Best well drillers in Santa Clara County, California

Not a pay-to-play list: these are the 210 drilling companies with wells on record in Santa Clara County, ranked by wells actually drilled here — 17,593 logged wells in the California Department of Water Resources (DWR) Well Completion Reports database (records as of 2026-08-14). Every number links back to the public record.

210companies on record

76active since 2022

17,593wells in county record

#	Company	In Santa Clara Co. since 2016	All-time in county	Statewide
1	Guardino Well Drilling Inc.	280	1,263	1,736
2	Good Earthkeeping Organization Inc.	157	157	157
3	Cascade Drilling L P	151	182	2,827
4	Maier & Dougherty Pump & Supply Inc.	142	209	241
5	Gregg Drilling & Testing Inc.	136	1,828	4,828
6	T S A Drilling Inc. Dba Penecore Drilling	129	172	577
7	Gregg Drilling LLC	115	115	558
8	Environmental Control Associates	114	159	277
9	Cascade Drilling LP	91	193	826
10	Maggiora Bros Drilling Inc.	83	1,467	4,674
11	Geocentric Drilling Inc.	44	44	81
12	American Construction And Supply Inc.	40	149	1,685
13	Woodward Drilling Company Inc.	38	230	1,542
14	Confluence Environmental Inc.	38	38	65
15	Exploration Geoservices Inc.	29	688	956
16	Corrpro Companies Inc.	28	28	737
17	Pitcher Services LLC	27	27	114
18	Earth Flow Drilling Company	20	164	2,192
19	Pitcher Drilling Co.	19	279	1,232
20	Fred Ash & Sons Lynch Pump Co.	16	20	118
21	Moss Roscoe Company	15	363	1,220
22	Signal Drilling Company	14	681	8,301
23	National E W P Inc.	13	56	431
24	Wilkinson Enterprises Inc.	11	55	445
25	Clear Heart Drilling Inc.	11	36	694
26	Roadrunner Drilling & Pump Company Inc.	11	27	205
27	Gregory Drilling Incorporated	11	11	143
28	Chappell Pump & Supply Inc.	8	656	927
29	Eaton Drilling Co. LLC	7	19	3,793
30	Pacific Gas And Electric Company	6	61	264
31	Drew & Hefner Well Drilling	6	6	43
32	Trinity Drilling Inc.	6	6	36
33	Landino Drilling Co.	6	6	151
34	Bertram Drilling Inc.	5	171	1,171
35	Bc2 Environmental LLC	4	13	416
36	Zim Industries Inc. Dba Bakersfield Well & Pump Co.	3	12	1,716
37	Taber Drilling	3	3	87
38	DE LA Grange & Sons Inc.	2	132	263
39	Britton Exploration	2	24	36
40	Martell Water Systems Inc.	2	8	1,094
41	Castle Construction & Well Drilling Inc.	2	5	142
42	Jeffrey David Harra	2	4	109
43	J & H Drilling Co. Inc.	2	2	978
44	Living Water Well Drilling	2	2	441
45	Yellow Jacket Drilling Services LLC	2	2	291
46	Stonehouse Well Drilling	2	2	157
47	Granite Drilling Company	1	11	476
48	Malcolm Drilling Company Inc.	1	7	63
49	Bradley & Sons Inc.	1	5	3,627
50	Yosemite Falls Inc.	1	5	706
51	Wildrose Drilling LLC	1	1	102
52	Fain Drilling & Pump Co. Inc.	1	1	3,029
53	Pacific Coast Well Drilling Inc.	1	1	337
54	Altamont Water Well And Pump	1	1	90
55	West Hazmat Drilling Corp	—	645	1,702
56	Mel Meyer	—	571	101,127
57	W D C Exploration & Wells	—	482	2,421
58	Guardino Pump & Well	—	432	482
59	C & N Pump & Well Co.	—	422	697
60	S A Andresen All Terrain Exploration	—	328	468
61	Vironex, Inc.	—	306	649
62	Western Well Drilling Co. Ltd	—	275	842
63	Hudson R Barrow	—	259	262
64	Bayland Drillers	—	257	317
65	D B Drilling Co.	—	174	973
66	Cascade Drilling Inc. - California	—	171	3,167
67	Duval's Well Drilling	—	165	167
68	West Coast Drilling	—	154	288
69	Turner Explorations Inc.	—	148	200
70	Spectrum Exploration Inc.	—	129	307
71	Weeks Drilling And Pump Co.	—	122	14,789
72	Pioneer Pump And Well Co.	—	117	195
73	Precision Sampling Inc.	—	103	234
74	Environmental Investigation Services, Inc.	—	88	100
75	Robert Garcia Well & Pump Co.	—	82	192
76	Island Drilling	—	80	221
77	Corrosion Technology Inc.	—	78	169
78	Roman Well Drilling	—	71	242
79	Johnson Drilling Co.	—	68	11,865
80	Joe Souza	—	65	72
81	All Well Abandonment	—	64	607
82	Resonantsonic International Inc.	—	64	397
83	V F Bassett	—	60	101
84	Viking Drillers Inc.	—	58	83
85	Delbert Wolfe	—	54	54
86	Fred Ash & Sons	—	51	1,217
87	Mcrae K M Inc.	—	50	51
88	Freedom General Repair & Pump Shop	—	48	690
89	Kvilhaug Drilling & Pump Inc.	—	47	327
90	Tom Hunt Drilling Co.	—	47	418
91	Drilling Services Inc.	—	46	63
92	Montalvo Well & Pump Co.	—	46	113
93	Nero Ostenberg	—	46	55
94	Moerlien's Plumbing & Electric Shop	—	46	47
95	V & W Drilling	—	45	310
96	J Lippi & Son	—	45	47
97	Welltest Inc.	—	42	52
98	Dexter Machinery	—	41	53
99	Kenneth Roman	—	36	320
100	John A Brandt	—	35	143
101	Case Pacific Company	—	35	55
102	Enprobe Environental Direct Push & Drilling Services	—	33	76
103	Tide Tool & Engr. Co.	—	32	128
104	William Porter Well Drilling	—	31	46
105	Layne Christensen Company	—	30	2,362
106	R E S N A	—	26	37
107	J P Pilkens Water Well Drlg	—	26	31
108	George Azevedo	—	26	27
109	Mitchell Drilling Environmental Corp	—	25	199
110	Sydney Geels IT Corporation	—	25	78
111	Robert Garcia Well Drilling & Pump Co.	—	25	46
112	Fred W Porter & Sons	—	24	105
113	Precision Drilling Co.	—	24	71
114	R Barrick For Great Sierra	—	24	55
115	Valley Well Drilling LP	—	20	410
116	Cullum Systems Incorporated	—	19	277
117	Trinity Source Group Inc.	—	19	67
118	S I Guardino	—	19	43
119	Bosearello Enterprises	—	19	30
120	Moore Twining Associates Inc.	—	18	46
121	Beylik Drilling & Pump Service	—	17	1,267
122	Trc Solutions Inc.	—	17	137
123	Groundwater Technology	—	17	46
124	Coastal Well Cleaning	—	16	118
125	S D Drilling Inc.	—	16	31
126	Teg - Northern California Inc.	—	16	27
127	Yosemite Falls Well Drilling	—	15	464
128	Ase Drilling Inc.	—	15	82
129	Hew Drilling Co.	—	15	38
130	Valley Pump & Drilling Co.	—	14	475
131	Aqua Science Engineers Inc.	—	14	131
132	California Well Drilling & Pump Co.	—	14	37
133	Kleinfelder Inc.	—	13	54
134	Rea Construction	—	13	46
135	Salinas Pump Company	—	12	712
136	Big Valley Drilling	—	12	294
137	Well Tech	—	12	32
138	Anderson K Drilling, Inc.	—	11	1,136
139	Dudley Newton JR	—	11	38
140	P/D Drilling Co.	—	11	25
141	Golden Empire Drilling	—	10	168
142	Myers Brothers Well Drilling Inc.	—	9	2,865
143	Cornerstone Pump & Well Inc.	—	9	90
144	Xxx Soils Exploration SV	—	9	48
145	Farwest Corrosion Control Company	—	8	2,649
146	J Field Drilling Co.	—	8	275
147	Humboldt Drilling & Pump Co.	—	8	131
148	A B C Liovin Drilling Inc.	—	7	1,281
149	Hunt Drilling Company Inc.	—	7	1,213
150	Shoup Burton C Well Drilling And Pumps	—	7	79
151	A & R Drilling	—	7	60
152	Digges & Son	—	6	421
153	Scott Xxx PC Exploration Inc.	—	6	154
154	Koenig Enterprises	—	6	83
155	Robert Haylock "RH" Well Drilling	—	6	48
156	B & F Drilling	—	6	35
157	Purviance Drillers Inc.	—	5	663
158	V T S Drilling LLC	—	5	92
159	Gopher Drilling	—	5	79
160	Capitola Pump & Supply Co.	—	5	129
161	Ben Barrow Company	—	5	49
162	Cullum Drilling & Pump Service	—	5	40
163	Pacific Coast Drilling	—	4	262
164	Grade Drilling Co.	—	4	43
165	Boart Longyear Company	—	4	172
166	Landino Construction And Well Drilling	—	4	703
167	Wayne Environmental Drilling Company Inc.	—	4	664
168	Lackey Bob Drilling	—	4	32
169	Heer Nar S	—	3	245
170	Bass Drilling	—	3	154
171	Roscoe Moss Company	—	3	130
172	Sprague Pump Co.	—	3	66
173	Modern Technology Resources Inc.	—	3	44
174	Baker Scott	—	3	33
175	Aaa Pump	—	3	28
176	Waterwell Plus	—	3	27
177	Canepa And Sons Inc.	—	2	3,173
178	Calwater Drilling Company Inc.	—	2	5,421
179	Bill Belknap	—	2	2,758
180	C F Dougherty	—	2	685
181	DE Lucchi Well & Pump, Inc.	—	2	157
182	R. S. DE Lucohi/ Delucchi Well & Pump	—	2	149
183	Xxx	—	2	113
184	Pacific Geoscience Inc.	—	2	84
185	Stang Hydronics Inc.	—	2	56
186	Westex	—	2	40
187	Cofferdam Unwatering Corporation	—	2	32
188	Quality Well Drillers Inc.	—	1	3,524
189	Walt Bannon Drilling Inc.	—	1	2,498
190	Cache Creek Drilling	—	1	247
191	Moosios Pump Co. Inc.	—	1	127
192	A A A Drilling Service	—	1	99
193	Bfr Associates	—	1	5,621
194	Acme Drilling Company	—	1	1,439
195	Ken Gross Pump Service	—	1	507
196	Dicken's Drilling	—	1	490
197	Testamerica Drilling Corp	—	1	378
198	Weimer Stan Enterprises Inc.	—	1	377
199	M P Burgess	—	1	313
200	Multi Water Systems	—	1	269
201	Digges & Son Water Well Drilling	—	1	250
202	Fred W Porter & Son	—	1	207
203	Well Drilling	—	1	100
204	Boggs Drilling	—	1	78
205	Interstate Soils Sampling Inc.	—	1	75
206	Capitola Pump Inc.	—	1	51
207	K & D Drilling	—	1	42
208	Lovejoy Sherwood JR	—	1	38
209	Murphy Pump & Supply	—	1	31
210	Taber Consultants	—	1	30

Ranked by wells drilled in Santa Clara County since 2016 (then all-time), from the full DWR 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 Santa Clara County?

Guardino Well Drilling Inc. has drilled the most Santa Clara County wells in the recent record — 280 since 2016, 1,263 in the county all-time.

How many well drilling companies work in Santa Clara County?

210 companies in the DWR record have drilled wells in Santa Clara County; 76 of them have drilled somewhere in California since 2022. Smaller operators below the record threshold may also serve the area.

How deep is a typical well in Santa Clara County?

The median drilled depth in Santa Clara County is 80 ft, based on 33,176 recorded wells. Depths, water levels, and yields are on the Santa Clara County wells page.

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

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