Well Drilling in Kern County, California: What to Expect
A guide to well drilling in Kern County—local geology, typical depths, permit process, and how to find licensed C-57 drillers in the area.
Key Takeaways
- Valley floor 200–600+ ft; eastern desert 300–1,000+ ft; many wells deepened as water table dropped
- Kern County Environmental Health issues permits
- High drilling activity—use directory to find C-57 contractors serving Kern
Kern County is one of California's most active well drilling regions. Agriculture, oil and gas, and rural residential development all depend on groundwater. If you're planning a well in Kern County, here's what to expect—from geology and depth to permits and finding a licensed driller.
Kern County at a Glance
Kern County spans the southern San Joaquin Valley, from the Tehachapi Mountains to the desert east of Bakersfield. Major cities include Bakersfield, Delano, Ridgecrest, and Tehachapi. The county relies heavily on groundwater for agriculture, oilfield operations, and residential use.
Geology and Typical Depths
The San Joaquin Valley aquifer system underlies much of Kern County. Alluvial deposits—sand, gravel, and silt—overlie older sedimentary formations. Depths vary by location:
- Valley floor (Bakersfield area): 200–600+ feet common; groundwater levels have declined with agricultural pumping
- Eastern Kern (desert): 300–1,000+ feet; deeper and more variable
- Tehachapi and foothills: 200–500+ feet; fractured bedrock in mountain areas
Many older wells have been deepened as the water table has dropped. New wells are often drilled to 400–800 feet or more in the valley to reach productive zones.
See our well depth by region guide for more on Central Valley geology.
Permit Process
Well permits in Kern County are issued by Kern County Environmental Health Services (or the appropriate water agency for your area). The process typically includes:
- Application with property and well design information
- Site plan and proposed well location
- C-57 contractor information
- Fees (check current fee schedule with the county)
In critically over-drafted basins, additional requirements may apply under the Sustainable Groundwater Management Act (SGMA). Kern County has multiple groundwater sustainability agencies; your contractor can advise on local rules.
Timeline: Permit processing often takes 2–6 weeks depending on workload and whether additional review is needed.
Cost Expectations
Kern County wells are often deep, which drives cost. Expect:
- Drilling: $35–$85+ per foot depending on geology
- Typical residential well (400–600 ft): $20,000–$50,000+
- Agricultural or deeper wells: $50,000–$100,000+
See our well drilling costs in California for a fuller breakdown.
Finding a Licensed Driller
Every well drilling project in California must be performed by a contractor with an active C-57 Well Drilling Contractor license. Use our Kern County well driller directory to browse licensed contractors who serve the area. Each listing includes license verification and bond status from the CSLB.
You can also search our main directory by county or city to find drillers in Bakersfield, Delano, Ridgecrest, Tehachapi, and other Kern County communities.
Local Considerations
- Drought and SGMA — Groundwater sustainability plans may affect new well permits in some basins. Check with the county and your contractor.
- Oil and gas — In areas with oilfield activity, well placement and construction may need to account for existing wells and geology.
- Water quality — Some areas have naturally occurring contaminants (e.g., arsenic, boron). Water testing after drilling is important.
- Multiple quotes — Get estimates from 2–3 licensed contractors. Local experience matters for depth estimates and permit handling.
Next Steps
- Review our California well permit guide for an overview of the permit process.
- Use our Kern County directory page to explore drillers and local permit info.
- Contact 2–3 C-57 licensed contractors for quotes and timeline estimates.