Best well drillers in Flathead County, Montana

Not a pay-to-play list: these are the 154 drilling companies with wells on record in Flathead County, ranked by wells actually drilled here — 19,747 logged wells in Montana Bureau of Mines and Geology Ground Water Information Center (GWIC) (records as of 2026-10-26). Every number links back to the public record.

154companies on record

58active since 2022

19,747wells in county record

#	Company	In Flathead Co. since 2016	All-time in county	Statewide
1	Billmayer Drilling	524	2,535	3,233
2	Davis Brothers Drilling	430	432	1,016
3	OH Well Drilling And Pump	416	461	900
4	Glazier Drilling	404	1,419	1,745
5	Chambers Drilling Company	392	2,027	2,248
6	Coldwater Drilling And Pumps	388	388	602
7	Allwest Drilling Inc.	329	693	1,694
8	RM Drilling And Well Services	327	327	389
9	Okeefe Drilling Co.	199	274	8,901
10	Erickson Drilling & Pump Co.	88	704	803
11	Aquasource Drilling LLC	86	88	1,111
12	Rabco Services Inc.	68	77	80
13	Cascade Drilling LP	60	85	718
14	Gove Contracting	53	53	55
15	Certified Well And Pump	52	70	498
16	Post Pump And Drilling LLC	35	35	258
17	Ace Drilling	33	63	947
18	Alto Well And Pump, LLC	28	28	40
19	Sudan Drilling	27	1,826	1,984
20	Evensix Inc. Dba Allwest Drilling	25	25	36
21	Joe Liss Water Wells, Inc.	24	48	501
22	Cyclone Drilling Inc.	17	128	651
23	Water Resource Services	17	17	65
24	Aquasource Inc. LLC	17	17	497
25	Boland Drilling	16	26	1,817
26	AK Drilling Inc.	14	17	1,314
27	Beyer Drilling	13	18	44
28	Ponderosa Drilling LLC	13	13	25
29	Haz Tech Drilling Inc.	12	15	2,139
30	West Central Environmental Consultants	10	12	311
31	Environmental West Exploration	9	18	329
32	Luce Drilling	8	30	66
33	SK Geotechnical Co.	8	12	439
34	Universal Drilling	7	10	1,147
35	MT Dept OF Transportation	5	153	5,869
36	Western Water Wells	5	5	1,188
37	Jacobson Drilling	5	5	612
38	Stinger Drilling	4	88	127
39	North Star Drilling Inc.	4	4	236
40	Pioneer Technical Services Inc.	4	4	204
41	Jeromes Drilling Co.	3	9	6,465
42	Mbmg	3	3	30
43	Thomas, Dean, And Hoskins, Inc.	2	2	74
44	Minden Water Wells Inc.	1	2	314
45	MT Poverty Water Well Drilling	1	2	408
46	A-10 Drilling	1	1	2,364
47	Potts Drilling Inc.	1	1	3,855
48	406 Water Wells, LLC	1	1	253
49	Water & Environmental Technologies	1	1	113
50	Liberty Drilling & Pump Co.	—	1,569	2,646
51	Weber	—	936	954
52	Western Water Works Inc.	—	820	1,205
53	Mcclarty Drilling	—	722	777
54	Stinger Well Drilling	—	540	774
55	Water Well Services Inc.	—	291	323
56	Olsen & Justin	—	259	271
57	Montana	—	165	176
58	Wes	—	156	172
59	O.k.	—	155	324
60	Well Done Drilling & Pump Co.	—	132	152
61	Hudson	—	118	342
62	Briggs Drilling	—	108	381
63	Porter Drilling	—	100	126
64	Damm Drilling	—	82	107
65	Bearcat Drilling	—	81	96
66	Hendrickson	—	80	82
67	Castlio Drilling	—	66	645
68	Deyoung	—	66	67
69	Rainbow Well Drilling	—	64	204
70	Taylor	—	57	88
71	Mcclarty Well Drilling	—	56	59
72	Main Harbor Pumps & Well Drilling	—	52	352
73	Lowe-Bush Drilling	—	46	52
74	Luce	—	44	45
75	Weber Drilling	—	39	44
76	Pickett	—	36	347
77	Wes Drilling	—	34	39
78	Big Rock	—	34	38
79	Western	—	33	202
80	Sommer	—	30	131
81	Lochner	—	30	76
82	Wilhelm Hudson	—	28	73
83	Rimrock	—	28	33
84	Jesse Cannon	—	28	28
85	MT Bureau OF Mines & Geology	—	27	620
86	Shultz	—	25	29
87	Joe Liss Drilling	—	24	313
88	Schoepf Drilling- IN	—	24	40
89	Porter Well Drilling	—	23	47
90	Kornec	—	22	135
91	Osborne	—	14	59
92	Lochner Drilling	—	14	36
93	Hydrometrics Inc.	—	13	194
94	Usgs	—	12	102
95	Davis Drilling	—	10	385
96	Hansen Environmental Drilling	—	8	1,197
97	Hand	—	8	63
98	Maxim Technologies	—	7	491
99	Gold Brick	—	7	380
100	H & H Drilling	—	6	1,084
101	Valley Drilling Co.	—	6	1,108
102	Chen-Northern, Inc.	—	6	205
103	Lloyd	—	6	130
104	Four Star Drilling	—	6	87
105	Layne-Minnesota	—	6	39
106	A & M	—	6	30
107	Eslinger Drilling & Pump Service	—	5	4,594
108	Callison Well Drilling	—	5	699
109	Martin Well Drilling	—	5	1,451
110	Tetra Tech	—	5	137
111	Atlatl Inc.	—	5	86
112	Nelson	—	5	53
113	Ravalli Drilling Inc.	—	4	4,913
114	B And B Drilling	—	4	435
115	Starz	—	4	71
116	Ruen	—	4	57
117	Hudson Brothers	—	4	51
118	Gary Mayes Drilling Inc.	—	3	389
119	Environmental West	—	3	143
120	Thatcher Drilling Co.	—	3	362
121	Wilhelm	—	3	119
122	Schmidt	—	3	114
123	Northern Pacific Railway	—	3	63
124	Graham Drilling Inc.	—	2	3,141
125	Camp Well Drilling	—	2	3,803
126	Anderson Drilling	—	2	1,057
127	Poverty Drilling	—	2	992
128	Brazill Drilling	—	2	674
129	Brown	—	2	247
130	Lake	—	2	153
131	Grizzly Drilling	—	2	81
132	Beebe	—	2	68
133	RL Vetter Contracting	—	2	38
134	Olympus	—	2	34
135	Red Tiger Drilling	—	1	3,161
136	Corveau Drilling	—	1	142
137	Kane Well Drilling & Pump Service	—	1	1,551
138	Jerome And Okeefe Drilling Co.	—	1	1,032
139	Billings Drilling	—	1	896
140	Williams Well Drilling	—	1	785
141	Johnson	—	1	658
142	Ckc	—	1	482
143	Welch	—	1	457
144	Debuff Drilling	—	1	443
145	Preston	—	1	243
146	Aqua	—	1	189
147	Nicka Well Drilling	—	1	160
148	Aqua Source	—	1	117
149	Gold Brick Drilling	—	1	108
150	Universal	—	1	103
151	Bailey And Okeefe Drilling Co.	—	1	82
152	Bush Drilling	—	1	61
153	Lewis	—	1	39
154	Major Drilling Environmental	—	1	34

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

Billmayer Drilling has drilled the most Flathead County wells in the recent record — 524 since 2016, 2,535 in the county all-time.

How many well drilling companies work in Flathead County?

154 companies in the GWIC record have drilled wells in Flathead County; 58 of them have drilled somewhere in Montana since 2022. Smaller operators below the record threshold may also serve the area.

How deep is a typical well in Flathead County?

The median drilled depth in Flathead County is 192 ft, based on 22,069 recorded wells. Depths, water levels, and yields are on the Flathead County wells page.

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

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