Best well drillers in Cook County, Illinois

Not a pay-to-play list: these are the 178 drilling companies with wells on record in Cook County, ranked by wells actually drilled here — 10,316 logged wells in the Illinois State Geological Survey water well records (records as of 2026-10-12). Every number links back to the public record.

178companies on record

25active since 2022

10,316wells in county record

#	Company	In Cook Co. since 2016	All-time in county	Statewide
1	Schmalfeldt, Todd	55	59	200
2	Brad Snelten	55	55	149
3	Snelten, Greg	30	180	1,307
4	Huemann, Joseph J.	24	57	4,656
5	Knierim, Ken/K & K Well Drlg.	23	25	891
6	Stinnett, David	22	98	1,830
7	Will County Well & Pump	20	57	832
8	Schwall, John J.	14	94	247
9	Jason Jablonski	7	8	89
10	Durbin, Dominique	6	6	109
11	Fischer, James Monroe	5	148	532
12	Matt Liberg	5	5	182
13	Michael C. Richards	4	4	59
14	Snelten, Jeffrey	3	237	1,979
15	Jablonski, John A.	3	6	248
16	Tri County Irrigation &	3	3	40
17	Sharpe, Franklin N.	2	412	2,247
18	Senffner, Alan James	1	184	1,253
19	Wehling, Richard W.	1	11	132
20	Municipal Well & Pump, Inc.	1	2	56
21	Knierim, Phil	—	657	5,399
22	Foyle, Richard S.	—	506	659
23	Efflandt, Robert	—	501	1,683
24	Fykes, Charles N.	—	443	6,006
25	Snelten, Richard Charles	—	397	2,194
26	Gaffke, George E.	—	264	4,869
27	Walters, Larry	—	227	1,525
28	Rob, Ronald Gene	—	215	2,082
29	Pilgard, Peter	—	213	673
30	K & K Well Drilling	—	208	3,047
31	Wehling Well Works, Inc.	—	185	797
32	Knierum, Paul	—	173	298
33	Layne-Western Co.	—	172	1,635
34	Snelten, Stephen A.	—	153	700
35	Foyle, Bert	—	153	153
36	Stinnett, James R.	—	146	314
37	L. J. Macauley & Sons	—	146	146
38	Knierim, Paul L.	—	143	850
39	Holleman, Herbert	—	134	321
40	Miller, J.p. Artesian Well Co.	—	127	317
41	Wellendorf, Rodney	—	125	2,319
42	Glenn, E. H.	—	123	198
43	Lode, Lawrence James	—	121	180
44	Potrykos, Frank	—	118	118
45	Hutchings, Clyde A.	—	109	321
46	Pilgard, Peter & Son	—	94	103
47	Efflandt, Herman John	—	88	185
48	Dupage Pump	—	87	1,095
49	Wehling, Wendell E.	—	87	590
50	Snelton Bros.	—	85	97
51	Geiger, S. B.	—	82	114
52	Miller, J. P. Art. Well	—	77	299
53	Fordonski, Keith	—	72	1,694
54	Macauley, W.r.	—	72	72
55	Pilgard, Peter & Sons	—	66	190
56	Boysen, Henry Co.	—	65	350
57	Kuehn, Kurt	—	64	144
58	Sisson, Edward	—	62	502
59	Matherly, Hubert	—	61	1,534
60	Holleman, H.	—	60	131
61	Wehling, E. C.	—	59	271
62	Raimonde & Sons	—	56	63
63	Liberg, Patrick A.	—	55	780
64	Rieke Well Drilling Co.	—	51	181
65	Snelton, Peter	—	51	68
66	Hart - Will-Dupage Drilling	—	50	128
67	Rob, Peter	—	49	1,154
68	Miller, J.p. Co.	—	47	146
69	Wehling, Richard H.	—	46	319
70	Szymanski, Ted J.	—	44	45
71	Snelten, Arthur Charles	—	43	81
72	Senffner, Keith	—	40	210
73	Holleman, Herbert Jr.	—	40	182
74	Jurs Martin&sons Inc.	—	40	89
75	Wieting, John	—	39	46
76	Milaeger Well Drilling Co.	—	35	63
77	Snelten, Cornelius	—	35	43
78	Meadow Equipment	—	34	787
79	Liberg, Steven Scott	—	34	378
80	Kramer, Claude E.	—	33	33
81	Liberg, John E.	—	32	346
82	Von Oepen, Ernest	—	32	55
83	Szymanski, Mitchell	—	32	43
84	Mccaskey, H.	—	32	34
85	Jurs, Martin & Son	—	30	420
86	Huemann, William F.	—	29	4,147
87	Knierim, Phillip E.	—	29	301
88	Hoover, Lonny R.	—	26	1,362
89	H2o Well & Pump Co.	—	26	252
90	Wehling, R. H.	—	26	78
91	Liberg, Thomas P.	—	25	357
92	Will-Dupage Drilling	—	24	64
93	Szymanski, Mitchell J.	—	24	46
94	Snelton, Cornelius	—	23	29
95	Kerry, Charles M.	—	21	538
96	Liberg, Paul Evan	—	21	205
97	Thorne, W. L. Co.	—	21	49
98	Huemann, John J.	—	18	302
99	Boysen, Henry Co.,Lichter,John	—	17	105
100	Bisping, Calvin	—	16	465
101	Hayes & Sims	—	16	124
102	Knierim, Max	—	16	115
103	Comar Drilling Co., Inc.	—	16	94
104	Rosenquist, K. W.	—	16	43
105	Yeoman, Omer	—	15	86
106	Schlesser & Sons	—	15	28
107	Henry Boysen Co.,Lichter,John	—	12	272
108	DU Page Pump Inc.	—	12	161
109	Gray Well Drlg	—	12	35
110	Pilgard, John P.	—	11	607
111	Carson, James R.	—	11	101
112	Roberts Environmental	—	10	34
113	Dietzman, Gerald E.	—	10	1,227
114	Tri County Well & Pump	—	10	298
115	Rosset, Richard D.	—	10	151
116	Layne & Western Co.	—	10	114
117	Shaver, James R. Sr.	—	10	78
118	Hoover Water Well Service	—	9	872
119	Liberg, Steve Jr.	—	8	706
120	Knierim, James	—	8	900
121	Stanley, Charles	—	8	213
122	Hoover Water Well Servic	—	8	98
123	Ward, Delbert G.	—	7	206
124	Keller, Larry	—	6	939
125	Neely, Mark S.	—	6	1,105
126	Brooks, Rollin W.	—	6	37
127	Tyler, John	—	6	34
128	Matthesius, Fred H.	—	5	1,282
129	Moore, John V.	—	5	108
130	Yakimisky, John	—	5	54
131	John E. Liberg	—	5	34
132	Mcellhiney Wm. Sr.	—	5	26
133	Boetsch, William M.	—	4	967
134	Sission, Edward H.	—	4	292
135	Buffington, G.	—	4	147
136	Snelten, A & C	—	4	82
137	Suburban Well	—	4	72
138	Burgess, Wayne T. Jr.	—	4	56
139	Murdoch, James J.	—	4	33
140	Neeley, Harry C.	—	3	456
141	Barker, Paul A.	—	3	182
142	Baker, Paul A.	—	3	137
143	Boetsch, W. R.	—	3	63
144	Schlesser F & Sons	—	3	25
145	Weirich, William Theodore	—	2	577
146	Strange, Robert E.	—	2	568
147	Acker, Norman L.	—	2	195
148	Pitz, N. L.	—	2	187
149	Kerry, Charles	—	2	127
150	Hall, Edward - Web Well & Pump	—	2	96
151	Burgess, Wayne T.	—	2	69
152	Knierin Paul	—	2	63
153	Brackett, B.	—	2	56
154	Liberg Patrick S	—	2	50
155	Varner C W	—	2	44
156	Barker, Paul	—	2	37
157	Knierim James Muelle	—	2	32
158	Albrecht, Harold Dean	—	1	1,157
159	Area Well & Pump	—	1	792
160	Layne Christensen Co.	—	1	58
161	Brown, Darwin	—	1	2,166
162	Forder, James	—	1	610
163	Wertz, Charles L.	—	1	584
164	NO Company	—	1	564
165	Neely, Harry C.	—	1	534
166	Pitz, John W.	—	1	318
167	John A. Jablonski	—	1	306
168	Elfmann, Larry T.	—	1	198
169	Aneffco Well Drilling	—	1	177
170	Diebold Chester C	—	1	149
171	Hoover, L. R.	—	1	81
172	Wehling, Robert	—	1	78
173	Vineyard, Gene F.	—	1	67
174	Testing Service Corp.	—	1	59
175	Laczynski, AL	—	1	50
176	Millis, P. E.	—	1	43
177	Wertz, C. L.	—	1	39
178	Huemann, John	—	1	34

Ranked by wells drilled in Cook County since 2016 (then all-time), from the full ISGS 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 Cook County?

Schmalfeldt, Todd has drilled the most Cook County wells in the recent record — 55 since 2016, 59 in the county all-time.

How many well drilling companies work in Cook County?

178 companies in the ISGS record have drilled wells in Cook County; 25 of them have drilled somewhere in Illinois since 2022. Smaller operators below the record threshold may also serve the area.

How deep is a typical well in Cook County?

The median drilled depth in Cook County is 200 ft, based on 11,688 recorded wells. Depths, water levels, and yields are on the Cook County wells page.

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

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