| 1 | Bapst Inc. | 777 | 1,431 | 5,348 |
| 2 | Warthman Drilling Inc. | 612 | 2,347 | 4,411 |
| 3 | Mount Water Well Drilling | 150 | 297 | 3,547 |
| 4 | Keen Well And Pump | 94 | 294 | 10,231 |
| 5 | Smith's Well Drilling LLC | 85 | 160 | 1,966 |
| 6 | J E Wright Well Drilling | 68 | 321 | 1,126 |
| 7 | Blair Drilling & Pump Serv LLC | 55 | 152 | 593 |
| 8 | Central Soft Water | 47 | 48 | 1,489 |
| 9 | Cantrell Well Drilling | 29 | 45 | 477 |
| 10 | Hurley's Water Well Drilling | 25 | 39 | 802 |
| 11 | B Mowrey Drilling LLC | 23 | 25 | 89 |
| 12 | Beinhower Bros Drilling Co. | 14 | 92 | 3,766 |
| 13 | Jamison Well Drilling Inc. | 13 | 15 | 11,219 |
| 14 | Stage Inc. (Dba R C Barry) | 10 | 90 | 1,117 |
| 15 | K & B Well Drilling Co. | 8 | 10 | 1,837 |
| 16 | Moody's OF Dayton Inc. | 8 | 8 | 361 |
| 17 | A & H Bevard Water Well Service | 7 | 7 | 44 |
| 18 | Dean's Drilling | 5 | 38 | 1,010 |
| 19 | Underhill Well & Pump Co. LLC | 4 | 5 | 519 |
| 20 | J Miller & Sons Drilling | 3 | 3 | 1,124 |
| 21 | Jackson Well Services Inc. | 3 | 3 | 93 |
| 22 | Eaton Well Drilling Inc. | 2 | 9 | 1,309 |
| 23 | Professional Water Well Systems | 1 | 364 | 624 |
| 24 | Aqua Drilling Inc. | 1 | 28 | 430 |
| 25 | Seismic Drilling Co. Inc. | 1 | 3 | 5,783 |
| 26 | Bushong Drilling | 1 | 3 | 852 |
| 27 | Short Drilling | — | 999 | 1,580 |
| 28 | Mcbride Drilling Co. | — | 680 | 744 |
| 29 | Gobel Well Drilling | — | 628 | 1,184 |
| 30 | R C Barry Company | — | 453 | 3,818 |
| 31 | Kellenbarger & Sons Drilling | — | 353 | 412 |
| 32 | Christy (Joe) | — | 352 | 692 |
| 33 | Ross Water Well Drilling | — | 345 | 544 |
| 34 | Alliance Water Well Inc. | — | 337 | 458 |
| 35 | Bauer Well Drilling | — | 272 | 393 |
| 36 | Poole's Water Well Drilling | — | 263 | 293 |
| 37 | Poling Drilling | — | 262 | 485 |
| 38 | Casey's Well Drilling | — | 261 | 312 |
| 39 | Barry (R C) | — | 238 | 1,392 |
| 40 | Leindecker Well Drilling | — | 215 | 796 |
| 41 | Buckeye Valley Well Drilling | — | 194 | 721 |
| 42 | Blauser (Grover C) | — | 193 | 247 |
| 43 | Lancaster Well Service | — | 163 | 179 |
| 44 | Stewart Well Drilling | — | 139 | 177 |
| 45 | Thomas (Grant) | — | 129 | 153 |
| 46 | Short Brothers | — | 122 | 374 |
| 47 | Dan Allen Well Drilling | — | 116 | 493 |
| 48 | Cave Well Drilling | — | 115 | 204 |
| 49 | Miller (Clay E) | — | 109 | 122 |
| 50 | Sprowls Drilling Co. | — | 88 | 1,348 |
| 51 | Vollmuth (Raymond A) | — | 79 | 946 |
| 52 | Harvey (James A) | — | 76 | 95 |
| 53 | Plummer & Sons | — | 73 | 3,365 |
| 54 | Vickroy Well Drilling | — | 51 | 260 |
| 55 | B & B Well Drilling | — | 45 | 134 |
| 56 | Riser (H E) | — | 44 | 56 |
| 57 | Lewis (Sam) Well Drilling | — | 42 | 310 |
| 58 | Ryan (A F) | — | 41 | 653 |
| 59 | Quinter Well Drilling LLC | — | 37 | 12,078 |
| 60 | Jackson & Sons Drilling & Pump Co. | — | 37 | 3,154 |
| 61 | Goodwin (R H) | — | 35 | 164 |
| 62 | Agua Well Drilling Inc. | — | 34 | 449 |
| 63 | Pickerington Well Drilling | — | 33 | 51 |
| 64 | Scheideggers Pump Service | — | 32 | 76 |
| 65 | Whitesed (D L) & Son Drilling | — | 30 | 145 |
| 66 | Phillips Well Drilling | — | 27 | 338 |
| 67 | Combs (John O) | — | 27 | 74 |
| 68 | Paul W Wright Drilling | — | 26 | 1,236 |
| 69 | Robert Davis Well Drilling | — | 26 | 377 |
| 70 | Charles Allen Water Well Drilling | — | 26 | 235 |
| 71 | Phillips Water Well Drilling | — | 26 | 90 |
| 72 | Davis Drilling | — | 24 | 415 |
| 73 | G M Baker & Son | — | 24 | 259 |
| 74 | Smith (R) Water Well Drilling | — | 23 | 190 |
| 75 | Melick (W O) | — | 23 | 124 |
| 76 | Spung's Well Drilling | — | 23 | 80 |
| 77 | Wagner (Herbert W) & Son | — | 23 | 33 |
| 78 | Roof (Richard) | — | 23 | 25 |
| 79 | Lewis Bros | — | 22 | 206 |
| 80 | Phillips Drilling Co. | — | 21 | 141 |
| 81 | Wright (Merle) Well Drilling | — | 21 | 1,044 |
| 82 | New Rome Pump Service | — | 21 | 682 |
| 83 | Pataskala Well Drilling | — | 21 | 362 |
| 84 | Peck (Carl) Well Drilling | — | 20 | 412 |
| 85 | C & P Well Drilling | — | 19 | 151 |
| 86 | Harley (V J) And Son | — | 18 | 236 |
| 87 | Welch & Son | — | 18 | 78 |
| 88 | Riser Frank Drilling | — | 17 | 42 |
| 89 | Helser & Sons Water Well Drilling | — | 16 | 121 |
| 90 | Mullins Well Drilling | — | 16 | 60 |
| 91 | Frazier Drilling | — | 14 | 376 |
| 92 | Shamrock Drilling | — | 13 | 315 |
| 93 | Kautz Well Drilling | — | 13 | 251 |
| 94 | Miller (Floyd) Well Drilling | — | 13 | 126 |
| 95 | National Water Services (Lanc) | — | 12 | 91 |
| 96 | Knisley Well Drilling | — | 11 | 202 |
| 97 | Terry & Sons Water Well Drilling | — | 11 | 29 |
| 98 | Sever Water Well Drilling | — | 10 | 4,250 |
| 99 | Danny's Water Well Drilling | — | 10 | 379 |
| 100 | Wright Well Drilling | — | 10 | 366 |
| 101 | Sprowls Drilling Co. (Groveport) | — | 10 | 84 |
| 102 | Myers (Russell E) | — | 10 | 37 |
| 103 | Cooper Water Well Drilling | — | 9 | 2,153 |
| 104 | J & O Drilling | — | 9 | 399 |
| 105 | Peacock Well Drilling | — | 9 | 265 |
| 106 | Water Systems Inc. | — | 9 | 196 |
| 107 | Plummer-Mcdannald Drilling | — | 8 | 1,333 |
| 108 | Edmonds Water Well Drilling | — | 8 | 308 |
| 109 | Lewis & Son Well Drilling | — | 8 | 29 |
| 110 | Brown Drilling | — | 7 | 152 |
| 111 | Notestone Well Drilling | — | 7 | 62 |
| 112 | Dewitt Drilling Co. | — | 6 | 600 |
| 113 | Odnr (Water) | — | 6 | 185 |
| 114 | Dingess (Jay) Well Drilling | — | 6 | 87 |
| 115 | Tuthill (Russell E) | — | 6 | 45 |
| 116 | Gobel (Roger L) | — | 6 | 35 |
| 117 | Harpest (Ron) Well Drilling | — | 5 | 377 |
| 118 | Layne Ohio (Layne Christensen) | — | 5 | 346 |
| 119 | Underhill Water Well Drilling | — | 4 | 451 |
| 120 | May (H J) | — | 4 | 338 |
| 121 | Reynolds Inc. | — | 4 | 186 |
| 122 | Allen Water Well Drilling | — | 4 | 96 |
| 123 | Notestine Drilling | — | 4 | 70 |
| 124 | Miller Drilling | — | 4 | 59 |
| 125 | Moran (John T) | — | 4 | 53 |
| 126 | Keaton Drilling | — | 4 | 39 |
| 127 | Campbell (Robert) | — | 4 | 30 |
| 128 | H E Peck Drilling | — | 3 | 376 |
| 129 | Swingle (Donald) Well Drilling | — | 3 | 364 |
| 130 | Underhill (Charles A SR) | — | 3 | 195 |
| 131 | Noggle (Harley) | — | 3 | 186 |
| 132 | R & J Well Drilling | — | 3 | 101 |
| 133 | Mcgee Drilling | — | 3 | 56 |
| 134 | Water Boy Drilling | — | 3 | 47 |
| 135 | Dingess (Mansfield) Well Drilling | — | 3 | 35 |
| 136 | Crabtree Drilling | — | 2 | 4,742 |
| 137 | Havens & Sons Drilling | — | 2 | 516 |
| 138 | Gard's Water Well Drilling | — | 2 | 160 |
| 139 | Wilson (Jim) Well Drilling | — | 2 | 1,464 |
| 140 | Garnes Water Wells | — | 2 | 213 |
| 141 | Estep Water Well Drilling | — | 2 | 181 |
| 142 | Mike Herr Well & Pump | — | 2 | 179 |
| 143 | Mike's Water Well Drilling | — | 2 | 175 |
| 144 | Michel Water Well Drilling | — | 2 | 141 |
| 145 | Doug Frost Drilling | — | 2 | 118 |
| 146 | C & K Well Drilling | — | 2 | 113 |
| 147 | FW Eikleberry & Son | — | 2 | 111 |
| 148 | R & J Well Drilling (Randy) | — | 2 | 94 |
| 149 | Silver Fleet Drilling | — | 2 | 61 |
| 150 | Miller (O E) | — | 2 | 57 |
| 151 | Bryan (Derral F) | — | 2 | 44 |
| 152 | Edwards Drilling & Excavating | — | 2 | 43 |
| 153 | Moran's Water Well Service | — | 2 | 42 |
| 154 | R & C Drilling Co. | — | 2 | 34 |
| 155 | Flinner Drilling Inc. | — | 1 | 8,459 |
| 156 | Able Well & Pump | — | 1 | 1,093 |
| 157 | Fredebaugh Well Drilling | — | 1 | 5,477 |
| 158 | A & G Well Drilling Inc. | — | 1 | 1,010 |
| 159 | Minnix Water Systems Inc. | — | 1 | 295 |
| 160 | Vernon Gregory Well Drilling | — | 1 | 1,201 |
| 161 | Ohio Drilling Company | — | 1 | 409 |
| 162 | Eaton Well & Pump | — | 1 | 3,329 |
| 163 | Thomas Well Drilling | — | 1 | 1,244 |
| 164 | Plummer Brothers | — | 1 | 863 |
| 165 | Smith Drilling Contractors | — | 1 | 609 |
| 166 | Arthur E Plummer & Son | — | 1 | 560 |
| 167 | Ellis & Morris Drilling Co. | — | 1 | 539 |
| 168 | J R Wells Water Well Drilling | — | 1 | 520 |
| 169 | Treadway (V L) | — | 1 | 462 |
| 170 | Smith (Gerald) Well Drilling | — | 1 | 456 |
| 171 | Snedden (E J) Well Drilling | — | 1 | 456 |
| 172 | Frost Drilling | — | 1 | 386 |
| 173 | Fraley Well Drilling | — | 1 | 362 |
| 174 | Lupher Drilling | — | 1 | 295 |
| 175 | Earl Davis Well Drilling | — | 1 | 289 |
| 176 | Treadway (Gerald) Well Drilling | — | 1 | 225 |
| 177 | J & B Wells | — | 1 | 223 |
| 178 | Markle Drilling | — | 1 | 199 |
| 179 | Moats Drilling Co. | — | 1 | 196 |
| 180 | Price Drilling | — | 1 | 184 |
| 181 | Hoover Well Drilling | — | 1 | 173 |
| 182 | Lykins (Herbert) | — | 1 | 146 |
| 183 | Spaulding (Raymond) | — | 1 | 142 |
| 184 | Miller (John) Well Drilling | — | 1 | 121 |
| 185 | Parsons (Lovell M) | — | 1 | 118 |
| 186 | Hart's Water Well Drilling | — | 1 | 118 |
| 187 | Mark Hull Drilling | — | 1 | 117 |
| 188 | H & A Water Well Drlg & Pump Svc | — | 1 | 106 |
| 189 | Edwards Well Drilling | — | 1 | 87 |
| 190 | Lowery (Harold R) | — | 1 | 77 |
| 191 | T C Drilling | — | 1 | 70 |
| 192 | Fouts Drilling | — | 1 | 61 |
| 193 | Blanton Supply | — | 1 | 61 |
| 194 | Lehman & Lynn | — | 1 | 59 |
| 195 | Bill's Bit Service | — | 1 | 47 |
| 196 | C & L Water Well Drilling | — | 1 | 47 |
| 197 | Bevard (Larry) Well Drilling | — | 1 | 43 |
| 198 | Hamm (Everett G) | — | 1 | 33 |
| 199 | Ranger Drilling | — | 1 | 31 |
| 200 | J D Short Well Drilling | — | 1 | 30 |
| 201 | Smith (J M) Water Well Drilling | — | 1 | 30 |
| 202 | Snook Well Drilling Company | — | 1 | 30 |
| 203 | Triple J Drilling (Newark) | — | 1 | 27 |
| 204 | Sand Run Drilling Co. | — | 1 | 25 |