| 1 | Capital City Well Drilling & Pump Service Inc. | 190 | 385 | 1,240 |
| 2 | Blain Well Drilling And Pump Inc. | 186 | 217 | 711 |
| 3 | Bruce Mackay Pump & Well Service Inc. | 177 | 239 | 2,849 |
| 4 | Welsco Corp | 100 | 207 | 2,537 |
| 5 | Ogden Drilling | 77 | 117 | 122 |
| 6 | Stonehouse Drilling & Construction LLC | 69 | 84 | 363 |
| 7 | Parsons Drilling Inc. | 56 | 247 | 4,125 |
| 8 | Leach Drilling Inc. | 45 | 946 | 1,400 |
| 9 | Cascade Drilling LP | 36 | 98 | 4,479 |
| 10 | Viking Drillers Inc. | 19 | 19 | 5,086 |
| 11 | Double R Water Well Service | 17 | 17 | 105 |
| 12 | Blain Drilling & Pump Co. | 14 | 343 | 657 |
| 13 | Yellow Jacket Drilling Services LLC | 11 | 52 | 333 |
| 14 | Hydro Resources West Inc. | 7 | 33 | 300 |
| 15 | Carson Pump | 6 | 44 | 374 |
| 16 | Gregory Drilling | 5 | 5 | 46 |
| 17 | Andresen Exploration Drilling | 3 | 143 | 1,529 |
| 18 | Boart Longyear | 1 | 124 | 3,633 |
| 19 | A S A P Pump & Well Service Inc. | 1 | 32 | 349 |
| 20 | Fred Anderson Drilling Inc. | 1 | 6 | 643 |
| 21 | Eagle Drilling Services LLC | 1 | 2 | 3,374 |
| 22 | Fundin Pump & Well Service | 1 | 2 | 62 |
| 23 | West Coast Pump & Well Works | 1 | 1 | 96 |
| 24 | Nevada Webber Drilling Inc. | 1 | 1 | 74 |
| 25 | Ogden Bros Drilling | — | 346 | 349 |
| 26 | W M Blain | — | 239 | 354 |
| 27 | W M Blain Well Drilling & Pumps | — | 215 | 904 |
| 28 | Ogden Well Drilling | — | 197 | 217 |
| 29 | Edmund Miller Drilling Co. | — | 174 | 218 |
| 30 | Edmund Miller | — | 154 | 228 |
| 31 | Aqua Drilling & Well Service Inc. | — | 145 | 2,675 |
| 32 | Humboldt Drilling & Pump Co. | — | 131 | 1,494 |
| 33 | Ace Drilling & Development | — | 116 | 204 |
| 34 | Enloe Drilling Co. | — | 109 | 597 |
| 35 | Emdlco Inc. | — | 99 | 179 |
| 36 | A & H Pump Co. | — | 79 | 662 |
| 37 | Capitol City Well Drilling And Pumps | — | 79 | 400 |
| 38 | Sierra Pump & Drilling | — | 69 | 294 |
| 39 | Nevada Drilling Inc. | — | 66 | 547 |
| 40 | Vernon Cannon JR | — | 65 | 176 |
| 41 | Edmund A Miller | — | 65 | 100 |
| 42 | Hydro Resources Nevada Inc. | — | 54 | 459 |
| 43 | A & B Contracrors | — | 53 | 70 |
| 44 | Thompson Drilling Co. Inc. | — | 52 | 1,080 |
| 45 | W D C Exploration & Wells | — | 47 | 1,910 |
| 46 | Nevada Pump & Drilling | — | 47 | 177 |
| 47 | Mckay Drilling Inc. | — | 46 | 1,420 |
| 48 | Blain Well Drilling | — | 46 | 114 |
| 49 | Sargent Irrigation Inc. | — | 40 | 429 |
| 50 | W E Blain | — | 34 | 299 |
| 51 | Marcin Drilling Company | — | 34 | 238 |
| 52 | R N Powell | — | 33 | 39 |
| 53 | Evans Bros Drilling Co. | — | 33 | 33 |
| 54 | Labrum Well Drilling | — | 32 | 82 |
| 55 | Harlan D Andresen | — | 31 | 446 |
| 56 | W L Mcdonald And Co. Inc. | — | 29 | 815 |
| 57 | George E Whatley | — | 29 | 30 |
| 58 | Haz-Tech Drilling Inc. | — | 28 | 830 |
| 59 | A & B Contractors | — | 27 | 274 |
| 60 | Eklund Drilling Co. Inc. | — | 26 | 1,580 |
| 61 | Lang Exploratory Drilling | — | 26 | 1,532 |
| 62 | Mel Meyer | — | 25 | 258 |
| 63 | Harvey Meyer | — | 25 | 214 |
| 64 | W F Tilton | — | 25 | 36 |
| 65 | Vernon K Cannon JR Water Well | — | 25 | 30 |
| 66 | Barnes Well Drilling | — | 24 | 35 |
| 67 | Woytek Drilling Co. | — | 23 | 331 |
| 68 | Ace Pump Sales & Service | — | 23 | 57 |
| 69 | Eddco Exploration Inc. | — | 21 | 320 |
| 70 | Jim House & Sons Drilling | — | 21 | 99 |
| 71 | Farris Drilling | — | 19 | 295 |
| 72 | Inland Pacific Drilling Co. Inc. | — | 19 | 36 |
| 73 | Kawchack Pump And Well Inc. | — | 17 | 544 |
| 74 | E D D C O Exploration Inc. | — | 17 | 194 |
| 75 | Nevada Pump Service | — | 17 | 41 |
| 76 | Wayne Drilling Inc. | — | 15 | 2,457 |
| 77 | Water Development Corp (The) | — | 15 | 609 |
| 78 | Paul Williams | — | 15 | 253 |
| 79 | Gregg Drilling & Testing Inc. | — | 14 | 382 |
| 80 | Burgess & Rohe Drilling Co. | — | 14 | 114 |
| 81 | National Ewp Inc. | — | 13 | 2,155 |
| 82 | Oasis Drilling Inc. | — | 13 | 113 |
| 83 | Allen Drilling Inc. | — | 12 | 5,330 |
| 84 | Meyer Drilling Co. Inc. | — | 12 | 208 |
| 85 | West Hazmat Drilling Corp | — | 12 | 195 |
| 86 | Reno Pump & Supply Co. | — | 10 | 162 |
| 87 | Marcin & Sons Drilling | — | 10 | 63 |
| 88 | Kawchack Drilling Inc. | — | 9 | 771 |
| 89 | Sage Brothers Drilling Co. Inc. | — | 9 | 178 |
| 90 | Andresen Drilling | — | 9 | 86 |
| 91 | Hackworth Drilling Inc. | — | 8 | 2,790 |
| 92 | Christiansen Drilling Inc. | — | 8 | 521 |
| 93 | Aqua Drilling & Well Service I | — | 8 | 225 |
| 94 | Burroughs OF Nevada | — | 8 | 142 |
| 95 | Sierra Nevada Drilling & Pump LLC | — | 8 | 92 |
| 96 | Bob Meyer | — | 8 | 56 |
| 97 | Resonantsonic International Inc. | — | 8 | 49 |
| 98 | American Drilling & Pump Service | — | 7 | 172 |
| 99 | Humbolt Drilling & Pump Co. Inc. | — | 7 | 40 |
| 100 | B & B Drilling Co. Inc. | — | 6 | 269 |
| 101 | American Drilling Co. | — | 6 | 60 |
| 102 | Warren W Overholser | — | 6 | 27 |
| 103 | Armstrong Bros | — | 5 | 401 |
| 104 | J B Reynolds | — | 5 | 343 |
| 105 | Boart Longyear Nevada | — | 5 | 329 |
| 106 | Glenn Pump And Drilling | — | 5 | 161 |
| 107 | Paul Williams & Sons | — | 5 | 158 |
| 108 | Fred Erb | — | 5 | 145 |
| 109 | Beylik Drilling Inc. | — | 5 | 131 |
| 110 | J N Pitcher Company | — | 5 | 121 |
| 111 | Robertson Eng & Drill | — | 5 | 47 |
| 112 | Points West Drilling | — | 5 | 31 |
| 113 | Miller & Sons Drilling Co. | — | 4 | 195 |
| 114 | Western Strata Exploration Inc. | — | 4 | 182 |
| 115 | Levy Matthews & Son | — | 4 | 162 |
| 116 | John Champion | — | 4 | 143 |
| 117 | Lew Burgess | — | 4 | 59 |
| 118 | Stretchs Exploration Inc. | — | 4 | 52 |
| 119 | Riverside Electric Motor & Pump | — | 4 | 27 |
| 120 | Bruce Robinson Drilling Co. | — | 3 | 326 |
| 121 | W W Welshenbaugh | — | 3 | 138 |
| 122 | Pete Anderson | — | 3 | 136 |
| 123 | Patrick H Thompson | — | 3 | 115 |
| 124 | Smith Pulati Inc. | — | 3 | 88 |
| 125 | Irving R Tonnesen | — | 3 | 78 |
| 126 | Drilling Research Company | — | 3 | 72 |
| 127 | Suchta Well Drlg | — | 3 | 66 |
| 128 | Charles Sargent Irrigation Inc. | — | 3 | 66 |
| 129 | Potter Drilling Co. | — | 3 | 51 |
| 130 | Alcore Drilling | — | 3 | 50 |
| 131 | G W Petersen & Co. | — | 3 | 46 |
| 132 | Diamond Well Drilling Co. | — | 3 | 34 |
| 133 | Zim Irrigation & Bakersfield Well & Pump Co. | — | 3 | 31 |
| 134 | Wayne Burroughs | — | 3 | 30 |
| 135 | H & M Drilling | — | 2 | 97 |
| 136 | Steve Kawchack | — | 2 | 146 |
| 137 | Harvey & Bob Meyer | — | 2 | 117 |
| 138 | Water-Rite Well Drilling | — | 2 | 111 |
| 139 | Valley Pump Company | — | 2 | 109 |
| 140 | Brinkerhoff Pump & Drilling Co. Inc. | — | 2 | 101 |
| 141 | P C Exploration Inc. | — | 2 | 85 |
| 142 | Dave Mcninch | — | 2 | 82 |
| 143 | A O Large | — | 2 | 78 |
| 144 | Austin W Graham | — | 2 | 66 |
| 145 | Layne Texas Co. | — | 2 | 32 |
| 146 | Nevada Pump & Irrigation Co. | — | 2 | 26 |
| 147 | J Champion | — | 2 | 26 |
| 148 | Fertig Drilling Co. | — | 1 | 762 |
| 149 | Mackay Pump & Geothermal Inc. | — | 1 | 193 |
| 150 | E J Thomas | — | 1 | 173 |
| 151 | Cascade Drilling Inc. California | — | 1 | 113 |
| 152 | Jesse J Harrison | — | 1 | 101 |
| 153 | Boyles Bros Drilling | — | 1 | 84 |
| 154 | Pezonella Associates Inc. | — | 1 | 73 |
| 155 | Energy Exploration Drilling | — | 1 | 69 |
| 156 | Layne Environmental | — | 1 | 61 |
| 157 | Paul N Pflimlin | — | 1 | 53 |
| 158 | Andrew J Foster | — | 1 | 46 |
| 159 | Hoover & Sons Construction Co. | — | 1 | 46 |
| 160 | Hilyard Drilling Co. | — | 1 | 43 |
| 161 | James House Well Drilling | — | 1 | 38 |
| 162 | Pre-Cambrian Drilling Co. | — | 1 | 34 |
| 163 | Brown Bros Well Drilling | — | 1 | 32 |
| 164 | Castlio Drilling Co. | — | 1 | 32 |
| 165 | J W Biffle | — | 1 | 31 |
| 166 | James House | — | 1 | 30 |
| 167 | M Artlip | — | 1 | 30 |
| 168 | Russell C Kabisch | — | 1 | 27 |