| 1 | Bapst Inc. | 376 | 907 | 5,348 |
| 2 | J E Wright Well Drilling | 75 | 291 | 1,126 |
| 3 | Central Soft Water | 42 | 42 | 1,489 |
| 4 | Stage Inc. (Dba R C Barry) | 23 | 40 | 1,117 |
| 5 | Cantrell Well Drilling | 23 | 33 | 477 |
| 6 | Blair Drilling & Pump Serv LLC | 22 | 75 | 593 |
| 7 | Havens & Sons Drilling | 20 | 75 | 516 |
| 8 | Seismic Drilling Co. Inc. | 8 | 10 | 5,783 |
| 9 | Smith's Well Drilling LLC | 7 | 53 | 1,966 |
| 10 | Warthman Drilling Inc. | 6 | 16 | 4,411 |
| 11 | Moody's OF Dayton Inc. | 6 | 7 | 361 |
| 12 | Jamison Well Drilling Inc. | 3 | 3 | 11,219 |
| 13 | Jackson Well Services Inc. | 3 | 3 | 93 |
| 14 | Keen Well And Pump | 2 | 11 | 10,231 |
| 15 | K & B Well Drilling Co. | 2 | 2 | 1,837 |
| 16 | Gobel Well Drilling | 1 | 316 | 1,184 |
| 17 | Crabtree Drilling | 1 | 7 | 4,742 |
| 18 | National Water Services (Lanc) | 1 | 6 | 91 |
| 19 | Eaton Well Drilling Inc. | 1 | 3 | 1,309 |
| 20 | Hamilton & Sons Well Drilling | 1 | 1 | 3,862 |
| 21 | A & H Bevard Water Well Service | 1 | 1 | 44 |
| 22 | Layne Christensen Co. | 1 | 1 | 33 |
| 23 | Paul W Wright Drilling | — | 480 | 1,236 |
| 24 | Wright (Merle) Well Drilling | — | 356 | 1,044 |
| 25 | Buckeye Valley Well Drilling | — | 341 | 721 |
| 26 | Christy (Joe) | — | 297 | 692 |
| 27 | R C Barry Company | — | 210 | 3,818 |
| 28 | Noggle (Harley) | — | 170 | 186 |
| 29 | Short Drilling | — | 154 | 1,580 |
| 30 | C & P Well Drilling | — | 120 | 151 |
| 31 | Agua Well Drilling Inc. | — | 111 | 449 |
| 32 | Frazier Drilling | — | 111 | 376 |
| 33 | Whitesed (D L) & Son Drilling | — | 96 | 145 |
| 34 | Lewis Bros | — | 83 | 206 |
| 35 | Short Brothers | — | 80 | 374 |
| 36 | Garnes Water Wells | — | 76 | 213 |
| 37 | Wright Well Drilling | — | 68 | 366 |
| 38 | Smith (R) Water Well Drilling | — | 59 | 190 |
| 39 | Edmonds Water Well Drilling | — | 57 | 308 |
| 40 | Peacock Well Drilling | — | 52 | 265 |
| 41 | Bethel Water Well Drill | — | 45 | 762 |
| 42 | Spung's Well Drilling | — | 44 | 80 |
| 43 | Water Boy Drilling | — | 41 | 47 |
| 44 | Barry (R C) | — | 38 | 1,392 |
| 45 | Shorts (John) Well Drilling | — | 34 | 927 |
| 46 | New Rome Pump Service | — | 33 | 682 |
| 47 | Ryan (A F) | — | 32 | 653 |
| 48 | Professional Water Well Systems | — | 24 | 624 |
| 49 | Sprowls Drilling Co. | — | 22 | 1,348 |
| 50 | Davis Drilling | — | 21 | 415 |
| 51 | Lewis (Sam) Well Drilling | — | 21 | 310 |
| 52 | Vickroy Well Drilling | — | 19 | 260 |
| 53 | Riddle Well Drilling | — | 16 | 682 |
| 54 | Beinhower Bros Drilling Co. | — | 15 | 3,766 |
| 55 | Plummer & Sons | — | 14 | 3,365 |
| 56 | Ruby (Stan) Well Drilling | — | 14 | 750 |
| 57 | Goodwin (R H) | — | 14 | 164 |
| 58 | Thomas (Grant) | — | 14 | 153 |
| 59 | Mccoy Well Drilling Service | — | 12 | 253 |
| 60 | Combs (John O) | — | 12 | 74 |
| 61 | Edwards Drilling & Excavating | — | 12 | 43 |
| 62 | Plummer Brothers | — | 11 | 863 |
| 63 | Underhill Water Well Drilling | — | 11 | 451 |
| 64 | Central Ohio Drilling | — | 11 | 169 |
| 65 | Quinter Well Drilling LLC | — | 10 | 12,078 |
| 66 | Smith & Sons | — | 9 | 448 |
| 67 | Bauer Well Drilling | — | 9 | 393 |
| 68 | Layne Ohio (Layne Christensen) | — | 9 | 346 |
| 69 | Wright (Larry) Drilling | — | 9 | 293 |
| 70 | Underhill (Charles A SR) | — | 9 | 195 |
| 71 | Estep Water Well Drilling | — | 9 | 181 |
| 72 | Mcbride Drilling Co. | — | 8 | 744 |
| 73 | Hart's Water Well Drilling | — | 8 | 118 |
| 74 | R & J Well Drilling | — | 8 | 101 |
| 75 | Underhill Well & Pump Co. LLC | — | 7 | 519 |
| 76 | Eaton Well & Pump | — | 7 | 3,329 |
| 77 | Gillum Well Drilling | — | 7 | 625 |
| 78 | Casey's Well Drilling | — | 7 | 312 |
| 79 | Jackson & Sons Drilling & Pump Co. | — | 6 | 3,154 |
| 80 | Accurate Well Drilling | — | 6 | 111 |
| 81 | Carter (Elam) | — | 5 | 456 |
| 82 | Reynolds Inc. | — | 5 | 186 |
| 83 | Ryan Well Drilling | — | 5 | 46 |
| 84 | Bryan (Derral F) | — | 5 | 44 |
| 85 | Able Well & Pump | — | 4 | 1,093 |
| 86 | Robert E Smith Drilling | — | 4 | 2,483 |
| 87 | Poling Drilling | — | 4 | 485 |
| 88 | H E Johnson Well Drilling | — | 4 | 270 |
| 89 | Brown's Well Drilling | — | 4 | 205 |
| 90 | Stewart Well Drilling | — | 4 | 177 |
| 91 | Mccoy Drilling & Supply Co. | — | 4 | 100 |
| 92 | R & J Well Drilling (Randy) | — | 4 | 94 |
| 93 | Bushong Drilling | — | 3 | 852 |
| 94 | Chenoweth Well Drilling | — | 3 | 610 |
| 95 | Alliance Water Well Inc. | — | 3 | 458 |
| 96 | Trefz (Rodney H) | — | 3 | 310 |
| 97 | G M Baker & Son | — | 3 | 259 |
| 98 | Charles Allen Water Well Drilling | — | 3 | 235 |
| 99 | Cave Well Drilling | — | 3 | 204 |
| 100 | Lehman Well Drilling | — | 3 | 80 |
| 101 | Notestone Well Drilling | — | 3 | 62 |
| 102 | Mullins Well Drilling | — | 3 | 60 |
| 103 | Davis (Carl) | — | 3 | 34 |
| 104 | Dean's Drilling | — | 2 | 1,010 |
| 105 | Cooper Water Well Drilling | — | 2 | 2,153 |
| 106 | Valley Well & Pump Service Inc. | — | 2 | 1,409 |
| 107 | Gregory Well Drilling | — | 2 | 53 |
| 108 | Vernon Gregory Well Drilling | — | 2 | 1,201 |
| 109 | Plummer-Mcdannald Drilling | — | 2 | 1,333 |
| 110 | Meyer Well Drilling | — | 2 | 758 |
| 111 | Dan Allen Well Drilling | — | 2 | 493 |
| 112 | Aqua Drilling Inc. | — | 2 | 430 |
| 113 | Harley (V J) And Son | — | 2 | 236 |
| 114 | Brown Drilling | — | 2 | 152 |
| 115 | Sells Well & Water Supply | — | 2 | 97 |
| 116 | Dingess (Jay) Well Drilling | — | 2 | 87 |
| 117 | Welch & Son | — | 2 | 78 |
| 118 | Lowery (Harold R) | — | 2 | 77 |
| 119 | Benedict Well Drilling | — | 2 | 58 |
| 120 | Johnston (H A) | — | 2 | 41 |
| 121 | Myers (Russell E) | — | 2 | 37 |
| 122 | Smith (J M) Water Well Drilling | — | 2 | 30 |
| 123 | Terry & Sons Water Well Drilling | — | 2 | 29 |
| 124 | Flinner Drilling Inc. | — | 1 | 8,459 |
| 125 | A & G Well Drilling Inc. | — | 1 | 1,010 |
| 126 | Minnix Water Systems Inc. | — | 1 | 295 |
| 127 | Eaton (Donald) | — | 1 | 1,019 |
| 128 | Ross Water Well Drilling | — | 1 | 544 |
| 129 | Conner Well Drilling | — | 1 | 460 |
| 130 | Peck (Carl) Well Drilling | — | 1 | 412 |
| 131 | J & O Drilling | — | 1 | 399 |
| 132 | Robert Davis Well Drilling | — | 1 | 377 |
| 133 | Bushong (Charles Burton) | — | 1 | 295 |
| 134 | Cook Drilling | — | 1 | 251 |
| 135 | Kautz Well Drilling | — | 1 | 251 |
| 136 | Blauser (Grover C) | — | 1 | 247 |
| 137 | Scott Well Drilling | — | 1 | 187 |
| 138 | Odnr (Water) | — | 1 | 185 |
| 139 | Harley (R S) | — | 1 | 164 |
| 140 | Rogers & Sons Drilling | — | 1 | 153 |
| 141 | Shorts Water Well Drilling | — | 1 | 138 |
| 142 | Coffey Well Drilling | — | 1 | 124 |
| 143 | Wood Drilling | — | 1 | 112 |
| 144 | Adams (J E) | — | 1 | 109 |
| 145 | Davis (J C) | — | 1 | 73 |
| 146 | Notestine Drilling | — | 1 | 70 |
| 147 | Ohio Rotary Drilling Co. Inc. | — | 1 | 66 |
| 148 | Underhill (James) | — | 1 | 58 |
| 149 | Bethel (James) | — | 1 | 48 |
| 150 | Robinson (Homer) | — | 1 | 36 |
| 151 | Gobel (Roger L) | — | 1 | 35 |
| 152 | Wagner (Herbert W) & Son | — | 1 | 33 |
| 153 | J D Short Well Drilling | — | 1 | 30 |
| 154 | Summers (Kenneth) | — | 1 | 30 |
| 155 | Aqua Spring Well Drilling | — | 1 | 28 |