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Well Drilling in Colorado

Avg. $6,000 - $25,000 · One-time (well lifespan 30-50 years)

Cities

$6,000 - $25,000

Avg. Cost

Water well drilling is the process of boring a hole into the earth to access underground aquifers that provide fresh water for drinking, irrigation, and household use. Approximately 43 million Americans rely on private wells as their primary water source. Residential wells typically range from 100 to 500 feet deep depending on the local geology and water table depth, though some areas require wells exceeding 1,000 feet. The drilling method depends on the geological conditions — rotary drilling is most common for deep wells through rock formations, while cable tool (percussion) drilling works well in unconsolidated materials like sand and gravel. After drilling, the well is cased with steel or PVC pipe to prevent contamination from surface water, and a submersible pump is installed at the appropriate depth to bring water to the surface. A pressure tank system in your home maintains consistent water pressure. The complete system includes the well itself, casing, pump, pressure tank, and connection piping. New wells require permits from state or local water authorities, and most states mandate a water quality test before the well can be used. Costs vary enormously by region and depth — from $6,000 in the Southeast to over $30,000 in areas with deep bedrock or difficult drilling conditions.

Colorado Regulations for Well Drilling

Colorado regulates onsite wastewater treatment systems (OWTS) through the Colorado Department of Public Health and Environment (CDPHE), specifically Regulation 43 (5 CCR 1002-43). Local county public health departments administer permits and inspections under delegation from CDPHE. A site assessment must be completed by a licensed professional engineer or registered sanitarian before a permit is issued. The assessment evaluates soil percolation rates, seasonal high groundwater, and setback distances. Required setbacks include 50 feet from water supply wells, 15 feet from property lines, and 50 feet from streams and water bodies. Colorado's high-altitude conditions, including shallow rocky soils and frost depths exceeding 36 inches in mountain counties, often necessitate engineered alternative systems. CDPHE maintains a statewide OWTS database for tracking permits, inspections, and maintenance records. Operations and maintenance plans are required for all alternative treatment systems and must be filed with the county. Homeowners pumping less than 500 gallons per day are exempt from certain commercial requirements, but all residential systems must meet Regulation 43 design standards.

Licensing Requirements

Colorado requires OWTS designers to hold a Professional Engineer (PE) license or be a Registered Sanitarian (RS) recognized by CDPHE. Installers must obtain a county-issued contractor license and pass a competency exam in most jurisdictions. Pumping and hauling contractors must register with CDPHE and comply with septage land application rules under Regulation 62. Continuing professional education is required for PE and RS renewal every two years. Soil morphology evaluations must be conducted by a licensed soil scientist or PE with demonstrable geotechnical experience.

Environmental Considerations

Colorado's diverse geography creates highly variable soil and groundwater conditions for septic system performance. The Front Range urban corridor features clay-heavy soils with poor percolation that often require mound or drip irrigation systems. High-altitude mountain counties experience frost depths of 36 to 48 inches, requiring insulated system components and freeze-resistant designs. Eastern plains soils are sandy loams with good drainage but proximity to the shallow Ogallala Aquifer demands careful siting. The state's semi-arid climate (12-17 inches annual precipitation along the Front Range) limits soil biological activity, slowing treatment. Wildfire-affected areas face accelerated runoff and erosion that can compromise drainfield function.

Signs You Need Well Drilling

Building a new home without access to municipal water supply
Existing well has gone dry or produces insufficient water
Water quality has deteriorated beyond what treatment can fix
Adding irrigation needs that exceed existing well capacity
Existing well is contaminated and cannot be rehabilitated

The Well Drilling Process

1 Site assessment and hydrogeological survey to identify the best drilling location
2 Obtain required drilling permits from state or local water authority
3 Mobilize drilling rig and begin boring through soil and rock layers
4 Install well casing and screen at the appropriate aquifer depth
5 Develop the well by pumping to clear drilling debris and maximize flow
6 Install submersible pump, pressure tank, and connection piping
7 Conduct water quality testing and obtain certificate of completion

Frequently Asked Questions — Well Drilling in Colorado

How much does it cost to drill a well?

Well drilling costs $15-$85 per foot depending on geology, plus pump, casing, and completion. Total project costs by region: Southeast $6,000-$12,000 (shallow aquifers), Mid-Atlantic $12,000-$18,000, Midwest $8,000-$12,000, and Western states $20,000-$50,000+ (hard rock, deep aquifers). The biggest cost driver is depth — research nearby well logs before requesting quotes.

How deep does a residential well need to be?

Deep enough to reach a reliable aquifer with adequate yield (3-5 gallons per minute minimum for most homes). Average depths vary dramatically: Florida 40-80 feet, Southeast 100-200 feet, Mid-Atlantic 150-300 feet, and Western mountain areas 300-600 feet. Your county may have well log databases showing depths of nearby wells — this is the best predictor of what your well will require.

How long does it take to drill a well?

The drilling itself takes 1-3 days for most residential wells. However, the full timeline includes permitting (1-4 weeks), driller scheduling (1-4 weeks depending on season), drilling and completion (1-3 days), water quality testing (1-2 weeks for lab results), and plumbing connection (1-2 days). Total timeline from decision to running water is typically 4-10 weeks.

What happens if the driller does not hit water?

Policies vary by driller. Most charge their per-foot rate regardless — you pay for the hole whether it produces water or not. Some offer depth guarantees (drill up to a set depth before declaring dry). A few provide dry hole insurance (adds 10-15% to the quote). In the eastern US, dry holes are uncommon (under 5%). In western hard-rock areas, rates reach 10-15%. Ask about dry hole policy before signing any contract.

Find Well Drilling in Colorado Cities

Browse 2 cities in Colorado for well drilling providers.

Colorado Springs, CO Pop. 478,961

Denver, CO Pop. 715,522

Other Services in Colorado

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Well Drilling in Colorado

Colorado Regulations for Well Drilling

Licensing Requirements

Environmental Considerations

Signs You Need Well Drilling

The Well Drilling Process

Frequently Asked Questions — Well Drilling in Colorado

Find Well Drilling in Colorado Cities

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