
| Georgia-Pacific Gypsum Llc | Antioch | 4 |
| El Cajon Plant 29 | El Cajon | 4 |
| Guardian Industries Llc | Kingsburg | 4 |
| Escondido Plant 36 | Escondido | 3 |
| Oldcastle Precast Inc | Lakeside | 3 |
| Innovative Coating Technology Inc | Mojave | 3 |
| Robertson's Ready Mix Carroll Canyon Plant 32 | San Diego | 3 |
| Robertson's Ready Mix | Beaumont | 3 |
| Pasadena Plant 14 | Pasadena | 3 |
| Robertson's Ready Mix Lake Forest Plant 18 | Foothill Ranch | 3 |
| Thousand Palms Plant 26 | Thousand Palms | 2 |
| Hesperia Plant 31 | Hesperia | 2 |
| Robertson's Ready Mix Santa Ana Plant 17 | Santa Ana | 2 |
| Cabazon Plant 11 | Cabazon | 2 |
| Oldcastle Precast Inc | Fontana | 2 |
| New-Indy Containerboard Ontario Llc | Ontario | 2 |
| Holliday Rock - Foothill | Upland | 2 |
| Holliday Rock-Palmdale | Littlerock | 2 |
| Holliday Rock Co Inc - Campus | Upland | 2 |
| Rockwell Collins Inc | Fairfield | 2 |
| Chromal Plating Co | Los Angeles | 1 |
| Mission Valley Rock | Sunol | 1 |
| Us Gypsum Co | El Centro | 1 |
| Bakersfield Renewable Fuels Llc - Areas 1 & 2 | Bakersfield | 1 |
| Cemex Fresno Plant | Fresno | 1 |
| Okonite Co Inc | Santa Maria | 1 |
| Cemex Inglewood Plant | Inglewood | 1 |
| Air Products Manufacturing Llc | Paramount | 1 |
| Industrial Service Oil Co | Los Angeles | 1 |
| Oldcastle Precast Inc | Stockton | 1 |
| 3m Co - Corona | Corona | 1 |
| Oldcastle Precast Inc | Pleasanton | 1 |
| Oldcastle Infrastructure Inc. | Madera | 1 |
| Stellant Systems | Torrance | 1 |
| Martin Marietta San Diego Aggregates Llc - Miramar Hma | San Diego | 1 |
| Pacific Scientific Energetics Materials Co California | Hollister | 0 |
| Sierra Building Products | Fontana | 0 |
| Gold Bond Building Products - Long Beach | Long Beach | 0 |
| Concorde/Interspace Battery Corp | West Covina | 0 |