| 1 | Dillan Well Drilling Inc. | 458 | 1,181 | 2,861 |
| 2 | Persing Water Well Drilling | 77 | 1,290 | 1,373 |
| 3 | Davidson Well Drilling | 48 | 254 | 3,177 |
| 4 | Quality Water Systems | 38 | 735 | 2,919 |
| 5 | Bell Well Drilling Inc. | 31 | 1,191 | 2,095 |
| 6 | Carroll's Well Drilling | 20 | 80 | 2,028 |
| 7 | Robert E Burrows Well Drilling | 17 | 29 | 1,615 |
| 8 | Jamison Well Drilling Inc. | 15 | 25 | 11,219 |
| 9 | Southwind Drilling Company | 14 | 58 | 4,282 |
| 10 | E R Eppinger Drilling | 5 | 167 | 206 |
| 11 | Book & Proch Well Drilling Inc. | 4 | 20 | 30 |
| 12 | Greg Rogers Enterprises | 4 | 10 | 446 |
| 13 | Chatfield Drilling Inc. | 4 | 4 | 49 |
| 14 | Flinner Drilling Inc. | 3 | 15 | 8,459 |
| 15 | Mohr Well Drilling Inc. | 3 | 6 | 707 |
| 16 | Central Soft Water | 3 | 3 | 1,489 |
| 17 | Mckay & Gould Drilling Inc. | 2 | 473 | 1,993 |
| 18 | Berry (Gary) Well Drilling | 2 | 104 | 150 |
| 19 | Keen Well And Pump | 2 | 2 | 10,231 |
| 20 | Jackson Well Services Inc. | 2 | 2 | 93 |
| 21 | Parker Bros Well Drill OF Penn-Ohio | 1 | 68 | 417 |
| 22 | Don Burrows Well Drilling | 1 | 16 | 514 |
| 23 | Aces Well Service | 1 | 1 | 35 |
| 24 | North Eastern Drilling | — | 546 | 568 |
| 25 | Kerr & Maxwell | — | 501 | 605 |
| 26 | Ingram (Kendall) | — | 487 | 592 |
| 27 | Leyden Management | — | 471 | 525 |
| 28 | Smith Drilling Co. Inc. | — | 362 | 988 |
| 29 | Economy Well Drillers | — | 316 | 1,188 |
| 30 | Lininger Drilling & Pumps Inc. | — | 223 | 491 |
| 31 | Berry (Elwyn) Well Drilling | — | 213 | 216 |
| 32 | Slaven Robert & Son | — | 162 | 194 |
| 33 | Mcdonald (T G) & Son | — | 154 | 154 |
| 34 | Kisner (J H) | — | 136 | 177 |
| 35 | Ross (Latta) | — | 129 | 268 |
| 36 | Scott Drilling | — | 118 | 135 |
| 37 | Readshaw Well Drilling | — | 109 | 422 |
| 38 | Palmer Drilling Inc. | — | 87 | 880 |
| 39 | Lynch (E J) | — | 83 | 86 |
| 40 | Walsh Pump & Supply | — | 78 | 92 |
| 41 | Evans (Arthur) | — | 66 | 76 |
| 42 | Horton Pump Service | — | 61 | 147 |
| 43 | Null Well Drilling | — | 60 | 67 |
| 44 | C E Burrows & Sons | — | 56 | 1,701 |
| 45 | Boorn Drilling Inc. | — | 48 | 195 |
| 46 | Evans Drilling | — | 48 | 66 |
| 47 | Weingart (E H) & Sons | — | 42 | 46 |
| 48 | Pittman (Carl F) | — | 41 | 315 |
| 49 | Kisner Drilling Co. | — | 40 | 186 |
| 50 | HD Sonic Drilling Inc. | — | 39 | 86 |
| 51 | Templeton Well Drilling | — | 34 | 1,364 |
| 52 | K & S Well Drilling | — | 34 | 161 |
| 53 | Hampson Drilling | — | 32 | 96 |
| 54 | Steele (Robert) | — | 30 | 67 |
| 55 | Stewart's Pump Shop | — | 30 | 54 |
| 56 | Suburban Pump Shop | — | 29 | 50 |
| 57 | Scott (Oakey) Well Drilling | — | 28 | 281 |
| 58 | Clingerman (L D) | — | 28 | 28 |
| 59 | Booksing Drilling | — | 24 | 28 |
| 60 | Western Reserve Drlg & Equip Co. | — | 24 | 26 |
| 61 | Streetsboro Sales & Service | — | 22 | 2,180 |
| 62 | Hupp Well & Pump Co. | — | 22 | 317 |
| 63 | Grim Water Systems | — | 21 | 71 |
| 64 | Sell (John) | — | 19 | 107 |
| 65 | Davidson Drilling | — | 19 | 77 |
| 66 | Miskimins (Homer) | — | 19 | 26 |
| 67 | Wareham Drilling | — | 17 | 238 |
| 68 | Tnt Water Well Inc. | — | 12 | 1,121 |
| 69 | Scott (R G) | — | 12 | 247 |
| 70 | Cope (H C) | — | 12 | 224 |
| 71 | Jackson & Sons Drilling & Pump Co. | — | 10 | 3,154 |
| 72 | Wilson (Jim) Well Drilling | — | 10 | 1,464 |
| 73 | Freed Water Well Drilling | — | 9 | 1,755 |
| 74 | Smith Drilling Contractors | — | 9 | 609 |
| 75 | Wolverton (Ken) Well Drilling | — | 7 | 221 |
| 76 | Brown's Well Drilling | — | 7 | 205 |
| 77 | Donamarc Water Systems Co. | — | 6 | 2,417 |
| 78 | Culver (Clyde) | — | 6 | 86 |
| 79 | Ohio Rotary Drilling Co. Inc. | — | 6 | 66 |
| 80 | James Westfall Well Drilling | — | 5 | 389 |
| 81 | Haines (A M) | — | 5 | 48 |
| 82 | Culver (Don) | — | 5 | 34 |
| 83 | Quinter Well Drilling LLC | — | 4 | 12,078 |
| 84 | Smith's Well Drilling LLC | — | 4 | 1,966 |
| 85 | S & S Well Drilling | — | 4 | 214 |
| 86 | Riddle (Robert) | — | 4 | 144 |
| 87 | H & H Drilling (Alliance) | — | 4 | 136 |
| 88 | Ferguson Drilling | — | 4 | 129 |
| 89 | Hudson (F E) | — | 4 | 46 |
| 90 | Walter's Well Drilling | — | 3 | 1,507 |
| 91 | A & G Well Drilling Inc. | — | 3 | 1,010 |
| 92 | Had Inc. | — | 3 | 783 |
| 93 | Quentin Neal Well Drilling | — | 3 | 491 |
| 94 | Mills (Dale N) | — | 3 | 317 |
| 95 | A & A Well Drilling | — | 3 | 237 |
| 96 | Mid-America Recovery Service | — | 3 | 208 |
| 97 | Mark Hull Drilling | — | 3 | 117 |
| 98 | Aultfather Charles Drilling | — | 3 | 105 |
| 99 | Ellsworth Well & Pump | — | 2 | 1,026 |
| 100 | Cooper Water Well Drilling | — | 2 | 2,153 |
| 101 | Speedy Drilling Co. | — | 2 | 2,142 |
| 102 | Bjaam Environmental Inc. | — | 2 | 156 |
| 103 | Patriot Drilling | — | 2 | 470 |
| 104 | Sprowls Drilling Co. | — | 2 | 1,348 |
| 105 | A W Smith Well Drilling | — | 2 | 1,041 |
| 106 | Ruby (Stan) Well Drilling | — | 2 | 750 |
| 107 | Pichan Well Drilling | — | 2 | 701 |
| 108 | Williams Water Well Drilling | — | 2 | 679 |
| 109 | Wilkes (Richard A) | — | 2 | 245 |
| 110 | Scott Well Drilling | — | 2 | 187 |
| 111 | Wade (R Leo) | — | 2 | 175 |
| 112 | Darby's Well Drilling | — | 2 | 154 |
| 113 | Carroll's Well & Pump Service | — | 2 | 127 |
| 114 | D & L Drilling LLC (Old) | — | 2 | 88 |
| 115 | Stillman Well Drilling | — | 2 | 79 |
| 116 | Belasco Drilling Inc. | — | 2 | 47 |
| 117 | Shanker Well Drilling | — | 2 | 42 |
| 118 | Hamilton & Sons Well Drilling | — | 1 | 3,862 |
| 119 | Denny Herr Well Drilling | — | 1 | 654 |
| 120 | Hall And Jenkins Well Drilling | — | 1 | 968 |
| 121 | Kaufman Well Drilling Inc. | — | 1 | 314 |
| 122 | Adams & Sons Pump Service Inc. | — | 1 | 169 |
| 123 | Griffith Drilling Co. | — | 1 | 854 |
| 124 | Davis Drilling | — | 1 | 415 |
| 125 | Kimball Well Drilling | — | 1 | 2,594 |
| 126 | Ohio Drilling Company | — | 1 | 409 |
| 127 | National Water Services (Lanc) | — | 1 | 91 |
| 128 | R G Stockert Drilling Co. | — | 1 | 3,130 |
| 129 | Mullet Drilling Company Inc. | — | 1 | 2,605 |
| 130 | Robert E Smith Drilling | — | 1 | 2,483 |
| 131 | Inman Well Drilling | — | 1 | 1,977 |
| 132 | W Barker & Sons Well Drilling | — | 1 | 1,072 |
| 133 | Fearon & Feller Inc. | — | 1 | 1,028 |
| 134 | Slanker Well Drilling | — | 1 | 794 |
| 135 | Wes Britenstine Well Drilling | — | 1 | 786 |
| 136 | Buckeye Valley Well Drilling | — | 1 | 721 |
| 137 | Stoffel Well Drilling | — | 1 | 707 |
| 138 | Jones Drilling | — | 1 | 631 |
| 139 | Lynch (Theodore) | — | 1 | 599 |
| 140 | Ross Water Well Drilling | — | 1 | 544 |
| 141 | Williams (Ronald) Drilling Co. | — | 1 | 540 |
| 142 | Ellis & Morris Drilling Co. | — | 1 | 539 |
| 143 | Culp Drilling Co. | — | 1 | 531 |
| 144 | Alliance Water Well Inc. | — | 1 | 458 |
| 145 | Rogers Drilling | — | 1 | 430 |
| 146 | Phillippi (Clair) | — | 1 | 425 |
| 147 | Layne Ohio (Layne Christensen) | — | 1 | 346 |
| 148 | Parker Well Drilling | — | 1 | 339 |
| 149 | G M Baker & Son | — | 1 | 259 |
| 150 | Clinton Well Drillers | — | 1 | 256 |
| 151 | Suburban Drilling Co. | — | 1 | 246 |
| 152 | L & M Drilling | — | 1 | 240 |
| 153 | J M Chuck Well Drilling | — | 1 | 239 |
| 154 | Burkhead Drilling & Excavating | — | 1 | 229 |
| 155 | Blocksom (P L) | — | 1 | 206 |
| 156 | Bowen Excavating And Drilling | — | 1 | 204 |
| 157 | Waltz (Kenneth) & Sons | — | 1 | 195 |
| 158 | Hamilton (J D JR) | — | 1 | 159 |
| 159 | Martin (George E) & Son | — | 1 | 148 |
| 160 | Miller (Clay E) | — | 1 | 122 |
| 161 | Lovely (Hershel) Well Drilling | — | 1 | 117 |
| 162 | C & K Well Drilling | — | 1 | 113 |
| 163 | Pinkerton (Carl) & Son | — | 1 | 112 |
| 164 | FW Eikleberry & Son | — | 1 | 111 |
| 165 | H & A Water Well Drlg & Pump Svc | — | 1 | 106 |
| 166 | Fait Drilling | — | 1 | 103 |
| 167 | R & J Well Drilling | — | 1 | 101 |
| 168 | Patterson Drilling | — | 1 | 92 |
| 169 | Foltz Well Drilling | — | 1 | 79 |
| 170 | Barker Well Drilling | — | 1 | 73 |
| 171 | Brothers Well Drilling | — | 1 | 72 |
| 172 | Tate Water Well Drilling | — | 1 | 63 |
| 173 | Hall Drilling | — | 1 | 63 |
| 174 | Notestone Well Drilling | — | 1 | 62 |
| 175 | Smith (James H) & Sons | — | 1 | 54 |
| 176 | Northwest Ohio Well Drilling | — | 1 | 42 |
| 177 | Dingess (Mansfield) Well Drilling | — | 1 | 35 |
| 178 | Daley Drilling Co. | — | 1 | 35 |
| 179 | Northcoast Drilling Service Inc. | — | 1 | 32 |
| 180 | Ripley (S Glenn) | — | 1 | 32 |
| 181 | W & W Drilling Co. | — | 1 | 26 |