Best well drillers in Mason County, Washington

Not a pay-to-play list: these are the 158 drilling companies with wells on record in Mason County, ranked by wells actually drilled here — 6,626 logged wells in Washington State Department of Ecology well construction reports (records as of 2026-10-02). Every number links back to the public record.

158companies on record

42active since 2022

6,626wells in county record

#	Company	In Mason Co. since 2016	All-time in county	Statewide
1	Joshua Koepp	361	520	1,327
2	Rogeray Phythian	239	1,111	2,940
3	Emily Davis	136	138	236
4	Dwane Knapp	96	496	615
5	Christopher Jones	67	73	3,767
6	Robert Laymon	59	72	967
7	Cory Johnson	54	54	112
8	Clayton Pitts	53	161	437
9	Michael Davis	42	501	627
10	James Johnson	36	36	68
11	Mark Wiese	25	26	1,776
12	Daniel Carpenter	21	40	550
13	Nicolas Sample	18	50	543
14	Madaline Trotter	18	18	54
15	Michael Cyrier	10	14	1,083
16	Joshua Stone	10	10	124
17	Eric Brasher	7	7	155
18	Lyle Pitts	6	146	543
19	Jack Grande	6	138	183
20	Donald Johnston	6	6	67
21	Daniel King	5	6	780
22	Jacob Hansen	5	5	146
23	Darrell Feavel	3	3	226
24	Marvin Fengel	2	10	153
25	Matthew Henningsen	1	119	148
26	Stanley Davis	1	80	104
27	Terry Gavin	1	28	1,554
28	Albert Smith	1	4	467
29	Randy Harris	1	3	279
30	Billy Dodge	1	2	96
31	John Brazeau	1	1	198
32	Matthew Call	1	1	250
33	Raymond Bauer	1	1	436
34	Brett Phythian	1	1	3,487
35	Jack Wilson	1	1	137
36	Christopher Mcghee	1	1	1,529
37	Trent Burrell	1	1	28
38	Gray Rich	1	1	262
39	Jon Knapp	—	226	432
40	ED Nelson	—	226	426
41	David Deremer	—	224	643
42	Nicholas Ernst	—	201	435
43	Mark Nelson	—	189	316
44	William Lee	—	181	196
45	Ronnie King	—	166	213
46	William Russell	—	131	242
47	James Wiley	—	104	1,084
48	Michael Mitchell	—	101	119
49	Brandon Hicks	—	88	337
50	William Neal II	—	73	107
51	Lanny Carpenter	—	69	714
52	Ronald Wiley	—	60	585
53	John Sullivan	—	34	274
54	Rylan Broughton	—	34	38
55	Brigham Ward	—	33	301
56	Jeremy Palin	—	30	114
57	Craig Gresham	—	28	1,895
58	Tim Maxey	—	26	1,256
59	William Maberry SR	—	22	280
60	Larry Olsen	—	21	422
61	Corbie Chance II	—	20	38
62	Roger Harrison	—	19	325
63	Glen Hicks	—	19	193
64	Corbie Chance	—	18	103
65	Mark Hambleton	—	18	29
66	William Neal Iii	—	17	50
67	Wesley Glessner	—	15	347
68	Randy Smith	—	15	274
69	Edwin Brown	—	15	62
70	Shawn Beebe	—	15	48
71	Edwin King	—	14	670
72	Nicholas Stoican	—	12	140
73	Chris Town	—	10	318
74	John Hall	—	10	292
75	Shane Averette	—	9	452
76	Ervin Wasser	—	9	93
77	Geoff Kelstrup	—	9	44
78	Rick Swanson	—	8	434
79	Donald Duckworth	—	8	430
80	Matt Olsen	—	8	188
81	James Trepanier	—	8	145
82	Earl Hilliker	—	7	560
83	Self Self	—	7	216
84	Willie Williams	—	6	985
85	Ronald Stanfill	—	6	126
86	James Miller	—	6	63
87	Robert Stanfill	—	6	49
88	John Arfman	—	5	725
89	Ronald Jones	—	5	368
90	Siegfried Mehr	—	5	190
91	NA Unknown	—	5	140
92	Pete Smith	—	5	109
93	Scott Woolley	—	5	78
94	Jeff Gavin	—	5	65
95	Ephraim Mckinney	—	5	44
96	Todd Mickelsen	—	5	41
97	Ralph Riggles	—	4	1,995
98	Charles Smith	—	4	341
99	Thomas Needham	—	4	256
100	Chester King	—	4	228
101	Jack Mcdonald	—	4	34
102	Ronald Bornmann	—	3	767
103	George Burt	—	3	471
104	Lynn Bartholomew	—	3	439
105	Kelly Edwards	—	3	226
106	Kenneth Blackman	—	3	147
107	Larry Gustin	—	3	119
108	Keith Kincy	—	3	106
109	John Armstrong	—	3	49
110	Kevin Beavers	—	3	30
111	Forrest Chance	—	3	29
112	Wade Iversen	—	2	171
113	Dave Charon	—	2	92
114	Mitch Mathews	—	2	1,418
115	Theodore Rieckers	—	2	828
116	Neil Richardson	—	2	564
117	Gary Bartholomew	—	2	540
118	Boyd Dart	—	2	386
119	Dean Hayes SR	—	2	321
120	Paul Stoican	—	2	282
121	Ronald Duckworth	—	2	190
122	Edwin Rath	—	2	109
123	William Dover	—	2	86
124	Roger Indrebo	—	2	74
125	Raymond Hahn	—	2	72
126	David Scoggins	—	2	66
127	Roy Miller	—	2	56
128	Robert Carper	—	2	53
129	Dale Smith	—	2	35
130	David Rutledge	—	1	1,193
131	Richard Debler	—	1	539
132	Donald Lofall	—	1	395
133	Eric Hansen	—	1	566
134	Reazo Redinger Iii	—	1	1,131
135	Bradley Johnson	—	1	2,789
136	Jerry Rank	—	1	1,286
137	Richard Deremer II	—	1	1,149
138	Roger Oelke	—	1	796
139	Lawrence Johnson	—	1	749
140	Daniel Rayton	—	1	683
141	George Clovis	—	1	335
142	ED Moerke	—	1	320
143	Thomas Craney	—	1	296
144	Jon Mathews	—	1	261
145	Curtis King	—	1	208
146	Randall Holt	—	1	189
147	Tim Uhlenkott	—	1	171
148	James Vignalli	—	1	157
149	Charles Lantau	—	1	150
150	Gerald Bluhm	—	1	138
151	Bill James	—	1	92
152	Wallace Robinson	—	1	81
153	Robert Lundin	—	1	79
154	James Stair	—	1	57
155	Bruce Lewis	—	1	54
156	Rick Wanzer	—	1	51
157	Ronald Weist	—	1	50
158	Ronald Dean	—	1	34

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

Joshua Koepp has drilled the most Mason County wells in the recent record — 361 since 2016, 520 in the county all-time.

How many well drilling companies work in Mason County?

158 companies in the Ecology record have drilled wells in Mason County; 42 of them have drilled somewhere in Washington since 2022. Smaller operators below the record threshold may also serve the area.

How deep is a typical well in Mason County?

The median drilled depth in Mason County is 117 ft, based on 9,518 recorded wells. Depths, water levels, and yields are on the Mason County wells page.

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

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