Best well drillers in Alameda County, California

Not a pay-to-play list: these are the 174 drilling companies with wells on record in Alameda County, ranked by wells actually drilled here — 7,111 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.

174companies on record

65active since 2022

7,111wells in county record

#	Company	In Alameda Co. since 2016	All-time in county	Statewide
1	Gregg Drilling LLC	129	129	558
2	American Construction And Supply Inc.	119	159	1,685
3	T S A Drilling Inc. Dba Penecore Drilling	81	99	577
4	Gregg Drilling & Testing Inc.	70	573	4,828
5	Cascade Drilling L P	55	110	2,827
6	Cascade Drilling LP	52	79	826
7	Altamont Water Well And Pump	46	47	90
8	Pitcher Drilling Co.	33	326	1,232
9	Pacific Coast Well & Pump Inc.	31	48	182
10	Geocentric Drilling Inc.	27	27	81
11	Woodward Drilling Company Inc.	26	214	1,542
12	Corrpro Companies Inc.	25	25	737
13	Martell Water Systems Inc.	22	347	1,094
14	Environmental Control Associates	22	32	277
15	Pitcher Services LLC	21	21	114
16	Signal Drilling Company	19	781	8,301
17	Exploration Geoservices Inc.	17	61	956
18	V T S Drilling LLC	17	51	92
19	Condon-Johnson & Associates Inc.	14	14	25
20	Maggiora Bros Drilling Inc.	12	148	4,674
21	J & H Drilling Co. Inc.	12	12	978
22	Jeffrey David Harra	9	72	109
23	Canepa And Sons Inc.	8	51	3,173
24	Guardino Well Drilling Inc.	8	17	1,736
25	Gregory Drilling Incorporated	8	8	143
26	Pacific Coast Drilling	7	38	262
27	Castle Well Drilling Inc.	6	6	294
28	Trinity Drilling Inc.	6	6	36
29	Cardno Inc.	5	5	28
30	Nor - Cal Pump & Well Drilling Inc.	4	5	248
31	Dan's Water Well & Pump Service Inc.	3	15	37
32	Weeks Drilling And Pump Co.	2	97	14,789
33	Fox Loomis Incorporated	2	39	225
34	Yosemite Falls Inc.	2	10	706
35	Bertram Drilling Inc.	2	10	1,171
36	Farwest Corrosion Control Company	2	3	2,649
37	Masellis Drilling Inc.	2	2	6,081
38	South Valley Pump & Drilling	2	2	69
39	Confluence Environmental Inc.	2	2	65
40	Malcolm Drilling Company Inc.	2	2	63
41	Vironex Technical Services LLC	2	2	28
42	R. S. DE Lucohi/ Delucchi Well & Pump	1	143	149
43	Hennings Bros Drilling Co. Inc.	1	83	6,823
44	A A A Drilling Service	1	82	99
45	Clear Heart Drilling Inc.	1	54	694
46	Calwater Drilling Company Inc.	1	43	5,421
47	Zim Industries Inc. Dba Bakersfield Well & Pump Co.	1	4	1,716
48	DE LA Grange & Sons Inc.	1	4	263
49	Eaton Drilling Co. LLC	1	3	3,793
50	Britton Exploration	1	1	36
51	Mel Meyer	—	459	101,127
52	Acme Drilling Company	—	213	1,439
53	Vironex, Inc.	—	208	649
54	Johnson Drilling Co.	—	145	11,865
55	DE Lucchi Well & Pump, Inc.	—	135	157
56	Western Well Drilling Co. Ltd	—	124	842
57	W D C Exploration & Wells	—	100	2,421
58	Trc Solutions Inc.	—	100	137
59	West Hazmat Drilling Corp	—	93	1,702
60	Resonantsonic International Inc.	—	85	397
61	C & N Pump & Well Co.	—	82	697
62	Cascade Drilling Inc. - California	—	71	3,167
63	Dejesus Pump & Well Drilling Inc.	—	61	1,157
64	Moss Roscoe Company	—	55	1,220
65	Silva Bros	—	53	53
66	William L Myers	—	52	66
67	Leite Pump Sales	—	52	52
68	All Well Abandonment	—	50	607
69	Precision Sampling Inc.	—	46	234
70	Glenn Martell & Son Inc.	—	46	164
71	Scott Xxx PC Exploration Inc.	—	40	154
72	Cornerstone Pump & Well Inc.	—	37	90
73	V F Bassett	—	36	101
74	Louis A Wood Co.	—	36	38
75	Kvilhaug Drilling & Pump Inc.	—	31	327
76	Lovejoy Sherwood JR	—	31	38
77	Bayland Drillers	—	28	317
78	V & W Drilling	—	28	310
79	Ase Drilling Inc.	—	27	82
80	Danville Well Drilling Co.	—	26	27
81	H A M Drilling Inc.	—	24	273
82	Corrosion Technology Inc.	—	20	169
83	Water-Tech Well Drilling	—	19	665
84	Motheral Well Drilling	—	19	198
85	Aqua Science Engineers Inc.	—	17	131
86	Westervelt Well Drilling	—	14	122
87	Blake Hennings	—	14	1,362
88	Myers Brothers Well Drilling Inc.	—	12	2,865
89	National E W P Inc.	—	12	431
90	Dodson Contracting Co.	—	12	113
91	Viking Drillers Inc.	—	12	83
92	Tom Hunt Drilling Co.	—	11	418
93	Layne Christensen Company	—	10	2,362
94	Humboldt Drilling & Pump Co.	—	10	131
95	Environmental Investigation Services, Inc.	—	10	100
96	Island Drilling	—	9	221
97	Bradley & Sons Inc.	—	8	3,627
98	Trinity Source Group Inc.	—	8	67
99	Bsk Associates	—	8	37
100	Wilkinson Enterprises Inc.	—	7	445
101	S A Andresen All Terrain Exploration	—	7	468
102	Robert Garcia Well & Pump Co.	—	7	192
103	Castle Construction & Well Drilling Inc.	—	7	142
104	Nero Ostenberg	—	7	55
105	Cache Creek Drilling	—	6	247
106	Guardino Pump & Well	—	6	482
107	Spectrum Exploration Inc.	—	6	307
108	S I Guardino	—	6	43
109	Taber Consultants	—	6	30
110	Boart Longyear Company	—	5	172
111	Yosemite Falls Well Drilling	—	5	464
112	Mitchell Drilling Environmental Corp	—	5	199
113	Xxx Soils Exploration SV	—	5	48
114	Geoloop Drilling/Tom Moreland	—	5	32
115	Chappell Pump & Supply Inc.	—	4	927
116	Rottman Drilling Co.	—	4	1,331
117	Beylik Drilling & Pump Service	—	4	1,267
118	American Drilling	—	4	970
119	Testamerica Drilling Corp	—	4	378
120	Roadrunner Drilling & Pump Company Inc.	—	3	205
121	Grade Drilling Co.	—	3	43
122	A & A Gross Drilling	—	3	816
123	Williams Well Drilling	—	3	376
124	Heer Nar S	—	3	245
125	Dejesus Ernest Pump And Well Drilling Service	—	3	178
126	Groundwater Technology	—	3	46
127	B & F Drilling	—	3	35
128	S D Drilling Inc.	—	3	31
129	A B C Liovin Drilling Inc.	—	2	1,281
130	Nutting And Jensen Drilling	—	2	1,410
131	Salinas Pump Company	—	2	712
132	Pacific Gas And Electric Company	—	2	264
133	Hudson R Barrow	—	2	262
134	Roman Well Drilling	—	2	242
135	Redfeairn R L Drilling	—	2	195
136	Roscoe Moss Company	—	2	130
137	Allen, Ken II Drilling	—	2	125
138	Coastal Well Cleaning	—	2	118
139	Montalvo Well & Pump Co.	—	2	113
140	Canada Pump Sales & Service Inc.	—	2	73
141	Joe Souza	—	2	72
142	Dexter Machinery	—	2	53
143	Pollock's Drilling & Pump Service	—	2	39
144	W T Page	—	2	31
145	Bosearello Enterprises	—	2	30
146	Fisch Brothers Drilling, Inc.	—	1	6,393
147	American Well Drilling And Pump Service	—	1	439
148	Landino Drilling Co.	—	1	151
149	Seebeck M E	—	1	567
150	Martin Pump & Supply Inc.	—	1	2,524
151	Bill Belknap	—	1	2,758
152	Bfr Associates	—	1	5,621
153	Anderson K Drilling, Inc.	—	1	1,136
154	Woods Well Drilling	—	1	755
155	Doshier And Gregson Drilling Inc.	—	1	489
156	Valley Pump & Drilling Co.	—	1	475
157	Layne-Western Co. Inc.	—	1	255
158	Datum Exploration Inc.	—	1	223
159	Pioneer Pump And Well Co.	—	1	195
160	Paul Williams And Sons	—	1	175
161	James P Treadway	—	1	87
162	Clark & Sons	—	1	76
163	Enprobe Environental Direct Push & Drilling Services	—	1	76
164	M S Seebeck & Son	—	1	75
165	Mcrae K M Inc.	—	1	51
166	Ben Barrow Company	—	1	49
167	Howk Well & Equipment Co.	—	1	48
168	J Lippi & Son	—	1	47
169	Rea Construction	—	1	46
170	Machado Inc.	—	1	40
171	R E S N A	—	1	37
172	Mcgann	—	1	34
173	Murphy Pump & Supply	—	1	31
174	U S Geological Survey	—	1	30

Ranked by wells drilled in Alameda 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 Alameda County?

Gregg Drilling LLC has drilled the most Alameda County wells in the recent record — 129 since 2016, 129 in the county all-time.

How many well drilling companies work in Alameda County?

174 companies in the DWR record have drilled wells in Alameda County; 65 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 Alameda County?

The median drilled depth in Alameda County is 74 ft, based on 13,241 recorded wells. Depths, water levels, and yields are on the Alameda County wells page.

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

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