| 1 | Great Basin Drilling | 532 | 5,063 | 5,456 |
| 2 | Jim Pike Well Drilling LLC | 411 | 3,333 | 3,335 |
| 3 | Strickland Construction Co. Inc. | 299 | 1,255 | 1,257 |
| 4 | Boart Longyear | 235 | 547 | 3,633 |
| 5 | Layne Christensen Co. | 165 | 207 | 738 |
| 6 | Budget Drilling Co. | 158 | 190 | 884 |
| 7 | Ream Drilling | 84 | 84 | 125 |
| 8 | Parsons Drilling Inc. | 27 | 88 | 4,125 |
| 9 | Davis Drilling & Pumps | 24 | 101 | 638 |
| 10 | David Gibson Contractor LLC | 20 | 26 | 114 |
| 11 | Cascade Drilling LP | 18 | 18 | 4,479 |
| 12 | Welsco Corp | 15 | 28 | 2,537 |
| 13 | Rosenlund Drilling LLC | 15 | 28 | 540 |
| 14 | Lewis Drilling LLC | 12 | 12 | 98 |
| 15 | National Ewp Inc. | 11 | 38 | 2,155 |
| 16 | Major Drilling America Inc. | 11 | 14 | 138 |
| 17 | Yellow Jacket Drilling Services LLC | 11 | 11 | 333 |
| 18 | Premier Drilling Company | 8 | 8 | 67 |
| 19 | Gardner Brothers Drilling Inc. | 7 | 18 | 94 |
| 20 | Western Strata Exploration Inc. | 6 | 6 | 182 |
| 21 | Haz-Tech Drilling Inc. | 5 | 12 | 830 |
| 22 | Nevada Webber Drilling Inc. | 5 | 10 | 74 |
| 23 | Stonehouse Drilling & Construction LLC | 4 | 4 | 363 |
| 24 | Harris Exploration Drilling & Associates Inc. | 4 | 4 | 37 |
| 25 | Hydro Resources West Inc. | 3 | 7 | 300 |
| 26 | BC@ Environmental LLC | 3 | 3 | 624 |
| 27 | AB Drilling | 3 | 3 | 45 |
| 28 | Christiansen Drilling Inc. | 2 | 39 | 521 |
| 29 | Fred Anderson Drilling Inc. | 2 | 6 | 643 |
| 30 | J & H Drilling | 2 | 2 | 149 |
| 31 | Eagle Drilling Services LLC | 1 | 35 | 3,374 |
| 32 | Leach Drilling Inc. | 1 | 18 | 1,400 |
| 33 | Bc2 Environmental LLC | 1 | 1 | 1,032 |
| 34 | Capital City Well Drilling & Pump Service Inc. | 1 | 1 | 1,240 |
| 35 | S & S Water Wells | 1 | 1 | 28 |
| 36 | Charles Nyberg Well Drilling | — | 1,454 | 1,531 |
| 37 | S & H Drilling | — | 489 | 508 |
| 38 | Wayne Floyd Pumps & Drilling | — | 337 | 346 |
| 39 | Floyds Construction | — | 328 | 344 |
| 40 | Cook Drilling Co. #2 Inc. | — | 317 | 327 |
| 41 | Larrys Waterwell Service | — | 287 | 288 |
| 42 | Custom Drilling Inc. | — | 241 | 242 |
| 43 | Eklund Drilling Co. Inc. | — | 148 | 1,580 |
| 44 | Woytek Drilling Co. | — | 147 | 331 |
| 45 | C B Capehart | — | 138 | 140 |
| 46 | Gatzke Drilling | — | 88 | 144 |
| 47 | Ron Naillon Well Drilling & Pumps | — | 85 | 86 |
| 48 | Bruce Robinson Drilling Co. | — | 78 | 326 |
| 49 | John Floyd Well Drilling | — | 74 | 74 |
| 50 | Larue Construction Co. | — | 73 | 73 |
| 51 | Thompson Drilling Co. Inc. | — | 61 | 1,080 |
| 52 | Lang Exploratory Drilling | — | 50 | 1,532 |
| 53 | E. C. Ferguson | — | 41 | 46 |
| 54 | C - D Co. | — | 39 | 40 |
| 55 | J D Hill | — | 37 | 124 |
| 56 | Hydro Resources Nevada Inc. | — | 36 | 459 |
| 57 | Stanley Ford | — | 34 | 35 |
| 58 | Dimick Drilling | — | 33 | 1,633 |
| 59 | T & R Drilling | — | 31 | 298 |
| 60 | W D C Exploration & Wells | — | 28 | 1,910 |
| 61 | Gullard Drilling & Boring | — | 28 | 225 |
| 62 | Valley Drilling | — | 26 | 111 |
| 63 | Hackworth Drilling Inc. | — | 24 | 2,790 |
| 64 | A A A Drilling | — | 23 | 158 |
| 65 | Water Well Services | — | 20 | 413 |
| 66 | Humboldt Drilling & Pump Co. | — | 19 | 1,494 |
| 67 | Bruce Young | — | 19 | 34 |
| 68 | Water Development Corp (The) | — | 17 | 609 |
| 69 | Weber Environmental Inc. | — | 16 | 729 |
| 70 | Sargent Irrigation Inc. | — | 14 | 429 |
| 71 | Bechtel Nevada Corporation | — | 14 | 43 |
| 72 | Briner Drilling Inc. | — | 13 | 434 |
| 73 | American Drilling & Pump Service | — | 13 | 172 |
| 74 | Maynard Well Drilling & Pump Sales | — | 12 | 112 |
| 75 | Aqua Drilling & Well Service Inc. | — | 11 | 2,675 |
| 76 | Enloe Drilling Co. | — | 11 | 597 |
| 77 | Converse Consultants | — | 10 | 790 |
| 78 | J B Reynolds | — | 10 | 343 |
| 79 | J D Hill Drilling Co. | — | 10 | 50 |
| 80 | Desert Drilling | — | 9 | 1,187 |
| 81 | W L Mcdonald And Co. Inc. | — | 9 | 815 |
| 82 | A A A Drilling & Equipment Rental | — | 9 | 377 |
| 83 | Boart Longyear Nevada | — | 9 | 329 |
| 84 | Darell H Free | — | 9 | 202 |
| 85 | Steve Kawchack | — | 9 | 146 |
| 86 | US Geological Survey | — | 9 | 127 |
| 87 | Stretchs Exploration Inc. | — | 9 | 52 |
| 88 | Potter Drilling Co. | — | 9 | 51 |
| 89 | U S Geological Survey | — | 9 | 42 |
| 90 | Wright Drilling Inc. | — | 8 | 87 |
| 91 | High Desert Drilling LLC | — | 7 | 384 |
| 92 | Alternative Drilling Company LLC | — | 7 | 243 |
| 93 | Maynard Well Drilling | — | 7 | 95 |
| 94 | Darell Free | — | 7 | 55 |
| 95 | Frank J Schuh | — | 7 | 35 |
| 96 | Layne Western Co. | — | 6 | 97 |
| 97 | Effinger Drilling & Pump Svc | — | 5 | 370 |
| 98 | Mitchell Enterprises | — | 5 | 294 |
| 99 | Aqua Drilling & Well Service I | — | 5 | 225 |
| 100 | Elsing Well Drilling & Pump Co. | — | 5 | 155 |
| 101 | Beylik Drilling Inc. | — | 5 | 131 |
| 102 | Bill Blood | — | 5 | 77 |
| 103 | William Cooper | — | 5 | 77 |
| 104 | S & R Drilling Co. | — | 5 | 64 |
| 105 | Robertson Eng & Drill | — | 5 | 47 |
| 106 | Badlands Drilling Corp | — | 5 | 28 |
| 107 | Bruce Mackay Pump & Well Service Inc. | — | 4 | 2,849 |
| 108 | S R Mckinney & Sons Inc. | — | 4 | 737 |
| 109 | Eddco Exploration Inc. | — | 4 | 320 |
| 110 | C M Robinson JR | — | 4 | 121 |
| 111 | F B Hicks Drilling Co. | — | 4 | 91 |
| 112 | Layne Environmental | — | 4 | 61 |
| 113 | Compliance Drilling Corp | — | 4 | 43 |
| 114 | Grant W Cox | — | 4 | 26 |
| 115 | Don Wilson | — | 3 | 323 |
| 116 | Sierra Pump & Drilling | — | 3 | 294 |
| 117 | Mel Meyer | — | 3 | 258 |
| 118 | Richard Leblanc | — | 3 | 243 |
| 119 | Allen Water Well Service Co. | — | 3 | 231 |
| 120 | Sage Brothers Drilling Co. Inc. | — | 3 | 178 |
| 121 | Rimrock Drilling Inc. | — | 3 | 145 |
| 122 | Gustin Corp | — | 3 | 139 |
| 123 | T H F Drilling Inc. | — | 3 | 127 |
| 124 | Glen Maddox | — | 3 | 116 |
| 125 | Patrick H Thompson | — | 3 | 115 |
| 126 | Oasis Drilling Inc. | — | 3 | 113 |
| 127 | Fred Anderson & Son Exploratio | — | 3 | 107 |
| 128 | H A Sevey | — | 3 | 63 |
| 129 | Hatch Drilling Co. | — | 3 | 30 |
| 130 | Wayne Drilling Inc. | — | 2 | 2,457 |
| 131 | Fertig Drilling Co. | — | 2 | 762 |
| 132 | Redding Drilling | — | 2 | 470 |
| 133 | Armstrong Bros | — | 2 | 401 |
| 134 | Louis F Evans | — | 2 | 291 |
| 135 | B & B Drilling Co. Inc. | — | 2 | 269 |
| 136 | Emdlco Inc. | — | 2 | 179 |
| 137 | Blain Well Drilling | — | 2 | 114 |
| 138 | Brinkerhoff Pump & Drilling Co. Inc. | — | 2 | 101 |
| 139 | Weimer Drilling | — | 2 | 97 |
| 140 | Charles Sargent Irrigation Inc. | — | 2 | 66 |
| 141 | American Drilling Co. | — | 2 | 60 |
| 142 | Carson Pump | — | 1 | 374 |
| 143 | Okeefe Drilling Company Inc. | — | 1 | 139 |
| 144 | Allen Drilling Inc. | — | 1 | 5,330 |
| 145 | W M Blain Well Drilling & Pumps | — | 1 | 904 |
| 146 | Elite Drilling Inc. | — | 1 | 619 |
| 147 | Muth Drilling Co. | — | 1 | 563 |
| 148 | Nevada Drilling Inc. | — | 1 | 547 |
| 149 | Fred Anderson & Son Exploration Drilling Inc. | — | 1 | 479 |
| 150 | Ogden Bros Drilling | — | 1 | 349 |
| 151 | Edmund Miller Drilling Co. | — | 1 | 218 |
| 152 | Nevada Pump & Drilling | — | 1 | 177 |
| 153 | Vernon Cannon JR | — | 1 | 176 |
| 154 | R C B B Inc. | — | 1 | 163 |
| 155 | Vincent Dresden | — | 1 | 92 |
| 156 | A O Large | — | 1 | 78 |
| 157 | Becker Drills Inc. | — | 1 | 45 |
| 158 | Maranatha Drilling & Pump Service | — | 1 | 41 |
| 159 | Inland Pacific Drilling Co. Inc. | — | 1 | 36 |
| 160 | Barnes Well Drilling | — | 1 | 35 |
| 161 | Zim Irrigation & Bakersfield Well & Pump Co. | — | 1 | 31 |
| 162 | J W Biffle | — | 1 | 31 |