San Bernardino County is the largest county in the contiguous United States by area, spanning over 20,000 square miles from the San Bernardino Mountains to the Mojave Desert. This vast region relies heavily on groundwater, particularly in the High Desert communities where surface water is scarce.
📋 In This Guide
- San Bernardino County Well Overview
- High Desert Region Statistics
- Mountain Region Statistics
- Well Permits & Regulations
- Drilling Costs by Region
- Groundwater Basin Status
- Water Quality Data
- Top Communities by Well Count
- Well Problems & Failures
- Frequently Asked Questions
- Need Well Services in Southern California?
This statistics page provides comprehensive data on wells throughout San Bernardino County, including the unique challenges of desert drilling and mountain region aquifers.
San Bernardino County Well Overview
High Desert Region Statistics
Mountain Region Statistics
Well Permits & Regulations
Drilling Costs by Region
Groundwater Basin Status
Water Quality Data
Top Communities by Well Count
Well Problems & Failures
Frequently Asked Questions
How many wells are in San Bernardino County?
San Bernardino County has approximately 38,500 registered wells, including 22,100 active domestic private wells, 8,900 agricultural wells, and 4,200 public supply wells. The High Desert region (Victor Valley) has the highest concentration with over 14,200 wells, as many rural communities lack access to municipal water systems.
What is the average well depth in the High Desert?
In San Bernardino County's High Desert region, average well depths are: Victorville area 485 feet, Apple Valley 520 feet, and Hesperia 380 feet. Desert wells are typically deeper than mountain wells due to lower water tables. Some properties require wells exceeding 600 feet, especially in areas affected by groundwater depletion.
How much does it cost to drill a well in San Bernardino County?
Well drilling costs vary by region: High Desert averages $52,000, mountain communities $45,000, and valley floor areas $38,000 for a complete system. Per-foot drilling costs range from $45-75 in alluvial soil to $60-110 in hard rock formations. Deep desert wells (600+ feet) can exceed $95,000.
What is the Mojave Basin adjudication?
The Mojave Basin was adjudicated in 1996 to manage groundwater rights in the severely overdrafted High Desert region. It's the largest adjudicated basin in California. Property owners have allocated water rights (Base Annual Production), and pumping beyond allocations requires purchasing credits at $250-450 per acre-foot.
What water quality issues affect San Bernardino County wells?
About 28% of San Bernardino County wells have elevated arsenic levels, and 19% exceed nitrate standards. Average TDS is 650 ppm in the High Desert and 420 ppm in mountain areas. Arsenic and fluoride are primary concerns, and approximately 85% of wells benefit from some form of water treatment.
Why is the well failure rate higher in the desert?
The High Desert has a 4.1% annual well failure rate compared to 2.8% in mountain areas. This is due to deeper pumping depths, sand infiltration, extreme temperature stress on equipment, and declining water tables. Pumps typically last only 16 years in desert conditions versus 18-20 years elsewhere.
Need Well Services in Southern California?
Southern California Well Service provides professional well drilling, pump repair, and water testing throughout San Diego, Riverside, and surrounding counties.
