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 2026-08-20). 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	197
2	Brad Snelten	55	55	147
3	Snelten, Greg	30	180	1,298
4	Huemann, Joseph J.	24	57	4,619
5	Knierim, Ken/K & K Well Drlg.	23	25	831
6	Stinnett, David	22	98	1,658
7	Will County Well & Pump	20	57	724
8	Schwall, John J.	14	94	245
9	Jason Jablonski	7	8	89
10	Durbin, Dominique	6	6	102
11	Fischer, James Monroe	5	148	532
12	Matt Liberg	5	5	180
13	Michael C. Richards	4	4	59
14	Snelten, Jeffrey	3	237	1,958
15	Jablonski, John A.	3	6	246
16	Tri County Irrigation &	3	3	39
17	Sharpe, Franklin N.	2	412	2,123
18	Senffner, Alan James	1	184	1,250
19	Wehling, Richard W.	1	11	123
20	Municipal Well & Pump, Inc.	1	2	49
21	Knierim, Phil	—	657	5,361
22	Foyle, Richard S.	—	506	657
23	Efflandt, Robert	—	501	1,673
24	Fykes, Charles N.	—	443	5,947
25	Snelten, Richard Charles	—	397	2,177
26	Gaffke, George E.	—	264	4,817
27	Walters, Larry	—	227	1,465
28	Rob, Ronald Gene	—	215	2,075
29	Pilgard, Peter	—	213	673
30	K & K Well Drilling	—	208	3,028
31	Wehling Well Works, Inc.	—	185	755
32	Knierum, Paul	—	173	296
33	Layne Western Co., Inc.	—	172	1,442
34	Snelten, Stephen A.	—	153	698
35	Foyle, Bert	—	153	153
36	Stinnett, James R.	—	146	309
37	L. J. Macauley & Sons	—	146	146
38	Knierim, Paul L.	—	143	834
39	Holleman, Herbert	—	134	317
40	Miller, J.p. Artesian Well Co.	—	127	300
41	Wellendorf, Rodney	—	125	2,313
42	Glenn, E. H.	—	123	193
43	Lode, Lawrence James	—	121	179
44	Potrykos, Frank	—	118	118
45	Hutchings, Clyde A.	—	109	321
46	Pilgard, Peter & Son	—	94	103
47	Efflandt, Herman John	—	88	183
48	Dupage Pump	—	87	1,094
49	Wehling, Wendell E.	—	87	583
50	Snelton Bros.	—	85	97
51	Geiger, S. B.	—	82	113
52	Miller, J. P. Art. Well	—	77	291
53	Fordonski, Keith	—	72	1,622
54	Macauley, W.r.	—	72	72
55	Pilgard, Peter & Sons	—	66	188
56	Boysen, Henry Co.	—	65	346
57	Kuehn, Kurt	—	64	144
58	Sisson, Edward	—	62	499
59	Matherly, Hubert	—	61	1,477
60	Holleman, H.	—	60	131
61	Wehling, E. C.	—	59	245
62	Raimonde & Sons	—	56	60
63	Liberg, Patrick A.	—	55	779
64	Rieke Well Drilling Co.	—	51	179
65	Snelton, Peter	—	51	68
66	Hart - Will-Dupage Drilling	—	50	125
67	Rob, Peter	—	49	1,142
68	Miller, J.p. Co.	—	47	136
69	Wehling, Richard H.	—	46	312
70	Szymanski, Ted J.	—	44	45
71	Snelten, Arthur Charles	—	43	80
72	Senffner, Keith	—	40	209
73	Holleman, Herbert Jr.	—	40	181
74	Jurs Martin&sons Inc.	—	40	89
75	Wieting, John	—	39	42
76	Milaeger Well Drilling Co.	—	35	63
77	Snelten, Cornelius	—	35	42
78	Meadow Equipment	—	34	781
79	Liberg, Steven Scott	—	34	377
80	Kramer, Claude E.	—	33	33
81	Liberg, John E.	—	32	346
82	Von Oepen, Ernest	—	32	54
83	Szymanski, Mitchell	—	32	43
84	Mccaskey, H.	—	32	34
85	Jurs, Martin & Son	—	30	419
86	Huemann, William F.	—	29	4,133
87	Knierim, Phillip E.	—	29	292
88	Hoover, Lonny R.	—	26	1,357
89	H2o Well & Pump Co.	—	26	250
90	Wehling, R. H.	—	26	76
91	Liberg, Thomas P.	—	25	357
92	Will-Dupage Drilling	—	24	63
93	Szymanski, Mitchell J.	—	24	46
94	Snelton, Cornelius	—	23	29
95	Kerry, Charles M.	—	21	535
96	Liberg, Paul Evan	—	21	205
97	Thorne, W. L. Co.	—	21	47
98	Huemann, John J.	—	18	298
99	Boysen, Henry Co.,Lichter,John	—	17	104
100	Bisping, Calvin	—	16	437
101	Hayes & Sims	—	16	115
102	Knierim, Max	—	16	114
103	Comar Drilling Co., Inc.	—	16	74
104	Rosenquist, K. W.	—	16	42
105	Yeoman, Omer	—	15	85
106	Schlesser & Sons	—	15	28
107	Henry Boysen Co.,Lichter,John	—	12	268
108	DU Page Pump Inc.	—	12	161
109	Gray Well Drlg	—	12	33
110	Pilgard, John P.	—	11	606
111	Carson, James R.	—	11	101
112	Roberts Environmental	—	10	30
113	Dietzman, Gerald E.	—	10	1,210
114	Tri County Well & Pump	—	10	289
115	Rosset, Richard D.	—	10	150
116	Layne & Western Co.	—	10	110
117	Shaver, James R. Sr.	—	10	77
118	Hoover Water Well Service	—	9	867
119	Liberg, Steve Jr.	—	8	666
120	Knierim, James	—	8	897
121	Stanley, Charles	—	8	213
122	Hoover Water Well Servic	—	8	98
123	Ward, Delbert G.	—	7	203
124	Keller, Larry	—	6	927
125	Neely, Mark S.	—	6	1,091
126	Brooks, Rollin W.	—	6	37
127	Tyler, John	—	6	34
128	Matthesius, Fred H.	—	5	1,282
129	Moore, John V.	—	5	106
130	Yakimisky, John	—	5	51
131	John E. Liberg	—	5	34
132	Mcellhiney Wm. Sr.	—	5	26
133	Boetsch, William M.	—	4	964
134	Sission, Edward H.	—	4	291
135	Buffington, G.	—	4	130
136	Snelten, A & C	—	4	80
137	Suburban Well	—	4	72
138	Burgess, Wayne T. Jr.	—	4	56
139	Murdoch, James J.	—	4	33
140	Neeley, Harry C.	—	3	455
141	Barker, Paul A.	—	3	181
142	Baker, Paul A.	—	3	137
143	Boetsch, W. R.	—	3	61
144	Schlesser F & Sons	—	3	25
145	Weirich, William Theodore	—	2	568
146	Strange, Robert E.	—	2	558
147	Acker, Norman L.	—	2	194
148	Pitz, N. L.	—	2	186
149	Kerry, Charles	—	2	126
150	Hall, Edward - Web Well & Pump	—	2	89
151	Burgess, Wayne T.	—	2	69
152	Knierin Paul	—	2	61
153	Brackett, B.	—	2	55
154	Liberg Patrick S	—	2	50
155	Varner C W	—	2	42
156	Barker, Paul	—	2	36
157	Knierim James Muelle	—	2	32
158	Albrecht, Harold Dean	—	1	1,132
159	Area Well & Pump	—	1	755
160	Layne Christensen Co.	—	1	49
161	Brown, Darwin	—	1	2,130
162	Wertz, Charles L.	—	1	580
163	Forder, James	—	1	577
164	Neely, Harry C.	—	1	532
165	NO Company	—	1	508
166	Pitz, John W.	—	1	317
167	John A. Jablonski	—	1	302
168	Elfmann, Larry T.	—	1	198
169	Aneffco Well Drilling	—	1	175
170	Diebold Chester C	—	1	149
171	Hoover, L. R.	—	1	81
172	Wehling, Robert	—	1	73
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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