San Marcos, California Water Well Drillers and Service Providers
Discover expert water well drillers, groundwater, and drought information in san marcos, California. For new installations, repairs, or regular maintenance, connect with trusted professionals.
Interactive Water Well Map – Estimate your new well's depth
Visit the San Marcos Water Well Map to view the water, irrigation, and geothermal wells.
Water Well Professionals in San Marcos, California – Water Well Drilling, Service, and Treatment
Johnson Pump Service
740 Opper St
Aim Pump Service
4279 Bonita Dr
Scott's Drilling Services
271 Roymar Rd
Fain Drilling & Pump Company Inc.
12029 Old Castle Rd
Aspin Well Drilling
1315 Walnut St
PumpMan Water Well SD - Ransom Pump
533 B St
Ramona Pump & Supply
27312 Sawday Truck Trl
Water Wise Well Service
1444 Main St
Booth's Pump Services
649 A St
Hydro-Tech Well Services
1672 Main St
Perry Plumbing & Pipelining
100 W 35th St
Pacific Drilling
5220 Anna Ave
CUTTING EDGE RESTORATION, INC of SAN DIEGO
2222 Verus St
Southern California Well Service
11998 Stoney Peak Dr
Tri County Drilling Inc
9631 Candida St
Go Plumbing and More
790 Kostner Dr
A Pro Plumbing
3268 Carnell Ave
Medina's Plumbing & Drain
4702 Carbine Way
Specialized Drilling Corp.
8534 Siempre Viva Rd
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Water Well Terminology
Mud Rotary Drilling –A drilling method that uses drilling mud to lubricate the bit and remove cuttings.
Learn about more terms in the glossary.
San Marcos Statistics
| Geology | |
|---|---|
| Aquifier | Other rocks |
| Rock Formation | Unknown |
| Well Information* | |
|---|---|
| Well Depth | 204 (ft) |
| SWL | 53 (ft) |
| Bedrock Depth | -- (ft) |
| Yield | 149 (gpm) |
| * Average within 5km | |
| Drought Monitor | |
|---|---|
| August 18, 2026 | D0 |
| August 11, 2026 | D0 |
| August 4, 2026 | D0 |
| July 28, 2026 | D0 |
| July 21, 2026 | D0 |
| July 14, 2026 | D0 |
| July 7, 2026 | D0 |
| June 30, 2026 | D0 |
Source: US Drought MonitorAdd to Website | |
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