| 1 | Zim Industries Inc. Dba Bakersfield Well & Pump Co. | 294 | 646 | 1,716 |
| 2 | Camp S A Pump Company | 261 | 424 | 497 |
| 3 | Consolidated Testing Laboratories Inc. | 113 | 380 | 1,405 |
| 4 | A-1 Drilling & Pump | 90 | 90 | 218 |
| 5 | Farwest Corrosion Control Company | 88 | 439 | 2,649 |
| 6 | Abundant Water Wells | 72 | 73 | 173 |
| 7 | Bryant Pump & Drilling Company | 55 | 537 | 1,000 |
| 8 | American Construction And Supply Inc. | 54 | 225 | 1,685 |
| 9 | Hearn Drilling Co. | 52 | 488 | 492 |
| 10 | Johnson Drilling Co. | 48 | 1,065 | 11,865 |
| 11 | Farm Pump And Irrigation Company Inc. | 47 | 280 | 451 |
| 12 | Garrison Brothers Well Service | 39 | 39 | 46 |
| 13 | South Valley Pump & Drilling | 38 | 38 | 69 |
| 14 | Drill Hog | 35 | 35 | 74 |
| 15 | Boetsch Well Drilling And Pump Service | 34 | 370 | 522 |
| 16 | C J Logan Pump & Electric Inc. | 31 | 31 | 34 |
| 17 | Vics Well Drilling Inc. | 29 | 33 | 337 |
| 18 | Hearn Ritchison Drilling LLC | 26 | 26 | 26 |
| 19 | Cascade Drilling LP | 24 | 24 | 826 |
| 20 | Matthew Davis Enterprises Inc. | 22 | 22 | 40 |
| 21 | Lackey Drilling | 20 | 29 | 41 |
| 22 | Cascade Drilling L P | 17 | 35 | 2,827 |
| 23 | Petro - Lud Inc. | 17 | 18 | 26 |
| 24 | Layne Christensen Company | 15 | 71 | 2,362 |
| 25 | Myers Brothers Well Drilling Inc. | 13 | 50 | 2,865 |
| 26 | Nor - Cal Pump & Well Drilling Inc. | 11 | 12 | 248 |
| 27 | Gregory Drilling Incorporated | 11 | 11 | 143 |
| 28 | Arsenal Well Drilling Inc. | 8 | 8 | 234 |
| 29 | Well Industries Inc. | 7 | 7 | 558 |
| 30 | Anthony J Prieto | 7 | 7 | 2,330 |
| 31 | Best Drilling And Pump Inc. | 6 | 23 | 248 |
| 32 | Corrpro Companies Inc. | 6 | 8 | 737 |
| 33 | Bertram Drilling Inc. | 6 | 7 | 1,171 |
| 34 | Central Valley Well Drilling & Pumps LLC | 6 | 6 | 102 |
| 35 | Boart Longyear Company | 5 | 15 | 172 |
| 36 | S/G Testing Laboratories Inc. | 5 | 6 | 187 |
| 37 | Gregg Drilling LLC | 5 | 5 | 558 |
| 38 | J & O Well Drilling | 5 | 5 | 159 |
| 39 | Lackey Bob Drilling | 4 | 28 | 32 |
| 40 | Gregg Drilling & Testing Inc. | 4 | 22 | 4,828 |
| 41 | Bradley & Sons Inc. | 4 | 19 | 3,627 |
| 42 | Big Dog Drilling Inc. | 4 | 14 | 70 |
| 43 | Barbour Well Inc. | 4 | 7 | 32 |
| 44 | Strickland Enterprises Inc. | 4 | 4 | 2,026 |
| 45 | A B C Liovin Drilling Inc. | 4 | 4 | 1,281 |
| 46 | King Pump And Well, Inc. | 4 | 4 | 47 |
| 47 | Signal Drilling Company | 3 | 454 | 8,301 |
| 48 | Grabow Well Drilling Company | 3 | 55 | 2,646 |
| 49 | Yellow Jacket Drilling Services LLC | 3 | 6 | 291 |
| 50 | Filipponi-Thompson Drilling Inc. | 3 | 3 | 2,133 |
| 51 | B & B Well Drilling Incorporated | 3 | 3 | 390 |
| 52 | Geocentric Drilling Inc. | 3 | 3 | 81 |
| 53 | Stonehouse Well Drilling | 3 | 3 | 157 |
| 54 | M & M Well Drilling | 3 | 3 | 74 |
| 55 | Deer Creek Drilling Inc. | 3 | 3 | 38 |
| 56 | Kirschenman's Well Drilling | 2 | 898 | 1,159 |
| 57 | Rottman Drilling Co. | 2 | 306 | 1,331 |
| 58 | Arthur & Orum Well Drilling Inc. | 2 | 33 | 3,219 |
| 59 | Miller Drilling Co. | 2 | 25 | 1,775 |
| 60 | Bc2 Environmental LLC | 2 | 4 | 416 |
| 61 | Canepa And Sons Inc. | 2 | 3 | 3,173 |
| 62 | Haynes & Sons Well Drilling | 2 | 3 | 1,242 |
| 63 | Big River Drilling LLC | 2 | 2 | 715 |
| 64 | Prieto Anthony J Water Well Drilling Inc. | 2 | 2 | 637 |
| 65 | H & B Drilling And Sons LLC | 2 | 2 | 414 |
| 66 | Wildrose Drilling LLC | 2 | 2 | 102 |
| 67 | A Z C A Drilling & Pump Inc. | 2 | 2 | 171 |
| 68 | Five Star Well Drilling Inc. | 2 | 2 | 45 |
| 69 | National E W P Inc. | 1 | 6 | 431 |
| 70 | Water Well Service Inc. | 1 | 3 | 145 |
| 71 | Eagle Well Drilling & Pump Service | 1 | 2 | 542 |
| 72 | Castle Construction & Well Drilling Inc. | 1 | 2 | 142 |
| 73 | Scott Belknap Well Drilling Inc. | 1 | 1 | 1,131 |
| 74 | 99 Drilling LLC | 1 | 1 | 265 |
| 75 | Fisch Drilling And Pump Inc. | 1 | 1 | 663 |
| 76 | C R Well Drilling | 1 | 1 | 455 |
| 77 | All American Drilling Inc. | 1 | 1 | 144 |
| 78 | Oasis FG Drilling | 1 | 1 | 60 |
| 79 | Samuel's Drilling | 1 | 1 | 38 |
| 80 | National Corrosion | 1 | 1 | 28 |
| 81 | Diversified Drilling | 1 | 1 | 82 |
| 82 | Donald C Vickery Well Drilling | 1 | 1 | 150 |
| 83 | Starr Drilling And Pump Co. | — | 677 | 875 |
| 84 | D. W. Slooum | — | 669 | 688 |
| 85 | Crown Drilling & Pump | — | 585 | 596 |
| 86 | Trudell Drilling Co. | — | 575 | 707 |
| 87 | Wasco Drilling Company, Inc. | — | 520 | 554 |
| 88 | Sheela Drilling | — | 497 | 499 |
| 89 | Whitten Pumps Inc. | — | 469 | 874 |
| 90 | Diversified Exploration Co. Inc. | — | 306 | 751 |
| 91 | Bakersfield Pump Co. | — | 261 | 303 |
| 92 | Mel Meyer | — | 240 | 101,127 |
| 93 | M A Bryant Drilling | — | 222 | 311 |
| 94 | Sage Bros Drilling Co. | — | 200 | 232 |
| 95 | D W Slocum Water Well Drilling | — | 200 | 217 |
| 96 | Clark Albert M | — | 176 | 181 |
| 97 | Redfeairn R L Drilling | — | 170 | 195 |
| 98 | Rainbow Drilling | — | 156 | 207 |
| 99 | Owens Drilling Co., Inc. | — | 146 | 805 |
| 100 | Don Redfeairn Drilling Co. | — | 140 | 186 |
| 101 | D-R Water Well Drill | — | 137 | 196 |
| 102 | Moss Roscoe Company | — | 130 | 1,220 |
| 103 | Arthur F Loper | — | 103 | 123 |
| 104 | Pacific Coast Well Drilling Inc. | — | 92 | 337 |
| 105 | Tex Bassham Drilling | — | 89 | 107 |
| 106 | C. Cruse Drilling | — | 73 | 301 |
| 107 | W D C Exploration & Wells | — | 63 | 2,421 |
| 108 | F P I Well Drilling Inc. | — | 63 | 96 |
| 109 | Virgil H Chase | — | 63 | 63 |
| 110 | Golden Empire Drilling | — | 59 | 168 |
| 111 | Reliance Drilling Co. | — | 59 | 62 |
| 112 | Beylik Drilling & Pump Service | — | 58 | 1,267 |
| 113 | Cruse Drilling Co. | — | 56 | 341 |
| 114 | Robertson Drilling Co. | — | 55 | 61 |
| 115 | Martin & Son Water Well Drilling | — | 54 | 54 |
| 116 | Barnes Core Drlg | — | 52 | 86 |
| 117 | Janco Pump & Equipment Co. | — | 49 | 49 |
| 118 | Layne-Western Co. Inc. | — | 46 | 255 |
| 119 | Evans Bros | — | 46 | 107 |
| 120 | Klein Knight Drlg Co. | — | 44 | 72 |
| 121 | Hylton Drilling Co. | — | 44 | 57 |
| 122 | Robertson Bros | — | 43 | 68 |
| 123 | Reuben J Boe Water Well Drilling | — | 43 | 45 |
| 124 | K & D Drilling | — | 41 | 42 |
| 125 | FA Moves | — | 38 | 38 |
| 126 | Rauch Drilling Company Inc. | — | 35 | 520 |
| 127 | Owen Drilling Co. | — | 35 | 255 |
| 128 | E H Bradfield & Son | — | 35 | 35 |
| 129 | Roy S Devoe | — | 35 | 35 |
| 130 | Hail Drlg | — | 32 | 32 |
| 131 | Peaker Paul | — | 30 | 36 |
| 132 | Riley W Rummans | — | 29 | 29 |
| 133 | Melton Drilling Co. | — | 28 | 46 |
| 134 | Water Well Drilling Ernest E Bartell | — | 27 | 33 |
| 135 | Knapp & Graham Inc. | — | 25 | 596 |
| 136 | Rottman Dick Water Well Drilling | — | 25 | 211 |
| 137 | Southern Sierra Drilling | — | 25 | 92 |
| 138 | California Waterwell Serv | — | 25 | 25 |
| 139 | Gungle Drilling | — | 24 | 27 |
| 140 | Aqua Drilling | — | 23 | 923 |
| 141 | Terry Well Drilling | — | 23 | 58 |
| 142 | Howard Pump Inc. A California Corporation | — | 22 | 1,650 |
| 143 | Myers Brothers Inc. | — | 22 | 796 |
| 144 | J C Water Well Drilling | — | 22 | 52 |
| 145 | Keener Exploration Drilling Co. | — | 22 | 37 |
| 146 | Myers Reverse, Inc. | — | 21 | 2,389 |
| 147 | C C Scott | — | 20 | 75 |
| 148 | ED Owens & Son Drilling Co. | — | 20 | 48 |
| 149 | S A Andresen All Terrain Exploration | — | 16 | 468 |
| 150 | Hydro Resources - West Inc. | — | 16 | 97 |
| 151 | Clement D Clubb C-G Drilling | — | 14 | 192 |
| 152 | Corrosion Technology Inc. | — | 14 | 169 |
| 153 | Sargent Drilling | — | 11 | 442 |
| 154 | Beks Acquisition Inc. | — | 11 | 465 |
| 155 | Belknap Scott M Well Drilling | — | 11 | 272 |
| 156 | Midway Drilling & Pump Company | — | 10 | 753 |
| 157 | Frank Scully/Morrison Drilling Inc. | — | 10 | 582 |
| 158 | Beylik Drilling Inc. | — | 10 | 174 |
| 159 | Enloe Well Drilling | — | 8 | 279 |
| 160 | Randall N Wallis | — | 8 | 531 |
| 161 | Cascade Drilling Inc. - California | — | 8 | 3,167 |
| 162 | Allen's Drilling | — | 8 | 63 |
| 163 | Western Well Drilling Co. Ltd | — | 7 | 842 |
| 164 | J & H Drilling Co. Inc. | — | 6 | 978 |
| 165 | Maggiora Bros Drilling Inc. | — | 6 | 4,674 |
| 166 | Myers Well Drilling Inc. | — | 6 | 763 |
| 167 | Krazan & Associates | — | 6 | 30 |
| 168 | H-F Drilling, Inc. | — | 6 | 618 |
| 169 | Big Valley Water LLC | — | 6 | 356 |
| 170 | Curtis Hole Drilling Company | — | 6 | 187 |
| 171 | L Larson | — | 6 | 36 |
| 172 | Testamerica Drilling Corp | — | 5 | 378 |
| 173 | L. Wade Inc. | — | 4 | 93 |
| 174 | Environmental West Drilling | — | 4 | 38 |
| 175 | Bsk Associates | — | 4 | 37 |
| 176 | Miller & Johnson | — | 4 | 25 |
| 177 | Walt Bannon Drilling Inc. | — | 3 | 2,498 |
| 178 | Roadrunner Drilling & Pump Company Inc. | — | 3 | 205 |
| 179 | MC Dougall's Well Drilling Inc. | — | 3 | 1,345 |
| 180 | Burt Drilling Co. | — | 3 | 438 |
| 181 | C W Drilling | — | 3 | 55 |
| 182 | H W Bence | — | 3 | 47 |
| 183 | Southwest Pump & Drilling Inc. | — | 2 | 290 |
| 184 | West Hazmat Drilling Corp | — | 2 | 1,702 |
| 185 | C & N Pump & Well Co. | — | 2 | 697 |
| 186 | Mccalla Brothers | — | 2 | 578 |
| 187 | Batson Drilling Service | — | 2 | 436 |
| 188 | Island Drilling | — | 2 | 221 |
| 189 | F H Dengley | — | 2 | 167 |
| 190 | SO Cal Pump And Well Drilling | — | 2 | 158 |
| 191 | Soilprobe Inc. | — | 2 | 133 |
| 192 | Xxx | — | 2 | 113 |
| 193 | Leroy Tyler | — | 2 | 100 |
| 194 | Dail Rhoads Well Drilling | — | 2 | 95 |
| 195 | Barber-Bridge Drilling Corp Ltd | — | 2 | 64 |
| 196 | Keeler Drlg Co. | — | 2 | 30 |
| 197 | Scoggin Drilling & Dev Co. | — | 2 | 30 |
| 198 | Eaton Drilling Co. LLC | — | 1 | 3,793 |
| 199 | Bess D Pump & Well Elect | — | 1 | 359 |
| 200 | Sierra Exploration Drilling Co. Inc. | — | 1 | 802 |
| 201 | Pacific Coast Drilling | — | 1 | 262 |
| 202 | Maranatha Drilling And Pump Service | — | 1 | 307 |
| 203 | Cache Creek Drilling | — | 1 | 247 |
| 204 | Bill Belknap | — | 1 | 2,758 |
| 205 | Valley Well & Pump Co. Inc. | — | 1 | 308 |
| 206 | Tezak Pump Co. Inc. | — | 1 | 2,380 |
| 207 | Pitcher Drilling Co. | — | 1 | 1,232 |
| 208 | Trunnell Wells & Pumps | — | 1 | 384 |
| 209 | Clovis Pump & Water Well | — | 1 | 323 |
| 210 | Spectrum Exploration Inc. | — | 1 | 307 |
| 211 | Filipponi & Thompson Drilling Company | — | 1 | 303 |
| 212 | Big Valley Drilling | — | 1 | 294 |
| 213 | Pacific Gas And Electric Company | — | 1 | 264 |
| 214 | Mcgann Drilling | — | 1 | 254 |
| 215 | Ralph E Anderson | — | 1 | 171 |
| 216 | Bass Drilling | — | 1 | 154 |
| 217 | Council Harold Drilling Co. | — | 1 | 154 |
| 218 | Crisp & Sons Well Drilling | — | 1 | 136 |
| 219 | B & W Drilling | — | 1 | 132 |
| 220 | Roscoe Moss Company | — | 1 | 130 |
| 221 | M R Peck & Sons | — | 1 | 125 |
| 222 | H C Steines | — | 1 | 115 |
| 223 | D L Rinker | — | 1 | 111 |
| 224 | Ase Drilling Inc. | — | 1 | 82 |
| 225 | Pioneer Drilling Inc. | — | 1 | 61 |
| 226 | Mogle Brothers | — | 1 | 57 |
| 227 | S I Guardino | — | 1 | 43 |
| 228 | All American Water Supply OF California Inc. | — | 1 | 40 |