Best well drillers in Flathead County, Montana

Not a pay-to-play list: these are the 153 drilling companies with wells on record in Flathead County, ranked by wells actually drilled here — 19,712 logged wells in Montana Bureau of Mines and Geology Ground Water Information Center (GWIC) (records as of 2026-10-02). Every number links back to the public record.

153companies on record

57active since 2022

19,712wells in county record

#	Company	In Flathead Co. since 2016	All-time in county	Statewide
1	Billmayer Drilling	524	2,535	3,232
2	Davis Brothers Drilling	421	423	1,007
3	OH Well Drilling And Pump	416	461	899
4	Glazier Drilling	403	1,418	1,744
5	Chambers Drilling Company	388	2,023	2,244
6	Coldwater Drilling And Pumps	383	383	597
7	Allwest Drilling Inc.	329	693	1,694
8	RM Drilling And Well Services	324	324	386
9	Okeefe Drilling Co.	199	274	8,889
10	Erickson Drilling & Pump Co.	88	704	803
11	Aquasource Drilling LLC	86	88	1,103
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	1,815
26	AK Drilling Inc.	14	17	1,310
27	Beyer Drilling	13	18	44
28	Haz Tech Drilling Inc.	12	15	2,139
29	West Central Environmental Consultants	10	12	311
30	Environmental West Exploration	9	18	329
31	Luce Drilling	8	30	66
32	SK Geotechnical Co.	8	12	434
33	Universal Drilling	7	10	1,147
34	MT Dept OF Transportation	5	153	5,869
35	Western Water Wells	5	5	1,188
36	Jacobson Drilling	5	5	608
37	Stinger Drilling	4	88	127
38	North Star Drilling Inc.	4	4	232
39	Pioneer Technical Services Inc.	4	4	204
40	Jeromes Drilling Co.	3	9	6,465
41	Mbmg	3	3	30
42	Thomas, Dean, And Hoskins, Inc.	2	2	74
43	Minden Water Wells Inc.	1	2	314
44	MT Poverty Water Well Drilling	1	2	408
45	A-10 Drilling	1	1	2,353
46	Potts Drilling Inc.	1	1	3,854
47	406 Water Wells, LLC	1	1	232
48	Water & Environmental Technologies	1	1	113
49	Liberty Drilling & Pump Co.	—	1,569	2,646
50	Weber	—	936	954
51	Western Water Works Inc.	—	820	1,205
52	Mcclarty Drilling	—	722	777
53	Stinger Well Drilling	—	540	774
54	Water Well Services Inc.	—	291	323
55	Olsen & Justin	—	259	271
56	Montana	—	165	176
57	Wes	—	156	172
58	O.k.	—	155	324
59	Well Done Drilling & Pump Co.	—	132	152
60	Hudson	—	118	342
61	Briggs Drilling	—	108	381
62	Porter Drilling	—	100	126
63	Damm Drilling	—	82	107
64	Bearcat Drilling	—	81	96
65	Hendrickson	—	80	82
66	Castlio Drilling	—	66	645
67	Deyoung	—	66	67
68	Rainbow Well Drilling	—	64	204
69	Taylor	—	57	88
70	Mcclarty Well Drilling	—	56	59
71	Main Harbor Pumps & Well Drilling	—	52	352
72	Lowe-Bush Drilling	—	46	52
73	Luce	—	44	45
74	Weber Drilling	—	39	44
75	Pickett	—	36	347
76	Wes Drilling	—	34	39
77	Big Rock	—	34	38
78	Western	—	33	202
79	Sommer	—	30	131
80	Lochner	—	30	76
81	Wilhelm Hudson	—	28	73
82	Rimrock	—	28	33
83	Jesse Cannon	—	28	28
84	MT Bureau OF Mines & Geology	—	27	620
85	Shultz	—	25	29
86	Joe Liss Drilling	—	24	313
87	Schoepf Drilling- IN	—	24	40
88	Porter Well Drilling	—	23	47
89	Kornec	—	22	135
90	Osborne	—	14	59
91	Lochner Drilling	—	14	36
92	Hydrometrics Inc.	—	13	194
93	Usgs	—	12	102
94	Davis Drilling	—	10	385
95	Hansen Environmental Drilling	—	8	1,197
96	Hand	—	8	63
97	Maxim Technologies	—	7	491
98	Gold Brick	—	7	380
99	H & H Drilling	—	6	1,084
100	Valley Drilling Co.	—	6	1,108
101	Chen-Northern, Inc.	—	6	205
102	Lloyd	—	6	130
103	Four Star Drilling	—	6	87
104	Layne-Minnesota	—	6	39
105	A & M	—	6	30
106	Eslinger Drilling & Pump Service	—	5	4,586
107	Callison Well Drilling	—	5	698
108	Martin Well Drilling	—	5	1,451
109	Tetra Tech	—	5	137
110	Atlatl Inc.	—	5	86
111	Nelson	—	5	53
112	Ravalli Drilling Inc.	—	4	4,911
113	B And B Drilling	—	4	435
114	Starz	—	4	71
115	Ruen	—	4	57
116	Hudson Brothers	—	4	51
117	Gary Mayes Drilling Inc.	—	3	389
118	Environmental West	—	3	143
119	Thatcher Drilling Co.	—	3	362
120	Wilhelm	—	3	119
121	Schmidt	—	3	114
122	Northern Pacific Railway	—	3	63
123	Graham Drilling Inc.	—	2	3,141
124	Camp Well Drilling	—	2	3,803
125	Anderson Drilling	—	2	1,057
126	Poverty Drilling	—	2	992
127	Brazill Drilling	—	2	674
128	Brown	—	2	247
129	Lake	—	2	153
130	Grizzly Drilling	—	2	81
131	Beebe	—	2	68
132	RL Vetter Contracting	—	2	38
133	Olympus	—	2	34
134	Red Tiger Drilling	—	1	3,157
135	Corveau Drilling	—	1	141
136	Kane Well Drilling & Pump Service	—	1	1,551
137	Jerome And Okeefe Drilling Co.	—	1	1,032
138	Billings Drilling	—	1	895
139	Williams Well Drilling	—	1	785
140	Johnson	—	1	658
141	Ckc	—	1	482
142	Welch	—	1	457
143	Debuff Drilling	—	1	443
144	Preston	—	1	243
145	Aqua	—	1	189
146	Nicka Well Drilling	—	1	160
147	Aqua Source	—	1	117
148	Gold Brick Drilling	—	1	108
149	Universal	—	1	103
150	Bailey And Okeefe Drilling Co.	—	1	82
151	Bush Drilling	—	1	61
152	Lewis	—	1	39
153	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?

153 companies in the GWIC record have drilled wells in Flathead County; 57 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 22,037 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.

Get quotes from drillers active in Flathead County

Free. Goes to licensed drillers working Flathead County.

Drill in Flathead County?

If your company is on this list, your profile is free to claim — confirm your details and add your contact information so Flathead County property owners reach you directly.

Claim your profile

Free to claim · built from GWIC public well-log records.