⟁ Wisconsin Well Data field records · 2026 survey

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Best well drillers in Marathon County, Wisconsin

Not a pay-to-play list: these are the 110 drilling companies with wells on record in Marathon County, ranked by wells actually drilled here — 12,730 logged wells in the Wisconsin Department of Natural Resources Groundwater Retrieval Network (GRN) well-construction records (records as of 2026-08-14). Every number links back to the public record.

110companies on record
34active since 2022
12,730wells in county record
#CompanyIn Marathon Co. since 2016All-time in countyStatewide
1 Drews Well Drilling Inc. 441 446 1,162
2 Lang Well Drilling Co. Inc. 341 2,406 2,591
3 Hornung, James JR 319 319 532
4 Brunner Well Drilling LLC 222 240 1,060
5 Haupt Well Drlg Inc. 165 406 1,723
6 Heeg Well And Pump LLC 135 174 1,276
7 James Hornung JR 99 2,165 3,499
8 Lang Roger D 48 143 147
9 Hornung JR, James 42 42 69
10 Dj's Water Service 36 95 1,216
11 Bertram Junemann Well Drilling Inc. 32 94 4,104
12 All American Well & Pump 30 105 890
13 Haupt Well & Pump Co. Inc. 28 613 2,807
14 Shawano Well Drilling Inc. 22 87 3,990
15 Komarek, Ronald A SR 21 21 1,080
16 Hornung Well Drlg LLC 14 15 30
17 Edward J Drews 9 1,387 2,070
18 Hintzke Well Drilling Inc. 9 11 4,365
19 Midwest Well Drilling & Hydrofracking LLC 6 6 1,452
20 Culton Water Wells & Pump Services 5 5 153
21 Jelinek Well Drilling Inc. 4 7 5,674
22 Drews Edward J 3 90 140
23 C T W Corp 3 4 149
24 Komarek, Theodore 3 3 301
25 Municipal Well & Pump/Midwest Well 3 3 70
26 Ronald A Komarek SR 2 33 4,389
27 Luisier Well Drilling Inc. 2 12 12,107
28 Rhinelander Well Drilling Inc. 2 8 5,196
29 H2o Well Drilling & Pump Service 2 4 1,054
30 Van DE Yacht Leo Well Drilling Inc. 2 3 8,998
31 Ground Source Inc. 2 2 2,237
32 Rock Solid Well Drilling LLC 2 2 71
33 Chets Plbg & Htg Inc. 2 2 58
34 Midwest Hydrofracking LLC 2 2 1,135
35 Komarek SR, Ronald A 2 2 338
36 Jesse W Brunner 1 511 2,585
37 Sam's Well Drilling Inc. 1 4 21,895
38 T & T Well Drilling & Pump Service 1 3 1,347
39 Oium, Kelly Well Drilling Inc. 1 1 1,018
40 Hezpaz Enterprizes 1 1 152
41 Vetter, William 1 1 86
42 Roth Well Drillling 1 1 224
43 William D Brunner — 868 3,124
44 Haupt Well @ Pump Co. Inc. — 412 1,673
45 Sylvester R Haupt — 345 1,031
46 Brian Heeg — 238 1,195
47 Brunner William D — 177 595
48 James A Hornung — 140 402
49 Heeg Well Drlg LLC — 119 842
50 Hornung James A — 91 194
51 Kline Well @ Pump Inc. — 88 794
52 Heeg Brian — 74 190
53 Rick Brandl — 73 280
54 Kline Well & Pump Inc. — 72 533
55 Donald J Firkus SR — 55 502
56 Koeppel Phil Well Drlg LLC — 49 1,621
57 Soik R J Plbg & Htg Inc. — 44 1,060
58 Lang — 37 40
59 Rudys Contracting Inc. — 33 68
60 Haupt Sylvester R — 30 136
61 Bertram Junemann Well Drilling I — 29 955
62 Soik R J Plbg @ Htg Inc. — 29 410
63 James A Hornung SR — 29 116
64 Dillenburg Daniel — 24 276
65 Ditter Well Drilling Inc. — 23 303
66 Haupt — 23 77
67 Philip J Koeppel — 21 1,316
68 Brunner — 14 34
69 Koeppel Philip J — 13 321
70 Layne Christensen Company — 12 222
71 Richardson WD/Ertl Enterprises Inc. — 8 3,556
72 Daniel Dillenburg — 8 77
73 Roberts Irrigation Co. Inc. — 6 140
74 Mercer Well Drilling LLC — 6 388
75 Frank L Schroeder — 6 28
76 Bertram Junemann WD Inc. — 5 323
77 Peter Laskowski — 5 68
78 Edward J Gritzner — 3 655
79 Nehls @ Webster Well Drilling — 3 589
80 Bill Van DE Yacht — 3 84
81 Chets Plbg @ Htg Inc. — 3 69
82 Rutherford Well Drlg Inc. — 2 272
83 Daniel J Steffes — 2 4,646
84 Kleiman Pump @ Well Drilling Inc. — 2 373
85 Jenks Larry L — 2 58
86 Nehls & Webster Well Drilling — 1 2,122
87 Webster Well Drilling Inc. — 1 3,928
88 Sams Rotary Drillers Inc. — 1 12,103
89 Michael Hartman — 1 5,782
90 Van DE Yacht Bill Wtr Well & Specia — 1 3,200
91 Central Well Drilling LLC — 1 2,757
92 Bruce A Walker — 1 1,325
93 Patrick J Lahr — 1 1,066
94 Ace Well Drilling Inc. — 1 858
95 Christopher J Olson — 1 733
96 Terry Farago — 1 635
97 Edwin D Greenfield — 1 570
98 Karl M Walker — 1 499
99 Tipler Well @ Pump — 1 288
100 Terrence Beckley — 1 231
101 Jelinek David C — 1 224
102 John D Zouski — 1 214
103 John D Dillenburg — 1 208
104 Richard L Umland — 1 176
105 Beckley Terrence — 1 152
106 C & H Sprinklers & Landscaping — 1 32
107 Eron&gee/Hermans Plbg & Htg Inc. — 1 32
108 Layne Northwest Company — 1 30
109 Layne Western Co. Inc. — 1 26
110 Alpha Drilling Service — 1 26

Ranked by wells drilled in Marathon County since 2016 (then all-time), from the full WI DNR record. A ★ marks a featured sponsor — sponsors must appear in the county record to be listed, and the ranking below them is never reordered.

Who drills the most wells in Marathon County?

Drews Well Drilling Inc. has drilled the most Marathon County wells in the recent record — 441 since 2016, 446 in the county all-time.

How many well drilling companies work in Marathon County?

110 companies in the WI DNR record have drilled wells in Marathon County; 34 of them have drilled somewhere in Wisconsin since 2022. Smaller operators below the record threshold may also serve the area.

How deep is a typical well in Marathon County?

The median drilled depth in Marathon County is 140 ft, based on 26,449 recorded wells. Depths, water levels, and yields are on the Marathon County wells page.

Well depths, static water levels, tested yields, and drilling cost estimates for this county live on the Marathon County wells page.

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