⟁ California Well Data field records · 2026 survey

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Best well drillers in Stanislaus County, California

Not a pay-to-play list: these are the 134 drilling companies with wells on record in Stanislaus County, ranked by wells actually drilled here — 13,495 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.

134companies on record
52active since 2022
13,495wells in county record
#CompanyIn Stanislaus Co. since 2016All-time in countyStatewide
1 Masellis Drilling Inc. 778 2,774 6,081
2 Calwater Drilling Company Inc. 340 2,296 5,421
3 Hennings Bros Drilling Co. Inc. 119 2,433 6,823
4 Canepa And Sons Inc. 99 204 3,173
5 Castle Well Drilling Inc. 60 60 294
6 Castle Construction & Well Drilling Inc. 45 47 142
7 Living Water Well Drilling 28 28 441
8 Maggiora Bros Drilling Inc. 22 61 4,674
9 Quality Well Drillers Inc. 17 97 3,524
10 Corrpro Companies Inc. 14 14 737
11 Stonehouse Well Drilling 10 29 157
12 American Construction And Supply Inc. 8 34 1,685
13 Nor - Cal Pump & Well Drilling Inc. 8 9 248
14 M & M Well Drilling 7 33 74
15 Roadrunner Drilling & Pump Company Inc. 7 11 205
16 Roscoe Moss Company 7 7 130
17 Fox Loomis Incorporated 6 7 225
18 Allison Sierra 6 6 127
19 Farwest Corrosion Control Company 5 15 2,649
20 West Coast Exploration Inc. 5 10 30
21 Myers Brothers Well Drilling Inc. 4 35 2,865
22 R & M Water Well Drilling & Pumps Inc. 4 4 91
23 Eaton Drilling Co. LLC 3 32 3,793
24 Well Industries Inc. 3 4 558
25 Prieto Anthony J Water Well Drilling Inc. 3 3 637
26 Gregory Drilling Incorporated 3 3 143
27 Points West Drilling 3 3 78
28 Martin Pump & Supply Inc. 2 1,812 2,524
29 Purviance Drillers Inc. 2 32 663
30 Zim Industries Inc. Dba Bakersfield Well & Pump Co. 2 7 1,716
31 A B C Liovin Drilling Inc. 2 2 1,281
32 Beymer Well Service 2 2 2,921
33 Gregg Drilling & Testing Inc. 1 19 4,828
34 Johnson Drilling Co. 1 11 11,865
35 A & A Gross Drilling 1 8 816
36 Dos Palos Well Drilling 1 7 788
37 Scott Belknap Well Drilling Inc. 1 1 1,131
38 Arsenal Well Drilling Inc. 1 1 234
39 H & B Drilling And Sons LLC 1 1 414
40 Altamont Water Well And Pump 1 1 90
41 Baldwin & Son Well Drillers 1 1 319
42 Modern Technology Resources Inc. 1 1 44
43 Atwater Well Drilling 1 1 40
44 Cen Cal Drilling Inc. 1 1 31
45 Blake Hennings — 895 1,362
46 Osterberg And Stewart — 424 636
47 Osterberg And Carroll — 337 561
48 Simpson Drilling Company — 236 644
49 Weimer Stan Enterprises Inc. — 226 377
50 Olson's Plbg & Heating — 163 308
51 Panero Well Drilling Inc. — 122 921
52 Signal Drilling Company — 118 8,301
53 Modesto Well Drillers — 89 124
54 Pearson Well Drilling — 78 176
55 Tanko Bros Inc. — 49 2,617
56 Cascade Drilling L P — 49 2,827
57 W D C Exploration & Wells — 41 2,421
58 Valley Home Drilling Co. — 40 67
59 Arthur & Orum Well Drilling Inc. — 27 3,219
60 Layne Christensen Company — 26 2,362
61 Everett A Loewenstein — 26 357
62 Myers Brothers Inc. — 24 796
63 Howk Well & Equipment Co. — 24 48
64 John L Panero JR — 20 188
65 B R Purviance — 19 86
66 Layne-Western Co. Inc. — 18 255
67 Woodward Drilling Company Inc. — 16 1,542
68 Cullum Systems Incorporated — 16 277
69 Hydro Resources - West Inc. — 15 97
70 Testamerica Drilling Corp — 13 378
71 Scott Xxx PC Exploration Inc. — 13 154
72 Cascade Drilling Inc. - California — 11 3,167
73 Valley Water Well Drilling And Pump Co. — 11 59
74 John Panero And Carl Mcleister — 11 41
75 Mel Meyer — 10 101,127
76 Yosemite Falls Inc. — 8 706
77 Western Well Drilling Co. Ltd — 7 842
78 Myers And Summers — 7 75
79 Well Tech — 7 32
80 Starr Drilling And Pump Co. — 6 875
81 Resonantsonic International Inc. — 6 397
82 Ace Drilling & Pump Co. — 6 27
83 Island Drilling — 5 221
84 Arthur's Well Drilling — 5 41
85 Guardino Well Drilling Inc. — 4 1,736
86 Bootjack Drilling Inc. — 4 649
87 All Well Abandonment — 4 607
88 V & W Drilling — 4 310
89 Big Valley Drilling — 4 294
90 Pacific Gas And Electric Company — 4 264
91 ED Fields Water Well Drilling — 4 234
92 Carrell & Canepa Drilling — 4 79
93 U S Geological Survey — 4 30
94 Krazan & Associates — 3 30
95 Stroming Machinery — 3 2,391
96 C & N Pump & Well Co. — 3 697
97 S A Andresen All Terrain Exploration — 3 468
98 Winter Abajian Well Drilling — 3 203
99 C E Cates Well Drilling — 3 108
100 Tanko Well Drilling — 2 3,311
101 Anthony J Prieto — 2 2,330
102 National E W P Inc. — 2 431
103 Kleinfelder Inc. — 2 54
104 Myers Reverse, Inc. — 2 2,389
105 West Hazmat Drilling Corp — 2 1,702
106 Cruse Drilling Co. — 2 341
107 Anderson Pump Company — 2 299
108 Clark Well Inc. — 2 273
109 Thomas F Madsen — 2 128
110 Groundwater Technology — 2 46
111 All American Water Supply OF California Inc. — 2 40
112 Tcb Well Drilling — 2 32
113 DP Drilling — 2 30
114 Nor-Cal Pump & Well Service — 2 26
115 Martell Water Systems Inc. — 1 1,094
116 Kvilhaug Drilling & Pump Inc. — 1 327
117 D & D Drilling Inc. Dba Valley Drilling Co. — 1 1,282
118 Exploration Geoservices Inc. — 1 956
119 Bannon Walt Drilling Co. Inc. — 1 978
120 Mariposa Well Drilling Company Inc. — 1 1,146
121 Wayne Drilling Co. — 1 1,113
122 Levnard T Larson — 1 681
123 Rauch Drilling Company Inc. — 1 520
124 Valley Pump & Drilling Co. — 1 475
125 Aquarius Drilling And Pump Co. — 1 288
126 Pioneer Pump And Well Co. — 1 195
127 Taylor & Taber Drillers — 1 139
128 Jack Carrell Drilling Inc. — 1 123
129 Xxx — 1 113
130 Jeffrey L Gross — 1 103
131 Dan's Water Well & Pump Service Inc. — 1 37
132 B & F Drilling — 1 35
133 Big Valley Drilling & Exploration Co. — 1 32
134 Waterwell Plus — 1 27

Ranked by wells drilled in Stanislaus 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 Stanislaus County?

Masellis Drilling Inc. has drilled the most Stanislaus County wells in the recent record — 778 since 2016, 2,774 in the county all-time.

How many well drilling companies work in Stanislaus County?

134 companies in the DWR record have drilled wells in Stanislaus County; 52 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 Stanislaus County?

The median drilled depth in Stanislaus County is 200 ft, based on 16,656 recorded wells. Depths, water levels, and yields are on the Stanislaus County wells page.

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

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