Illinois Well Drillers Directory
Every company that appears as the driller of record in the Illinois State Geological Survey water well records, ranked by the number of wells they have drilled. 804 Illinois drilling companies account for 271,453 logged wells. Each profile shows the counties a company works, its well characteristics, and links to its original drilling logs — all drawn directly from the state record.
804drilling companies
68active since 2022
271,453wells on record
Companies with at least 25 wells on record. "Active" counts wells completed since 2022.
| # | Company | Wells | Since 2022 | Counties | Most recent |
|---|---|---|---|---|---|
| 1 | Huemann, Joseph J. | 4,619 | 225 | 6 | 2024-06-18 |
| 2 | Wagenbach, Mark | 293 | 135 | 12 | 2024-06-18 |
| 3 | Albrecht, Harold Dean | 1,132 | 118 | 27 | 2024-06-07 |
| 4 | Knierim, Ken/K & K Well Drlg. | 831 | 114 | 13 | 2024-06-06 |
| 5 | Dragovich, Mark G. | 268 | 86 | 5 | 2023-11-16 |
| 6 | Layten, Mark J. | 312 | 75 | 19 | 2024-01-05 |
| 7 | Liberg, Steve Jr. | 666 | 72 | 16 | 2023-09-10 |
| 8 | Allen, Joseph | 772 | 71 | 17 | 2024-09-10 |
| 9 | Brad Snelten | 147 | 67 | 4 | 2024-07-02 |
| 10 | Reiners, Lynn | 670 | 63 | 6 | 2023-11-22 |
| 11 | Findlay Bros. Well Drilling | 305 | 61 | 10 | 2024-05-29 |
| 12 | Tracy A Mcconnel | 140 | 59 | 21 | 2024-05-03 |
| 13 | Jason Jablonski | 89 | 55 | 9 | 2024-05-14 |
| 14 | Beanland, Ronald D. | 1,343 | 54 | 15 | 2022-09-06 |
| 15 | Davinroy, Mark | 100 | 54 | 2 | 2022-08-05 |
| 16 | Tyler J. Gee | 146 | 51 | 5 | 2024-05-07 |
| 17 | Haake, Ralph | 798 | 50 | 28 | 2022-12-20 |
| 18 | Harry T Waters | 89 | 50 | 17 | 2024-07-11 |
| 19 | Keller, Larry | 927 | 46 | 9 | 2024-04-24 |
| 20 | Beanland, Glen | 611 | 46 | 15 | 2024-05-20 |
| 21 | Binz, David Joseph | 980 | 44 | 5 | 2024-04-12 |
| 22 | Strange, Michael | 1,017 | 41 | 9 | 2024-05-10 |
| 23 | Skinner, Todd | 562 | 41 | 24 | 2024-04-15 |
| 24 | Kelly, Timothy | 70 | 37 | 24 | 2024-09-13 |
| 25 | Stinnett, David | 1,658 | 35 | 11 | 2023-11-20 |
| 26 | Stoll, Austen | 155 | 35 | 11 | 2023-12-07 |
| 27 | Durbin, Dominique | 102 | 34 | 19 | 2024-02-20 |
| 28 | Gebke, Randy | 93 | 34 | 16 | 2022-12-21 |
| 29 | Harvey, Lucius | 34 | 34 | 4 | 2024-05-28 |
| 30 | White, Matt | 330 | 32 | 8 | 2022-12-13 |
| 31 | Gelement, Val | 95 | 32 | 9 | 2023-12-13 |
| 32 | Ray Mueller | 30 | 30 | 7 | 2024-02-13 |
| 33 | Neely, Mark S. | 1,091 | 29 | 11 | 2024-02-02 |
| 34 | Roop, Randy/Jonas Martin Drlg. | 383 | 29 | 9 | 2024-01-03 |
| 35 | Schmalfeldt, Todd | 197 | 29 | 11 | 2022-10-08 |
| 36 | Harper, David | 317 | 26 | 3 | 2023-06-01 |
| 37 | Matt Liberg | 180 | 25 | 11 | 2023-09-26 |
| 38 | Smith, Allen E. | 271 | 24 | 9 | 2024-01-24 |
| 39 | Thompson, John | 87 | 24 | 3 | 2023-12-06 |
| 40 | Greg Tarter | 67 | 24 | 4 | 2023-10-18 |
| 41 | Scates, Stephen T. | 62 | 22 | 7 | 2023-11-15 |
| 42 | Bull Well Drilling Inc. | 56 | 22 | 6 | 2023-10-24 |
| 43 | Beanland, Leonard Ralph | 995 | 20 | 15 | 2023-10-19 |
| 44 | Parrott, Cody | 160 | 20 | 11 | 2023-10-26 |
| 45 | Municipal Well & Pump, Inc. | 49 | 20 | 17 | 2026-01-05 |
| 46 | Martin, Charles | 102 | 19 | 4 | 2024-01-05 |
| 47 | Area Well & Pump | 755 | 18 | 9 | 2023-01-16 |
| 48 | Will County Well & Pump | 724 | 16 | 13 | 2023-11-03 |
| 49 | Greg A. Evans | 102 | 16 | 24 | 2024-02-09 |
| 50 | Gingerich, Corwin | 330 | 15 | 21 | 2023-09-19 |
| 51 | Harriss, Chuck | 61 | 15 | 9 | 2024-03-22 |
| 52 | Gregory Horman | 27 | 15 | 5 | 2024-02-23 |
| 53 | S & J Well Drilling | 478 | 13 | 15 | 2023-11-13 |
| 54 | Michael C. Richards | 59 | 13 | 3 | 2023-07-22 |
| 55 | Beck, Harold F. Jr. | 1,185 | 11 | 10 | 2023-03-04 |
| 56 | Dohrman, Dale Raymond | 770 | 11 | 7 | 2023-06-12 |
| 57 | Berg Well & Pump | 529 | 11 | 15 | 2023-11-30 |
| 58 | Greenfield, Edward K. | 833 | 10 | 28 | 2024-06-10 |
| 59 | Snelten, Jeffrey | 1,958 | 9 | 4 | 2024-03-13 |
| 60 | Dryden, Michael | 323 | 8 | 11 | 2024-03-13 |
| 61 | Gaza, John Edward | 97 | 8 | 14 | 2023-02-22 |
| 62 | Danner, James | 51 | 8 | 4 | 2023-04-11 |
| 63 | Bassham, Billy | 510 | 7 | 14 | 2024-02-01 |
| 64 | Thierry, Keith | 207 | 7 | 8 | 2022-06-06 |
| 65 | Kickapoo Drilling Co. | 55 | 7 | 8 | 2023-06-27 |
| 66 | Stone, Bradley W. | 146 | 6 | 6 | 2023-12-21 |
| 67 | Hacker, Tim | 364 | 5 | 11 | 2023-10-19 |
| 68 | Schwall, John J. | 245 | 5 | 3 | 2023-05-22 |
| 69 | Boyce, Kenneth D. | 1,482 | 4 | 2 | 2023-05-20 |
| 70 | White, Chris Alan | 432 | 4 | 11 | 2023-06-27 |
| 71 | Blake, Wayne D. | 218 | 4 | 2 | 2023-05-16 |
| 72 | Erwin, James R. | 36 | 4 | 14 | 2024-02-23 |
| 73 | Roberts Environmental | 30 | 4 | 4 | 2023-12-14 |
| 74 | Weirich, William Theodore | 568 | 3 | 11 | 2023-05-18 |
| 75 | Dober, Darrel | 478 | 3 | 7 | 2023-12-09 |
| 76 | Cole, Steve | 344 | 3 | 10 | 2022-04-27 |
| 77 | Warner, Scott | 100 | 3 | 5 | 2023-04-19 |
| 78 | Niffenegger Well & Pump | 86 | 3 | 2 | 2022-08-18 |
| 79 | Tri County Irrigation & | 39 | 3 | 11 | 2022-12-12 |
| 80 | Albrecht Well Drilling Inc. | 56 | 2 | 15 | 2023-04-21 |
| 81 | Baker, J. Curtis | 55 | 2 | 12 | 2023-10-20 |
| 82 | Layne Christensen Co. | 49 | 2 | 20 | 2023-11-14 |
| 83 | Watters, James | 45 | 2 | 3 | 2022-06-22 |
| 84 | Hemmen, Jake | 27 | 2 | 12 | 2023-03-21 |
| 85 | Huemann, William F. | 4,133 | 1 | 5 | 2023-06-20 |
| 86 | K & K Well Drilling | 3,028 | 1 | 24 | 2023-11-16 |
| 87 | Hinkle, J & J Well & Septic | 1,003 | 1 | 6 | 2022-08-28 |
| 88 | Liberg, Patrick A. | 779 | 1 | 9 | 2025-03-05 |
| 89 | Deppe, Edward M. | 182 | 1 | 7 | 2022-07-08 |
| 90 | Scates, Thomas L. | 176 | 1 | 7 | 2022-08-18 |
| 91 | Rosenquist, Robert G. | 158 | 1 | 8 | 2022-09-23 |
| 92 | Gingerich, Klint | 88 | 1 | 8 | 2022-08-09 |
| 93 | Winslow, Loring Field | 51 | 1 | 4 | 2025-02-20 |
| 94 | Faherty, Jeff | 26 | 1 | 2 | 2022-06-21 |
| 95 | Kohnen, Clarence | 12,561 | — | 45 | 2017-10-31 |
| 96 | Fykes, Charles N. | 5,947 | — | 15 | 2009-12-12 |
| 97 | Knierim, Phil | 5,361 | — | 27 | 2001-05-10 |
| 98 | Gaffke, George E. | 4,817 | — | 8 | 2010-03-24 |
| 99 | Sauder, Steven E. | 2,716 | — | 17 | 2020-10-20 |
| 100 | Layten, James | 2,582 | — | 15 | 2019-12-05 |
| 101 | Noll, Gary E. | 2,513 | — | 12 | 2001-03-24 |
| 102 | Reynolds, Joseph R. | 2,477 | — | 34 | 1993-12-09 |
| 103 | Martin, Jonas Willard | 2,393 | — | 15 | 2000-11-24 |
| 104 | Wellendorf, Rodney | 2,313 | — | 15 | 2010-06-10 |
| 105 | Kingsley, Arthur W. | 2,249 | — | 10 | 2008-12-29 |
| 106 | Beaman, Jessie J. | 2,238 | — | 7 | 2017-10-15 |
| 107 | Snelten, Richard Charles | 2,177 | — | 4 | 2007-06-26 |
| 108 | Brown, Darwin | 2,130 | — | 11 | 2015-11-04 |
| 109 | Sharpe, Franklin N. | 2,123 | — | 10 | 2019-01-17 |
| 110 | Livingston, Lowell | 2,115 | — | 8 | 2021-08-23 |
| 111 | Rob, Ronald Gene | 2,075 | — | 18 | 2018-10-15 |
| 112 | Madsen, Charles E. | 2,029 | — | 2 | 2001-10-04 |
| 113 | Albrecht, S. Dean | 1,836 | — | 46 | 2008-01-16 |
| 114 | Efflandt, Robert | 1,673 | — | 7 | 2010-04-27 |
| 115 | Baker, Earl Jr. | 1,667 | — | 43 | 1994-09-16 |
| 116 | Reynolds Well Drilling | 1,657 | — | 38 | 2020-10-13 |
| 117 | Fordonski, Keith | 1,622 | — | 19 | 2015-05-14 |
| 118 | Nice, Mark E. | 1,589 | — | 13 | 2021-09-16 |
| 119 | Matherly, Hubert | 1,477 | — | 11 | 2006-12-07 |
| 120 | Walters, Larry | 1,465 | — | 12 | 2013-07-10 |
| 121 | Griffy, Cecil | 1,460 | — | 4 | 2016-12-28 |
| 122 | Courson, Roger | 1,443 | — | 17 | 2002-11-19 |
| 123 | Layne Western Co., Inc. | 1,442 | — | 78 | 2015-09-24 |
| 124 | Wiesenhofer, Andrew | 1,411 | — | 49 | 2020-06-18 |
| 125 | Link, Harold F. | 1,386 | — | 25 | 1993-08-16 |
| 126 | Walters, Steven | 1,374 | — | 24 | 2004-07-21 |
| 127 | Hoover, Lonny R. | 1,357 | — | 5 | 2001-04-02 |
| 128 | Lyons, Glenn L | 1,342 | — | 10 | 1997-01-03 |
| 129 | Latta, Kirk Stephen | 1,317 | — | 14 | 2016-03-17 |
| 130 | Snelten, Greg | 1,298 | — | 6 | 2021-06-14 |
| 131 | Matthesius, Fred H. | 1,282 | — | 6 | 1989-11-30 |
| 132 | Senffner, Alan James | 1,250 | — | 12 | 2020-11-05 |
| 133 | Dietzman, Gerald E. | 1,210 | — | 20 | 2008-06-19 |
| 134 | Lyons, Larry | 1,163 | — | 9 | 2020-04-15 |
| 135 | Madsen, Michael A. | 1,147 | — | 2 | 2021-07-30 |
| 136 | Rob, Peter | 1,142 | — | 7 | 1985-08-16 |
| 137 | Cole, Raymond J. | 1,135 | — | 29 | 1999-11-22 |
| 138 | Haudrich, Clyde Jerome | 1,121 | — | 7 | 2016-11-15 |
| 139 | Nice, Marvin R. | 1,120 | — | 10 | 1997-11-12 |
| 140 | Dirks, Michael | 1,115 | — | 33 | 2019-04-25 |
| 141 | Speth, James | 1,113 | — | 18 | 2020-06-03 |
| 142 | Gross, Michael | 1,107 | — | 3 | 2009-04-10 |
| 143 | Beasley, Eugene B. | 1,106 | — | 15 | 1986-09-02 |
| 144 | Dupage Pump | 1,094 | — | 8 | 1981-01-04 |
| 145 | Mashburn, Robert | 1,041 | — | 11 | 2016-11-10 |
| 146 | Olson, Robert C | 1,003 | — | 11 | 1992-09-02 |
| 147 | Hopson, Seldon C | 974 | — | 16 | 1994-07-25 |
| 148 | Jet Hall/Lutes H2o Well Drlg. | 971 | — | 14 | 2021-12-24 |
| 149 | Greenfield, Edwin D. | 968 | — | 8 | 2021-10-25 |
| 150 | Timmerman, Tom | 968 | — | 6 | 2018-07-18 |
| 151 | Boetsch, William M. | 964 | — | 7 | 2003-03-10 |
| 152 | Bergschneider, Richard | 922 | — | 14 | 2000-08-17 |
| 153 | Bekemeyer, Gust | 919 | — | 9 | 1992-07-04 |
| 154 | Dresden, Edward L. | 913 | — | 6 | 2000-12-01 |
| 155 | Bull, Jack D. | 908 | — | 8 | 1999-04-12 |
| 156 | Knierim, James | 897 | — | 29 | 1994-09-12 |
| 157 | Knierim Company, Inc. | 888 | — | 11 | 1978-11-01 |
| 158 | Rosenquist, Gerald Wilbur | 883 | — | 9 | 2000-01-18 |
| 159 | Henry, John | 868 | — | 31 | 2020-05-04 |
| 160 | Hoover Water Well Service | 867 | — | 4 | 2006-08-29 |
| 161 | Sims, R. Marc Jr. | 840 | — | 13 | 2013-11-22 |
| 162 | Knierim, Paul L. | 834 | — | 7 | 1982-07-28 |
| 163 | Schuur, Bill | 797 | — | 10 | 2018-07-26 |
| 164 | Wilson, Olen L. | 785 | — | 9 | 1984-06-27 |
| 165 | Meadow Equipment | 781 | — | 15 | 2013-07-11 |
| 166 | Wehling Well Works, Inc. | 755 | — | 26 | 1991-09-26 |
| 167 | Kremer, Jack Lee | 737 | — | 13 | 2012-01-16 |
| 168 | Howe, Robert E. Jr. | 729 | — | 3 | 2007-11-27 |
| 169 | Prairie, Arthur | 716 | — | 3 | 2001-04-26 |
| 170 | Adolphson, Robert M. Jr. | 714 | — | 12 | 1990-09-25 |
| 171 | Snelten, Stephen A. | 698 | — | 6 | 2010-10-08 |
| 172 | Thompson, John J. | 697 | — | 5 | 2020-03-23 |
| 173 | Bull, Jack Well & Septic | 693 | — | 5 | 2002-05-04 |
| 174 | Albrecht, Dean S. | 693 | — | 35 | 1993-08-13 |
| 175 | Bloyer Well Co. | 686 | — | 6 | 2016-10-10 |
| 176 | Hepp, Frank D. Jr. | 684 | — | 14 | 2008-08-08 |
| 177 | Pilgard, Peter | 673 | — | 7 | 1990-12-19 |
| 178 | Findlay, Terry A. | 671 | — | 6 | 2015-05-05 |
| 179 | Madsen, Charles | 669 | — | 1 | 1969-06-01 |
| 180 | Foyle, Richard S. | 657 | — | 3 | 1980-02-15 |
| 181 | Hofstetter, William S. | 656 | — | 10 | 1994-07-16 |
| 182 | Beckett, Donald | 655 | — | 31 | 2018-10-30 |
| 183 | Lutes, George W. | 650 | — | 10 | 1998-06-23 |
| 184 | Hacker, Delbert | 644 | — | 15 | 1998-08-10 |
| 185 | Goodrum, Larry P. | 640 | — | 5 | 2017-10-11 |
| 186 | Bush, Henry L. | 638 | — | 13 | 1997-08-29 |
| 187 | Scherf Robert William | 614 | — | 16 | 1991-10-08 |
| 188 | Pilgard, John P. | 606 | — | 7 | 1995-10-23 |
| 189 | Ebert, Robert H | 606 | — | 7 | 2014-10-29 |
| 190 | Wilson, Deneal | 600 | — | 12 | 2016-11-20 |
| 191 | Sims, Ronald M. Sr. | 590 | — | 22 | 2000-07-20 |
| 192 | Wehling, Wendell E. | 583 | — | 12 | 2006-01-03 |
| 193 | Wertz, Charles L. | 580 | — | 3 | 1995-05-31 |
| 194 | Forder, James | 577 | — | 8 | 2017-05-17 |
| 195 | Beanland, John R. | 570 | — | 14 | 2018-10-06 |
| 196 | Strange, Robert E. | 558 | — | 10 | 2021-10-25 |
| 197 | Erwin, Harold E. | 545 | — | 13 | 2002-08-30 |
| 198 | Luttrell, Gerald Dean | 545 | — | 17 | 1995-04-06 |
| 199 | Kerry, Charles M. | 535 | — | 14 | 2009-09-30 |
| 200 | Neely, Harry C. | 532 | — | 14 | 1999-12-20 |
| 201 | Fischer, James Monroe | 532 | — | 8 | 2021-12-25 |
| 202 | Grosch, Wayne A. | 528 | — | 38 | 2006-02-28 |
| 203 | Coad, Floyd M. | 509 | — | 5 | 1999-11-16 |
| 204 | NO Company | 508 | — | 62 | 1993-01-01 |
| 205 | Beaman, John A. | 507 | — | 8 | 2016-05-11 |
| 206 | Johnson, James P. | 503 | — | 9 | 1980-12-30 |
| 207 | Sisson, Edward | 499 | — | 8 | 1991-04-12 |
| 208 | Dowell, S.l. | 495 | — | 19 | 2012-05-15 |
| 209 | Vaughn, Kenneth G. | 492 | — | 9 | 2009-04-01 |
| 210 | Mckinney, Melvin | 491 | — | 6 | 1986-11-26 |
| 211 | Gwin Drilling Co. | 477 | — | 18 | 1976-06-01 |
| 212 | Erwin, James Ray | 466 | — | 12 | 2008-08-28 |
| 213 | Mills, Wayne | 466 | — | 3 | 2014-05-23 |
| 214 | St. Charles Drilling Co. | 463 | — | 14 | 1981-11-20 |
| 215 | Geer, James A. | 460 | — | 14 | 1992-10-31 |
| 216 | Neeley, Harry C. | 455 | — | 9 | 1993-07-30 |
| 217 | Blake, William D. | 454 | — | 2 | 2003-10-06 |
| 218 | Sloan, Thomas F. | 448 | — | 28 | 2021-09-20 |
| 219 | Nice, Craig | 448 | — | 7 | 2001-07-20 |
| 220 | Horman, Paul | 439 | — | 11 | 2020-08-24 |
| 221 | Bisping, Calvin | 437 | — | 10 | 2010-10-06 |
| 222 | Kuntz, John E. | 434 | — | 7 | 2007-04-24 |
| 223 | Harold Dean Albrecht | 433 | — | 20 | 2007-03-20 |
| 224 | Jurs, Martin & Son | 419 | — | 4 | 1978-10-15 |
| 225 | Albrecht, S. D. | 413 | — | 17 | 1989-02-19 |
| 226 | Luttrell, James | 406 | — | 14 | 2001-11-21 |
| 227 | Biggerstaff, James | 406 | — | 8 | 1984-03-04 |
| 228 | Ebert, William M. | 405 | — | 6 | 1998-05-20 |
| 229 | Silvius Bros. | 394 | — | 6 | 1979-08-01 |
| 230 | Prairie, Art | 390 | — | 2 | 1980-09-01 |
| 231 | Jones, Gerald K. | 388 | — | 10 | 2020-09-17 |
| 232 | Woodward, Lawrence | 388 | — | 12 | 1996-03-11 |
| 233 | Liberg, Steven Scott | 377 | — | 10 | 2012-05-04 |
| 234 | Acker, Roger | 373 | — | 10 | 2003-10-01 |
| 235 | Haudrich Drlg. | 373 | — | 5 | 1977-10-17 |
| 236 | Hopson, Scott | 368 | — | 12 | 2004-03-02 |
| 237 | Pohlman, Herman J. | 367 | — | 12 | 1993-12-02 |
| 238 | Carlson, William L. | 365 | — | 2 | 1989-04-10 |
| 239 | Liberg, Thomas P. | 357 | — | 7 | 1993-08-18 |
| 240 | Randy Roop/Jonas Martin Drlg. | 352 | — | 10 | 2007-01-30 |
| 241 | Lockport Well & Pump | 352 | — | 7 | 2009-11-01 |
| 242 | Gross, Eugene J. | 352 | — | 1 | 1999-09-25 |
| 243 | Swanson, Jean E. | 349 | — | 10 | 1997-12-01 |
| 244 | Stone, Ronald | 347 | — | 5 | 1994-01-06 |
| 245 | Boysen, Henry Co. | 346 | — | 7 | 2005-10-03 |
| 246 | Liberg, John E. | 346 | — | 13 | 2019-10-08 |
| 247 | Stone, Guy D. | 337 | — | 8 | 2007-08-28 |
| 248 | Abbott, Albert | 337 | — | 11 | 1987-06-16 |
| 249 | Mashburn, Grover C. Jr. | 334 | — | 11 | 1994-09-18 |
| 250 | Wills, William D. | 333 | — | 7 | 2017-09-19 |
| 251 | Shoemaker & Sons Drilling | 330 | — | 13 | 2009-09-01 |
| 252 | Hutchings, Clyde A. | 321 | — | 6 | 1994-08-26 |
| 253 | Wauchholder Well Drilling | 320 | — | 2 | 2012-05-15 |
| 254 | York, Warren Thomas | 317 | — | 4 | 2007-09-15 |
| 255 | Holleman, Herbert | 317 | — | 3 | 1982-11-28 |
| 256 | Pitz, John W. | 317 | — | 9 | 2003-10-02 |
| 257 | Fleming, Rodney K. | 314 | — | 11 | 1991-12-31 |
| 258 | Jones, Gerald B. | 313 | — | 12 | 1991-07-23 |
| 259 | Wehling, Richard H. | 312 | — | 23 | 1994-08-05 |
| 260 | Mckinney, Ted | 310 | — | 33 | 1985-06-21 |
| 261 | Stinnett, James R. | 309 | — | 8 | 1992-10-02 |
| 262 | Gross, Emil E. | 308 | — | 2 | 1988-04-20 |
| 263 | Cook, George | 305 | — | 11 | 1981-09-01 |
| 264 | John A. Jablonski | 302 | — | 6 | 2007-01-21 |
| 265 | Stone, Ronald D. | 301 | — | 7 | 1992-10-13 |
| 266 | Miller, J.p. Artesian Well Co. | 300 | — | 32 | 1983-09-16 |
| 267 | Williams, Robert | 300 | — | 10 | 2018-01-26 |
| 268 | Huemann, John J. | 298 | — | 4 | 2005-08-11 |
| 269 | Heins, Don | 296 | — | 5 | 1974-03-15 |
| 270 | Knierum, Paul | 296 | — | 9 | 1974-04-30 |
| 271 | Scherf, Robert W. | 295 | — | 15 | 1991-05-02 |
| 272 | Stone, James R. | 292 | — | 8 | 1992-10-21 |
| 273 | Martin, Lawrence | 292 | — | 3 | 1998-07-10 |
| 274 | Knierim, Phillip E. | 292 | — | 5 | 1978-07-10 |
| 275 | Miller, J. P. Art. Well | 291 | — | 28 | 1978-10-12 |
| 276 | Sission, Edward H. | 291 | — | 5 | 1983-08-25 |
| 277 | Weburg, E. Marvin | 290 | — | 5 | 1980-08-01 |
| 278 | Tri County Well & Pump | 289 | — | 11 | 2017-07-12 |
| 279 | Keen, Bradley E. | 288 | — | 19 | 2016-09-12 |
| 280 | Donald E. Stoneberger | 277 | — | 7 | 2001-08-28 |
| 281 | Richey, Quentin R. | 276 | — | 14 | 1981-07-17 |
| 282 | Eaton, Zane C. | 276 | — | 11 | 1989-06-27 |
| 283 | Wirfs, Clements J. | 276 | — | 2 | 1981-03-25 |
| 284 | Lecocq, E. J. | 274 | — | 2 | 1976-01-01 |
| 285 | D & S Drilling | 273 | — | 8 | 1976-10-09 |
| 286 | Jack Bull Well & Septic | 271 | — | 6 | 2002-06-21 |
| 287 | Henry Boysen Co.,Lichter,John | 268 | — | 4 | 1973-08-30 |
| 288 | Roberts, Charles Wayne | 258 | — | 10 | 2018-10-18 |
| 289 | Geltz, N. H. | 254 | — | 6 | 2018-04-05 |
| 290 | Roy Thorne | 253 | — | 16 | 2005-10-26 |
| 291 | Wiesenhofer, Donald E. | 253 | — | 11 | 2012-09-12 |
| 292 | H2o Well & Pump Co. | 250 | — | 4 | 2008-11-15 |
| 293 | Sergent, William E. | 249 | — | 15 | 1985-07-30 |
| 294 | Wayne D. Blake | 247 | — | 1 | 2006-09-28 |
| 295 | Jablonski, John A. | 246 | — | 7 | 2020-12-24 |
| 296 | Miller, Alfred Hampton | 246 | — | 10 | 1996-05-21 |
| 297 | Wehling, E. C. | 245 | — | 4 | 1973-09-18 |
| 298 | Seibring Well Drilling | 242 | — | 4 | 2013-07-26 |
| 299 | Doyle, Gerald | 242 | — | 9 | 2015-02-02 |
| 300 | Rix, John Richard | 239 | — | 6 | 2013-10-01 |
| 301 | Hinkle, James A. | 236 | — | 5 | 1998-09-24 |
| 302 | Speth, David A. | 236 | — | 6 | 1996-06-25 |
| 303 | Baker, E. C. & Sons | 232 | — | 34 | 2002-12-09 |
| 304 | Mckinney, Melvin D. | 230 | — | 4 | 1994-06-12 |
| 305 | Breitzke, Wm. | 224 | — | 4 | 1958-01-01 |
| 306 | Arron Baum | 223 | — | 21 | 2007-06-11 |
| 307 | Hacker, Marvin | 223 | — | 10 | 2012-06-05 |
| 308 | Jacobs, Ray E. | 221 | — | 15 | 1991-08-03 |
| 309 | Olson, Alan R. | 220 | — | 5 | 1999-06-08 |
| 310 | Charles Hollinshead | 219 | — | 17 | 2007-04-06 |
| 311 | Groves, Forest E. | 218 | — | 7 | 1994-11-06 |
| 312 | Callihan, Michael M. | 218 | — | 5 | 1992-07-08 |
| 313 | Dana, Glen | 218 | — | 11 | 2021-07-30 |
| 314 | Joe Arwood | 217 | — | 4 | 2006-03-28 |
| 315 | Speth, David | 217 | — | 9 | 2013-08-14 |
| 316 | Jensen, Kenneth Lee | 216 | — | 6 | 1995-03-29 |
| 317 | Dohrman, Raymond | 215 | — | 6 | 1995-07-12 |
| 318 | Stanley, Charles | 213 | — | 6 | 1998-07-01 |
| 319 | Glenn, James E. | 211 | — | 3 | 2009-06-11 |
| 320 | Anderson & Son, T. F. | 211 | — | 4 | 1966-06-01 |
| 321 | Olson Well & Pump Co. | 210 | — | 7 | 2005-08-31 |
| 322 | Senffner, Keith | 209 | — | 11 | 2007-12-20 |
| 323 | Miller, Claude W. | 208 | — | 8 | 1990-01-15 |
| 324 | Sheets, Michael | 208 | — | 2 | 2002-10-21 |
| 325 | Hofstetter, Ralph W. | 208 | — | 4 | 2015-10-13 |
| 326 | Harding, James R. | 207 | — | 8 | 1997-08-24 |
| 327 | Liberg, Paul Evan | 205 | — | 5 | 1994-10-06 |
| 328 | Luton, C.m. | 204 | — | 8 | 1979-11-24 |
| 329 | Hinkle, T. | 203 | — | 3 | 1976-11-30 |
| 330 | Ward, Delbert G. | 203 | — | 5 | 2017-03-10 |
| 331 | Martin, C. & Sons Well Co. | 200 | — | 6 | 2009-05-17 |
| 332 | David Harper | 200 | — | 5 | 2006-11-22 |
| 333 | Elfmann, Larry T. | 198 | — | 5 | 1994-07-14 |
| 334 | Hampton, Edward T. | 195 | — | 11 | 1977-10-14 |
| 335 | Acker, Norman L. | 194 | — | 4 | 1989-06-27 |
| 336 | Glenn, E. H. | 193 | — | 3 | 2000-06-27 |
| 337 | Harper, Jerry | 193 | — | 2 | 2006-01-11 |
| 338 | Dreher & Schorie | 191 | — | 2 | 1979-06-01 |
| 339 | Niffenegger, ED | 190 | — | 3 | 1984-06-21 |
| 340 | Rimbey, Brian | 189 | — | 16 | 2009-05-16 |
| 341 | Kinman, Otho | 188 | — | 4 | 1965-01-01 |
| 342 | Pilgard, Peter & Sons | 188 | — | 4 | 1993-04-26 |
| 343 | Guarin, Harland | 188 | — | 10 | 1999-02-12 |
| 344 | Baum, Arron | 187 | — | 19 | 2008-09-26 |
| 345 | Faherty, Francis | 187 | — | 2 | 2006-09-15 |
| 346 | Miles & Sons | 186 | — | 11 | 1974-02-01 |
| 347 | Pitz, N. L. | 186 | — | 6 | 1977-07-01 |
| 348 | Berns, George J. | 186 | — | 2 | 1950-09-01 |
| 349 | Puckett, Arnold L. | 184 | — | 8 | 1996-09-30 |
| 350 | Hollinshead, Charles | 183 | — | 14 | 2012-07-28 |
| 351 | Efflandt, Herman John | 183 | — | 4 | 1995-08-28 |
| 352 | H&h Drilling | 183 | — | 2 | 1991-12-10 |
| 353 | Barker, Paul A. | 181 | — | 9 | 1979-04-09 |
| 354 | Holleman, Herbert Jr. | 181 | — | 3 | 1983-12-08 |
| 355 | Eaton Well Drlg.(Zane Eaton) | 179 | — | 11 | 1985-03-01 |
| 356 | Rieke Well Drilling Co. | 179 | — | 5 | 1970-07-19 |
| 357 | Lode, Lawrence James | 179 | — | 5 | 2009-12-18 |
| 358 | Keen, George | 176 | — | 12 | 1995-08-14 |
| 359 | Rider, John Bennedict | 176 | — | 6 | 1987-11-12 |
| 360 | Aneffco Well Drilling | 175 | — | 11 | 2002-06-14 |
| 361 | Mckinsey, Melvin D. | 175 | — | 2 | 1977-02-01 |
| 362 | Kuntz, Peter William | 173 | — | 7 | 1990-05-17 |
| 363 | Cosby, Edward L. Sr. | 173 | — | 6 | 1997-09-09 |
| 364 | Dement, Ray | 171 | — | 8 | 1988-10-24 |
| 365 | Dober, Darrel R. | 171 | — | 9 | 1995-08-01 |
| 366 | Tyrrell, Jeffrey | 170 | — | 8 | 2020-11-09 |
| 367 | Hampton, E. T. | 170 | — | 10 | 1976-06-01 |
| 368 | Binz, Wayne L. | 167 | — | 3 | 1980-08-10 |
| 369 | Shoemaker, John E. | 166 | — | 11 | 1993-12-24 |
| 370 | Ruester, John T. | 166 | — | 29 | 1985-07-03 |
| 371 | Grosch Irrigation | 166 | — | 23 | 2020-10-07 |
| 372 | Bottlemy, August | 163 | — | 2 | 1973-07-18 |
| 373 | E & D Well Drilling | 163 | — | 4 | 1972-11-28 |
| 374 | Stevens, Dale O. | 163 | — | 6 | 2006-05-30 |
| 375 | Wakefield, Jerry H | 162 | — | 10 | 1996-07-24 |
| 376 | Abbott, Albert G. | 162 | — | 4 | 1979-08-17 |
| 377 | Wills, Elmer | 162 | — | 5 | 1998-03-24 |
| 378 | Niffenegger, Edward L. | 161 | — | 3 | 2011-07-01 |
| 379 | DU Page Pump Inc. | 161 | — | 4 | 1978-09-27 |
| 380 | Tyrrell R W | 161 | — | 2 | 1979-05-10 |
| 381 | Winslow, Edwin F. | 161 | — | 10 | 1997-10-06 |
| 382 | Kohnen, Clarence E. | 159 | — | 15 | 1992-11-12 |
| 383 | Raney, Sherman | 158 | — | 6 | 1981-01-24 |
| 384 | Hageman, Alvin B. | 157 | — | 10 | 2008-10-16 |
| 385 | Butts, Leon | 156 | — | 6 | 1976-07-20 |
| 386 | Allabaugh, Neil M. | 155 | — | 6 | 2006-05-02 |
| 387 | Woollen Brothers | 154 | — | 8 | 1970-05-26 |
| 388 | Foyle, Bert | 153 | — | 1 | 1945-01-01 |
| 389 | Johnson C R | 153 | — | 3 | 1978-09-01 |
| 390 | Crumpler, William | 153 | — | 5 | 1977-09-20 |
| 391 | Rosset, Richard D. | 150 | — | 3 | 2006-02-01 |
| 392 | O. Lutes & Son | 149 | — | 2 | 1976-02-09 |
| 393 | Diebold Chester C | 149 | — | 3 | 1968-05-01 |
| 394 | White, Harold E. | 147 | — | 7 | 2000-11-21 |
| 395 | French, Loren K. | 147 | — | 7 | 1979-11-01 |
| 396 | Tascher, Vincent A. | 147 | — | 2 | 1998-06-12 |
| 397 | Fleming, Daniel D. | 146 | — | 9 | 1979-12-31 |
| 398 | L. J. Macauley & Sons | 146 | — | 1 | 1943-01-01 |
| 399 | Bjorklund, Lloyd A. | 146 | — | 9 | 1997-07-01 |
| 400 | Mills,Wayn/Prairie Well Drlg. | 145 | — | 2 | 2001-02-15 |
| 401 | Kuehn, Kurt | 144 | — | 5 | 1997-05-10 |
| 402 | Courson, Richard C. | 143 | — | 9 | 1979-05-28 |
| 403 | Durbin, Kandra M. | 143 | — | 22 | 2019-07-18 |
| 404 | Dana, Steve | 143 | — | 8 | 2006-12-01 |
| 405 | Gibbs Well Drilling | 141 | — | 15 | 1977-05-09 |
| 406 | Klint Gingerich | 141 | — | 10 | 2007-01-18 |
| 407 | David M. Smith | 141 | — | 5 | 2006-11-30 |
| 408 | Woodruff Charles Co. | 140 | — | 4 | 1973-11-01 |
| 409 | Dingledine, David | 140 | — | 3 | 2012-09-26 |
| 410 | Thompson, Nicholas R. | 139 | — | 5 | 2012-10-07 |
| 411 | Mckinney, Winifred | 138 | — | 3 | 1980-06-16 |
| 412 | Baker, Paul A. | 137 | — | 4 | 1979-07-01 |
| 413 | Woodruff, Charles E. Co. | 137 | — | 5 | 1975-01-31 |
| 414 | Greenfield, ED | 137 | — | 10 | 1993-05-21 |
| 415 | Palmer & Son, B. L. | 137 | — | 3 | 1978-12-01 |
| 416 | Miller, J.p. Co. | 136 | — | 19 | 1982-06-21 |
| 417 | Bolliger, John & Sons | 136 | — | 12 | 1966-10-01 |
| 418 | Van Gilder, Richard E. | 136 | — | 6 | 2012-07-23 |
| 419 | Glen Dana | 136 | — | 8 | 2006-07-13 |
| 420 | Sims Drilling Co. | 133 | — | 11 | 2009-12-17 |
| 421 | Baker, Donald | 133 | — | 15 | 1995-11-01 |
| 422 | Hunter, Dennis | 133 | — | 7 | 2001-04-28 |
| 423 | Huikle, T. | 132 | — | 3 | 1974-11-13 |
| 424 | Holleman, H. | 131 | — | 3 | 1980-05-20 |
| 425 | Hatton Bros. | 131 | — | 1 | 1974-01-15 |
| 426 | Warth, William | 130 | — | 9 | 2004-04-13 |
| 427 | Buffington, G. | 130 | — | 32 | 2014-09-03 |
| 428 | Lamp, Robert Wayne | 129 | — | 6 | 1997-07-15 |
| 429 | Delaney, Leonard I. | 129 | — | 2 | 1983-10-22 |
| 430 | Acker, Norman | 129 | — | 2 | 1979-08-22 |
| 431 | Martin, Charles Leroy | 128 | — | 4 | 1999-06-21 |
| 432 | Fykes Charles & Pump | 127 | — | 2 | 1980-11-01 |
| 433 | Kerry, Charles | 126 | — | 5 | 1997-02-28 |
| 434 | Tolley, David F. | 125 | — | 13 | 2007-04-27 |
| 435 | Hart - Will-Dupage Drilling | 125 | — | 6 | 1978-03-01 |
| 436 | Latta, Mark Duane | 124 | — | 9 | 2019-07-29 |
| 437 | Brown Irrigation Co. | 124 | — | 6 | 1969-01-01 |
| 438 | Wehling, Richard W. | 123 | — | 10 | 2019-09-05 |
| 439 | Tyrrell, Richard William | 123 | — | 3 | 1991-06-09 |
| 440 | Brenner, James H. | 122 | — | 2 | 1989-04-26 |
| 441 | Wertz, Art | 122 | — | 2 | 1974-01-08 |
| 442 | Stone H I & Son | 120 | — | 4 | 1976-12-10 |
| 443 | Adolphson Well Drlg. Service | 119 | — | 2 | 1974-07-29 |
| 444 | Lowry, John H. | 118 | — | 6 | 1975-03-20 |
| 445 | Potrykos, Frank | 118 | — | 1 | 1972-05-26 |
| 446 | Skouby, Charles A. | 118 | — | 3 | 2016-10-28 |
| 447 | Ryan, John H. | 116 | — | 13 | 1998-01-17 |
| 448 | Van Hoozen, Lucy H. | 115 | — | 4 | 1948-01-01 |
| 449 | Hayes & Sims | 115 | — | 21 | 1951-08-27 |
| 450 | Rimbey, Jesse Dick | 115 | — | 8 | 1998-11-15 |
| 451 | Fleming, D. D. | 115 | — | 7 | 1978-05-20 |
| 452 | Kuntz, John | 115 | — | 6 | 1997-02-12 |
| 453 | Knierim, Max | 114 | — | 7 | 1979-02-16 |
| 454 | Zbinden, Daniel B. | 114 | — | 2 | 2017-09-27 |
| 455 | Geiger, S. B. | 113 | — | 8 | 1980-06-03 |
| 456 | Sergent, William Eli | 112 | — | 7 | 1974-07-01 |
| 457 | Vangilder, Richard E. | 112 | — | 4 | 1995-03-15 |
| 458 | Pediger, Dan | 112 | — | 2 | 1974-10-01 |
| 459 | Ken Knierim/K & K Well Drlg. | 112 | — | 8 | 2006-04-18 |
| 460 | Layne & Western Co. | 110 | — | 36 | 2013-05-16 |
| 461 | Chitwood, Charles P. | 110 | — | 8 | 1990-04-25 |
| 462 | Wilson, Carl | 109 | — | 6 | 1976-09-18 |
| 463 | Alco Oil & Gas Corp. | 107 | — | 29 | 1998-10-23 |
| 464 | Wilson, Carline | 107 | — | 7 | 1988-08-26 |
| 465 | Joseph Allen | 107 | — | 9 | 2007-02-27 |
| 466 | Moore, John V. | 106 | — | 10 | 2005-08-27 |
| 467 | Boysen, Henry Co.,Lichter,John | 104 | — | 3 | 1974-09-22 |
| 468 | Hawkins, Howard/Adolphson, Bob | 104 | — | 3 | 1978-08-06 |
| 469 | Pilgard, Peter & Son | 103 | — | 4 | 1979-01-31 |
| 470 | Smeja, Robert B. | 102 | — | 6 | 1996-02-15 |
| 471 | Dohrman, Donald W. | 102 | — | 5 | 1981-11-11 |
| 472 | Zhieriy, Keith | 102 | — | 9 | 2019-03-27 |
| 473 | Luhr Brothers, Inc. | 101 | — | 13 | 1976-10-01 |
| 474 | Carson, James R. | 101 | — | 25 | 1986-06-19 |
| 475 | Blake, Russell | 101 | — | 5 | 1978-11-11 |
| 476 | Roper, William H. | 100 | — | 3 | 1978-08-09 |
| 477 | Dresden, Edward | 100 | — | 3 | 1982-08-03 |
| 478 | Dick's Well & Pump | 100 | — | 3 | 2017-09-06 |
| 479 | Webber, Robert Lee | 100 | — | 2 | 1991-10-01 |
| 480 | Lentz Tony | 99 | — | 1 | 1949-05-01 |
| 481 | Swanson, Randy | 98 | — | 9 | 1997-04-19 |
| 482 | Hoover Water Well Servic | 98 | — | 6 | 1975-08-01 |
| 483 | Blake, Russell K. | 98 | — | 4 | 1994-10-30 |
| 484 | Snelton Bros. | 97 | — | 5 | 1940-10-01 |
| 485 | Glenn, Henry A. | 97 | — | 2 | 2003-03-18 |
| 486 | Martin, Lawrence W. | 97 | — | 2 | 1964-01-01 |
| 487 | Klassen, Genevieve M. | 96 | — | 21 | 2012-04-28 |
| 488 | Haskins, D. | 96 | — | 7 | 2012-08-15 |
| 489 | Edward M. Deppe | 96 | — | 5 | 2006-09-19 |
| 490 | Schmalz Geo A & Son | 95 | — | 2 | 1967-01-01 |
| 491 | White Bros. | 93 | — | 5 | 2000-05-02 |
| 492 | Drake, Don | 92 | — | 2 | 1978-10-17 |
| 493 | Cole, Raymond Joseph Jr. | 92 | — | 11 | 2003-11-03 |
| 494 | Pittman, Robert Dale | 92 | — | 7 | 1973-07-06 |
| 495 | Bloyer, Ralph | 91 | — | 4 | 1972-06-08 |
| 496 | Bautsch, Thomas E. | 91 | — | 1 | 1997-02-25 |
| 497 | Fischer James | 90 | — | 2 | 1978-08-01 |
| 498 | Reiners, Walter C. | 90 | — | 2 | 2003-08-21 |
| 499 | Jurs Martin&sons Inc. | 89 | — | 4 | 1978-07-06 |
| 500 | Hall, Edward - Web Well & Pump | 89 | — | 5 | 2006-07-01 |
| 501 | Meyer, George | 89 | — | 6 | 1996-11-01 |
| 502 | Grosch, Gottlieb W. | 89 | — | 6 | 1994-04-20 |
| 503 | Wertz, Arthur W. | 89 | — | 2 | 1982-03-15 |
| 504 | Sims, Ronald M. Jr. | 87 | — | 10 | 1995-11-27 |
| 505 | Erwin, James | 85 | — | 12 | 2016-12-22 |
| 506 | Hatfield, Larry | 85 | — | 13 | 2002-12-28 |
| 507 | Yeoman, Omer | 85 | — | 5 | 1977-05-16 |
| 508 | Dana, Steven William | 84 | — | 6 | 2009-09-19 |
| 509 | Hopson, S. C. | 84 | — | 6 | 1991-06-21 |
| 510 | Dreher, Theodore Albert | 83 | — | 4 | 1987-06-22 |
| 511 | Miles, Edwin | 82 | — | 3 | 1977-05-20 |
| 512 | Baker, Donald K. | 82 | — | 16 | 2012-11-23 |
| 513 | Arnt & Son - Dupage | 82 | — | 2 | 1959-01-01 |
| 514 | Stone, Herald | 81 | — | 7 | 1976-02-06 |
| 515 | Hoover, L. R. | 81 | — | 2 | 1978-09-29 |
| 516 | Lyons Glen | 80 | — | 3 | 1980-07-01 |
| 517 | Snelten, Arthur Charles | 80 | — | 5 | 2004-04-15 |
| 518 | Snelten, A & C | 80 | — | 5 | 2018-10-29 |
| 519 | Gingerich, Emery Duane | 79 | — | 8 | 2017-12-20 |
| 520 | Allabaugh, John H. | 78 | — | 9 | 2001-10-01 |
| 521 | White Bros. Wells | 78 | — | 7 | 2006-09-27 |
| 522 | Dirks, Michael J. | 77 | — | 19 | 1995-10-06 |
| 523 | Shaver, James R. Sr. | 77 | — | 6 | 1997-01-08 |
| 524 | Stone, James | 77 | — | 4 | 1978-12-22 |
| 525 | Harding, Thomas D. | 77 | — | 7 | 2006-10-24 |
| 526 | Quality Farm Equip | 77 | — | 1 | 1959-01-01 |
| 527 | Crowe, Daniel J. | 76 | — | 17 | 2021-04-01 |
| 528 | Wehling, R. H. | 76 | — | 12 | 1993-12-07 |
| 529 | Allabaugh Well Co. | 75 | — | 10 | 2021-05-13 |
| 530 | Chadwick, George | 75 | — | 8 | 1984-11-30 |
| 531 | Brady, C.e. | 75 | — | 7 | 1968-01-01 |
| 532 | Comar Drilling Co., Inc. | 74 | — | 6 | 2014-08-07 |
| 533 | Coppenbarger, Floyd Lyle | 74 | — | 7 | 1987-12-21 |
| 534 | Smith, David M. | 73 | — | 5 | 2021-07-13 |
| 535 | Swanson, L. F. | 73 | — | 7 | 1973-08-04 |
| 536 | Wise, W. P. | 73 | — | 4 | 1978-09-01 |
| 537 | Duke, Albert | 73 | — | 4 | 1967-01-01 |
| 538 | Wehling, Robert | 73 | — | 6 | 2003-09-25 |
| 539 | Macauley, W.r. | 72 | — | 1 | 1943-01-01 |
| 540 | Suburban Well | 72 | — | 7 | 2007-08-10 |
| 541 | Motter, O. L. | 71 | — | 6 | 1974-11-30 |
| 542 | Meyer, George J. | 71 | — | 4 | 2000-06-01 |
| 543 | Mallow | 71 | — | 4 | 1976-10-01 |
| 544 | William H. Crumpler | 70 | — | 1 | 1977-08-01 |
| 545 | Eckel John | 69 | — | 3 | 1947-10-01 |
| 546 | Burgess, Wayne T. | 69 | — | 4 | 1986-11-19 |
| 547 | Snelton, Peter | 68 | — | 4 | 2019-05-24 |
| 548 | Griffy, Cecil D. | 68 | — | 3 | 1976-12-01 |
| 549 | Jennings, Charles L. | 68 | — | 7 | 1974-10-24 |
| 550 | Allen E. Smith | 68 | — | 4 | 2006-06-03 |
| 551 | Wilson, Arnold | 67 | — | 4 | 1979-07-31 |
| 552 | Rosenquist, Gerald | 67 | — | 4 | 1980-09-12 |
| 553 | Klassen, Genevieve Sue | 67 | — | 14 | 1994-11-18 |
| 554 | Hayes, Charles M. | 67 | — | 16 | 1996-06-25 |
| 555 | Vineyard, Gene F. | 67 | — | 2 | 1978-12-10 |
| 556 | Zanker, Joseph I. | 67 | — | 1 | 1973-10-01 |
| 557 | Burgess, Wayne Jr. | 67 | — | 3 | 1978-06-29 |
| 558 | Springer, Howard | 67 | — | 9 | 1979-05-27 |
| 559 | Albrecht Well Drillers | 66 | — | 21 | 2002-07-11 |
| 560 | Pohl, Harold N. | 64 | — | 6 | 1973-06-29 |
| 561 | Sisk, Gary Drill Co. | 63 | — | 6 | 2013-07-01 |
| 562 | Milaeger Well Drilling Co. | 63 | — | 12 | 1977-01-01 |
| 563 | Will-Dupage Drilling | 63 | — | 7 | 1980-06-12 |
| 564 | Larkin Drilling Company | 63 | — | 9 | 1968-12-13 |
| 565 | Bjorklund, Llyod A. | 63 | — | 4 | 1992-03-15 |
| 566 | Schmidt, Daniel L. | 63 | — | 2 | 1958-01-01 |
| 567 | Kelso, James | 63 | — | 5 | 2013-07-16 |
| 568 | Burge Drilling Co. & Dewatering | 63 | — | 1 | 2012-07-12 |
| 569 | Grieves, Clifford | 62 | — | 3 | 2017-02-01 |
| 570 | Galien, Vander Sam | 61 | — | 10 | 2014-06-12 |
| 571 | Layne-Western Drlg | 61 | — | 28 | 2003-02-20 |
| 572 | Knierin Paul | 61 | — | 12 | 1978-06-01 |
| 573 | Boetsch, W. R. | 61 | — | 2 | 1976-10-20 |
| 574 | Rob, Ronald | 61 | — | 3 | 1987-03-12 |
| 575 | Fleming, Roy | 61 | — | 8 | 1986-08-26 |
| 576 | Woodward, Larry A. | 60 | — | 12 | 1992-12-06 |
| 577 | Ebert M & Co. | 60 | — | 6 | 1973-07-01 |
| 578 | Smith Well Drilling | 60 | — | 4 | 2015-11-29 |
| 579 | Raimonde & Sons | 60 | — | 5 | 2019-12-02 |
| 580 | Larson & Swanson | 60 | — | 4 | 1946-01-01 |
| 581 | Neely, Paul C. | 60 | — | 2 | 1969-10-01 |
| 582 | Testing Service Corp. | 59 | — | 4 | 2014-06-23 |
| 583 | Johnson, Charles R. | 59 | — | 3 | 1992-09-21 |
| 584 | Sauder Well Drilling | 59 | — | 8 | 2016-11-01 |
| 585 | Puckett, Arnold | 59 | — | 7 | 1980-11-26 |
| 586 | Adolphson, Bob | 59 | — | 4 | 1980-06-05 |
| 587 | Richey, Quentin | 59 | — | 3 | 1976-08-01 |
| 588 | Hepp, Frank | 59 | — | 3 | 1980-01-01 |
| 589 | Jones, Spencer R. | 58 | — | 2 | 2020-07-07 |
| 590 | Chadwick, George W. | 57 | — | 9 | 1983-12-15 |
| 591 | Stinson, Larry | 57 | — | 6 | 2018-04-01 |
| 592 | O'brien, Edward S. | 57 | — | 1 | 1975-05-01 |
| 593 | Hofstetter Drilling | 57 | — | 4 | 1995-12-30 |
| 594 | Logan, James R. | 56 | — | 6 | 1983-11-15 |
| 595 | Mashburn Brothers | 56 | — | 6 | 1985-01-04 |
| 596 | Burgess, Wayne T. Jr. | 56 | — | 3 | 1980-12-19 |
| 597 | M. & M. Development Company | 56 | — | 2 | 1959-07-01 |
| 598 | Hinkle, Truman | 55 | — | 4 | 1976-08-15 |
| 599 | Luttrel, James | 55 | — | 11 | 1996-12-16 |
| 600 | Balding, Shane | 55 | — | 6 | 2016-08-25 |
| 601 | Brackett, B. | 55 | — | 3 | 1969-12-10 |
| 602 | Hayes & Sims Drlg | 54 | — | 13 | 1952-03-01 |
| 603 | Von Oepen, Ernest | 54 | — | 3 | 1973-05-18 |
| 604 | Cosby, E. L. | 54 | — | 4 | 1972-12-28 |
| 605 | Norris, Marvin | 54 | — | 2 | 1975-04-03 |
| 606 | Sergent, William | 54 | — | 3 | 1978-04-12 |
| 607 | Jennings, James E. | 53 | — | 5 | 1982-11-18 |
| 608 | Tyrrell, Richard | 53 | — | 4 | 1979-09-08 |
| 609 | Mattson, Arthur R. | 53 | — | 2 | 1996-04-01 |
| 610 | Swan, Karl F. | 52 | — | 7 | 2012-05-18 |
| 611 | Touvell Albert R | 52 | — | 2 | 1971-04-01 |
| 612 | C. Martin & Sons Well Co. | 52 | — | 4 | 2006-06-22 |
| 613 | D & M Builders | 52 | — | 3 | 1998-11-01 |
| 614 | Central IL Electric | 52 | — | 2 | 1968-07-01 |
| 615 | Bartmess, John B. | 51 | — | 5 | 1985-07-31 |
| 616 | Yakimisky, John | 51 | — | 4 | 2011-10-06 |
| 617 | Stoneberger, Donald E. | 51 | — | 6 | 1996-10-31 |
| 618 | Layten | 51 | — | 1 | 1973-08-01 |
| 619 | Randy Gebke | 50 | — | 14 | 2005-08-16 |
| 620 | Laczynski, AL | 50 | — | 2 | 1970-11-24 |
| 621 | Liberg Patrick S | 50 | — | 3 | 1979-03-01 |
| 622 | Rice Well Drilling | 50 | — | 1 | 1959-01-01 |
| 623 | Peerless Service Co. | 50 | — | 3 | 1962-07-01 |
| 624 | Pettis | 49 | — | 1 | 1930-01-01 |
| 625 | Huemann, Jos.h. & Sons, Inc. | 49 | — | 2 | 1998-10-02 |
| 626 | Lyons Geo | 48 | — | 2 | 1954-01-01 |
| 627 | Corwin Gingerich | 48 | — | 5 | 2007-05-09 |
| 628 | Brenneisen ,Ross S. | 48 | — | 2 | 1978-07-30 |
| 629 | Michael Dryden | 48 | — | 5 | 2007-07-03 |
| 630 | Grosch, Dick | 47 | — | 10 | 1994-04-02 |
| 631 | Thorne, W. L. Co. | 47 | — | 12 | 1947-07-08 |
| 632 | Stoneberger, Donald | 47 | — | 5 | 1978-07-17 |
| 633 | Smith A J | 47 | — | 2 | 1941-03-01 |
| 634 | Bollivar - Hinrichs Plumbing | 46 | — | 4 | 2007-03-26 |
| 635 | Szymanski, Mitchell J. | 46 | — | 3 | 1979-09-05 |
| 636 | Cook, George Jr. | 45 | — | 10 | 1979-09-01 |
| 637 | Szymanski, Ted J. | 45 | — | 2 | 1978-08-14 |
| 638 | Turner, Martin | 45 | — | 3 | 1977-10-02 |
| 639 | Sutton, Kellie R. | 45 | — | 5 | 1979-12-14 |
| 640 | Brenneisen, S. Ross | 44 | — | 1 | 1977-04-01 |
| 641 | Strange, Michael K. | 44 | — | 2 | 1992-08-27 |
| 642 | Dougherty B J | 44 | — | 1 | 1942-09-01 |
| 643 | Crawford, H. | 43 | — | 6 | 1977-12-05 |
| 644 | Millis, P. E. | 43 | — | 6 | 1946-01-01 |
| 645 | Mashburn, Bruce E. | 43 | — | 5 | 1988-08-18 |
| 646 | Szymanski, Mitchell | 43 | — | 3 | 1983-01-18 |
| 647 | Steve Liberg, Jr. | 43 | — | 8 | 2006-12-23 |
| 648 | Smith, T. H. | 43 | — | 3 | 1949-01-01 |
| 649 | Santelman, Doyle D. | 43 | — | 4 | 1974-06-01 |
| 650 | Coad Stanley M | 43 | — | 5 | 1969-12-23 |
| 651 | Blanchard Well Drilling | 43 | — | 1 | 1960-01-01 |
| 652 | Knapp, C. O. | 43 | — | 1 | 1978-07-09 |
| 653 | Denison Well Drilling | 43 | — | 1 | 1982-08-11 |
| 654 | Brown, Leland E. | 43 | — | 1 | 1994-10-07 |
| 655 | Rosenquist, K. W. | 42 | — | 9 | 1973-05-30 |
| 656 | Carper, Garland L. | 42 | — | 4 | 1979-08-30 |
| 657 | Robert G. Rosenquist | 42 | — | 6 | 2006-07-17 |
| 658 | Varner C W | 42 | — | 13 | 1948-11-01 |
| 659 | IL State Geological Survey | 42 | — | 14 | 2018-08-09 |
| 660 | Ready, Dale | 42 | — | 6 | 2000-06-29 |
| 661 | Layne North-Central | 42 | — | 6 | 1941-03-01 |
| 662 | Gobel, Joseph Louis | 42 | — | 7 | 2015-02-06 |
| 663 | Wieting, John | 42 | — | 2 | 1947-01-01 |
| 664 | Snelten, Cornelius | 42 | — | 3 | 1942-01-01 |
| 665 | Chitty R E | 42 | — | 3 | 1958-01-01 |
| 666 | Winslow, ED F. | 42 | — | 4 | 1976-10-01 |
| 667 | Charles M. Kerry | 41 | — | 3 | 1994-02-21 |
| 668 | Stone, Herald I. | 41 | — | 3 | 1994-02-15 |
| 669 | Woollen Earl D | 41 | — | 4 | 1974-01-01 |
| 670 | Dartwater Well Drlg | 40 | — | 3 | 1974-07-30 |
| 671 | Donald N. Cleary | 40 | — | 7 | 2001-09-19 |
| 672 | Mitchell, Francis M. | 40 | — | 5 | 1976-07-02 |
| 673 | Tascher, Vincent | 40 | — | 1 | 2004-11-24 |
| 674 | Dowdy, Tony Jr. | 39 | — | 5 | 2019-11-18 |
| 675 | Wertz, C. L. | 39 | — | 2 | 1975-09-01 |
| 676 | Bolliger, William | 39 | — | 9 | 1982-06-23 |
| 677 | Santelman, Walter | 39 | — | 2 | 1954-02-01 |
| 678 | Matherly, Lonnie | 38 | — | 10 | 1981-04-18 |
| 679 | Green, William E. | 38 | — | 6 | 1993-11-15 |
| 680 | Pittman, Dale | 38 | — | 4 | 1978-08-01 |
| 681 | Green, William Ernest | 38 | — | 9 | 1999-10-12 |
| 682 | Schmalz, G.a. & Son | 38 | — | 3 | 1967-05-01 |
| 683 | Neely&schimelpfening | 38 | — | 4 | 1955-12-01 |
| 684 | Knierim, James Richard | 38 | — | 2 | 1980-12-01 |
| 685 | Brooks, Rollin W. | 37 | — | 9 | 1975-09-17 |
| 686 | Norman E D | 37 | — | 10 | 1971-05-01 |
| 687 | Randa WM J | 37 | — | 1 | 1960-01-01 |
| 688 | Perrine William | 37 | — | 1 | 1962-01-01 |
| 689 | Dittmeyer, Peter W. | 37 | — | 2 | 1942-01-01 |
| 690 | Vickery Drilling Co., Inc. | 37 | — | 7 | 1966-08-01 |
| 691 | Potts, Paul W. | 37 | — | 3 | 1969-07-25 |
| 692 | J & R Well Drlg. | 36 | — | 9 | 1996-07-08 |
| 693 | Tim Hacker | 36 | — | 6 | 2006-11-20 |
| 694 | Barker, Paul | 36 | — | 4 | 1977-07-30 |
| 695 | Jeff Crank % Harriss Drilling | 35 | — | 2 | 2003-09-22 |
| 696 | Mccord, Daniel | 35 | — | 4 | 1986-10-14 |
| 697 | Eastern Petroleum Company | 35 | — | 1 | 1971-08-01 |
| 698 | Coad Well & Pump Co. | 34 | — | 4 | 1992-05-01 |
| 699 | Hinkle J | 34 | — | 2 | 1976-10-01 |
| 700 | Swanson Well & Pump Serv | 34 | — | 5 | 1995-09-14 |
| 701 | Tyler, John | 34 | — | 2 | 1965-08-01 |
| 702 | Mccaskey, H. | 34 | — | 2 | 1944-01-01 |
| 703 | John E. Liberg | 34 | — | 4 | 2000-05-16 |
| 704 | Huemann, John | 34 | — | 4 | 2015-09-25 |
| 705 | Neely & Son | 34 | — | 1 | 1967-05-01 |
| 706 | Austin, Harry | 34 | — | 1 | 1946-01-01 |
| 707 | Norton, William H. | 34 | — | 3 | 1997-08-31 |
| 708 | Ziegler, Bryan C | 34 | — | 5 | 1982-11-17 |
| 709 | Madsen, Charles & Sons | 34 | — | 1 | 1953-01-01 |
| 710 | Gritzner, Edward John | 34 | — | 2 | 1985-05-08 |
| 711 | Hutchings, James A. | 34 | — | 2 | 1995-05-01 |
| 712 | Lenhart, Jeff Plumbing | 34 | — | 2 | 2008-02-13 |
| 713 | Hanks, T. R. | 34 | — | 2 | 1979-09-10 |
| 714 | Groves, Alan | 33 | — | 4 | 1994-05-02 |
| 715 | Mcraven, Claude | 33 | — | 3 | 1973-02-25 |
| 716 | Livingston, William B. | 33 | — | 4 | 1976-10-15 |
| 717 | Toops, Floyd | 33 | — | 2 | 1980-09-01 |
| 718 | Kramer, Claude E. | 33 | — | 1 | 1946-03-07 |
| 719 | Gray Well Drlg | 33 | — | 8 | 1940-07-01 |
| 720 | Murdoch, James J. | 33 | — | 5 | 1992-06-10 |
| 721 | Stanley, Charles Joseph | 33 | — | 2 | 2000-11-14 |
| 722 | Roe, Ronald | 33 | — | 4 | 2018-07-18 |
| 723 | Lyons G A | 33 | — | 3 | 1949-01-01 |
| 724 | Bush, Richard W. | 32 | — | 6 | 1990-09-14 |
| 725 | Whiston, George Jr. | 32 | — | 4 | 1990-06-15 |
| 726 | Knierim James Muelle | 32 | — | 4 | 1980-12-01 |
| 727 | Neupert, Thomas A. | 32 | — | 9 | 1989-05-09 |
| 728 | Mumma Drilling Inc. | 32 | — | 1 | 1977-09-20 |
| 729 | Miles, Randolph S. | 32 | — | 1 | 1978-10-20 |
| 730 | Ebert Co. | 32 | — | 2 | 1979-06-02 |
| 731 | Denison, Gary S. | 32 | — | 1 | 1984-11-13 |
| 732 | Varner Well Drilling | 31 | — | 10 | 1953-09-01 |
| 733 | Hinrichs, Shane M. | 31 | — | 3 | 2020-09-29 |
| 734 | Niffeneger, Edward L. | 31 | — | 4 | 1995-12-05 |
| 735 | Klein, Paul Steve | 31 | — | 2 | 1995-04-26 |
| 736 | Ferguson, F. H. | 31 | — | 1 | 1918-01-01 |
| 737 | Beaman, John | 31 | — | 1 | 1976-10-01 |
| 738 | Bilsky, J. W. | 30 | — | 1 | 1970-03-21 |
| 739 | Buchanan, Ruben C. | 30 | — | 4 | 1972-10-23 |
| 740 | Ayrshire Collieries Corp | 30 | — | 1 | 1946-11-01 |
| 741 | Biggerstaff, Dr. James | 30 | — | 1 | 1978-07-01 |
| 742 | Dudley Drillers | 29 | — | 5 | 1971-02-11 |
| 743 | Whiston, George N. | 29 | — | 5 | 1978-07-18 |
| 744 | Snelton, Cornelius | 29 | — | 2 | 1942-01-01 |
| 745 | James Layten | 29 | — | 5 | 2006-09-01 |
| 746 | Bill Sosnowski | 29 | — | 3 | 1999-08-23 |
| 747 | Sigrist, Charlie F. | 29 | — | 2 | 1972-01-01 |
| 748 | Watson, Harold L. | 29 | — | 3 | 1958-01-01 |
| 749 | Ebert, Chris Drilling | 29 | — | 2 | 1974-06-01 |
| 750 | Calhoun Drlg. Co. | 28 | — | 6 | 1983-08-01 |
| 751 | Caper, Garland | 28 | — | 4 | 1973-03-14 |
| 752 | Adkins, Phillip G. | 28 | — | 4 | 1998-08-25 |
| 753 | Kelly Drilling Co. | 28 | — | 5 | 1965-01-01 |
| 754 | Bekemeyer, Gustav F. | 28 | — | 4 | 1975-07-01 |
| 755 | York, Warren T. | 28 | — | 1 | 1969-12-20 |
| 756 | Kelley, A.g. | 28 | — | 4 | 1966-04-18 |
| 757 | Woodward, Lawrence F. | 28 | — | 5 | 1978-09-01 |
| 758 | Schlesser & Sons | 28 | — | 3 | 1949-07-01 |
| 759 | Hedges, W.h. | 28 | — | 1 | 1929-01-01 |
| 760 | Neidig Brothers | 28 | — | 1 | 1941-01-01 |
| 761 | Warth, Bill | 27 | — | 4 | 1992-09-22 |
| 762 | Lutes Orville & Sons | 27 | — | 4 | 1974-02-09 |
| 763 | John J. Thompson | 27 | — | 2 | 1996-12-02 |
| 764 | Rediger, Dan | 27 | — | 5 | 1979-08-20 |
| 765 | Eaton, Virgil | 27 | — | 2 | 1958-09-01 |
| 766 | Neely & Etal | 27 | — | 3 | 1946-07-01 |
| 767 | Keen, George E. | 27 | — | 9 | 1995-04-25 |
| 768 | Joliet Pump Co. | 27 | — | 2 | 1962-01-01 |
| 769 | Schmeiser Kenneth S | 27 | — | 4 | 1974-09-10 |
| 770 | Teeple C F | 27 | — | 2 | 1949-01-01 |
| 771 | Walter Hatton | 27 | — | 1 | 1972-06-09 |
| 772 | Hoyle Well & Pump | 27 | — | 3 | 1979-12-05 |
| 773 | IL State Water Survey | 26 | — | 19 | 2003-06-05 |
| 774 | Neely Cliff L | 26 | — | 5 | 1968-09-01 |
| 775 | Tegeler, Brian J. | 26 | — | 12 | 2012-06-26 |
| 776 | Mumma Bros Drilling Inc. | 26 | — | 5 | 2002-06-26 |
| 777 | Mcellhiney Wm. Sr. | 26 | — | 8 | 1979-05-01 |
| 778 | Stone, H. I. | 26 | — | 3 | 1976-05-01 |
| 779 | Midwest Well Drlg | 26 | — | 1 | 1959-01-01 |
| 780 | Harmon, Bill | 26 | — | 3 | 1980-03-01 |
| 781 | Haverstick Well & Equp | 26 | — | 9 | 1964-02-01 |
| 782 | Wills, Elmer D. | 26 | — | 3 | 1995-09-11 |
| 783 | Holdorf Donald | 26 | — | 3 | 1969-11-01 |
| 784 | Johnson, Joel H | 26 | — | 2 | 2019-12-31 |
| 785 | Ben D Ruble | 26 | — | 1 | 1963-05-21 |
| 786 | Relander, August | 26 | — | 1 | 1933-01-01 |
| 787 | Phillip Services (Env.) | 26 | — | 2 | 2001-10-17 |
| 788 | U S Army Corp OF Eng | 26 | — | 1 | 1942-09-01 |
| 789 | Chadwick, G. W. | 25 | — | 8 | 1979-10-20 |
| 790 | Shoemaker, Cole | 25 | — | 4 | 1996-01-31 |
| 791 | Sandefur, Donald E. | 25 | — | 8 | 1986-11-25 |
| 792 | Martin, Jonas | 25 | — | 7 | 1992-07-14 |
| 793 | Blankenship, Bill | 25 | — | 9 | 2016-12-10 |
| 794 | Texaco, Inc. | 25 | — | 9 | 1983-10-29 |
| 795 | Schlesser F & Sons | 25 | — | 3 | 1948-12-31 |
| 796 | James Harding | 25 | — | 3 | 1993-12-28 |
| 797 | Leasure, Arthur C. | 25 | — | 4 | 1998-10-18 |
| 798 | Gorlo, E. R. | 25 | — | 1 | 1960-01-01 |
| 799 | Brotcke Engineering | 25 | — | 12 | 2003-08-16 |
| 800 | Geer, Alonzo W. | 25 | — | 4 | 1974-06-28 |
| 801 | Jenson Kenneth | 25 | — | 1 | 1983-03-16 |
| 802 | Madsen, Wilbur C. | 25 | — | 2 | 1986-02-13 |
| 803 | Raney, Sherman L. | 25 | — | 2 | 1980-11-12 |
| 804 | Twigg Brothers | 25 | — | 1 | 1943-06-01 |
Best well drillers by county
County-level rankings — who actually drills where, by wells on record.
- Adams County (32)
- Alexander County (24)
- Bond County (31)
- Boone County (95)
- Brown County (14)
- Bureau County (72)
- Calhoun County (23)
- Carroll County (79)
- Cass County (48)
- Champaign County (93)
- Christian County (64)
- Clark County (52)
- Clay County (39)
- Clinton County (57)
- Coles County (56)
- Cook County (178)
- Crawford County (50)
- Cumberland County (42)
- Dekalb County (124)
- Dewitt County (60)
- Douglas County (50)
- Dupage County (155)
- Edgar County (40)
- Edwards County (21)
- Effingham County (42)
- Fayette County (48)
- Ford County (59)
- Franklin County (19)
- Fulton County (62)
- Gallatin County (43)
- Greene County (48)
- Grundy County (100)
- Hamilton County (25)
- Hancock County (32)
- Hardin County (20)
- Henderson County (48)
- Henry County (94)
- Iroquois County (89)
- Jackson County (41)
- Jasper County (46)
- Jefferson County (33)
- Jersey County (38)
- Jo Daviess County (60)
- Johnson County (28)
- Kane County (178)
- Kankakee County (80)
- Kendall County (110)
- Knox County (57)
- Lake County (154)
- Lasalle County (148)
- Lawrence County (34)
- Lee County (113)
- Livingston County (100)
- Logan County (82)
- Macon County (72)
- Macoupin County (43)
- Madison County (68)
- Marion County (32)
- Marshall County (65)
- Mason County (70)
- Massac County (25)
- Mcdonough County (47)
- Mchenry County (193)
- Mclean County (86)
- Menard County (58)
- Mercer County (60)
- Monroe County (47)
- Montgomery County (55)
- Morgan County (50)
- Moultrie County (42)
- Ogle County (131)
- Peoria County (109)
- Perry County (16)
- Piatt County (49)
- Pike County (55)
- Pope County (24)
- Pulaski County (23)
- Putnam County (54)
- Randolph County (45)
- Richland County (40)
- Rock Island County (82)
- Saline County (22)
- Sangamon County (60)
- Schuyler County (49)
- Scott County (38)
- Shelby County (57)
- St. Clair County (68)
- Stark County (48)
- Stephenson County (69)
- Tazewell County (105)
- Union County (28)
- Vermilion County (80)
- Wabash County (26)
- Warren County (48)
- Washington County (37)
- Wayne County (39)
- White County (38)
- Whiteside County (89)
- Will County (130)
- Williamson County (23)
- Winnebago County (119)
- Woodford County (82)
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