Idaho Water Well
Drilling Cost
The average residential well in Idaho is 200 feet deep and costs $8,400 in 2026. Drilling rates range from $28 to $65 per foot, with total project costs varying based on depth, geology, and pump system.
Avg. Well Depth
200 ft
Cost / Foot
$28–$65
Total Project
$8,400
vs. National
12% above avg.
Idaho Well Drilling Cost by Depth
| Well Depth | Drilling Only | Complete System | Est. Total |
|---|---|---|---|
| 100 ft | $2,800–$6,500 | $7,600–$11,300 | $9,000 |
| 150 ft | $4,200–$9,750 | $9,400–$14,950 | $11,500 |
| 200 ft | $5,600–$13,000 | $11,200–$18,600 | $14,000 |
| 300 ft | $8,400–$19,500 | $14,800–$25,900 | $19,000 |
| 400 ft | $11,200–$26,000 | $18,400–$33,200 | $24,000 |
| 500 ft | $14,000–$32,500 | $22,000–$40,500 | $29,000 |
*Drilling only = drilling labor per foot. Complete system includes casing, pump, pressure tank, electrical, and permits. Costs are Idaho estimates for 2026.
Idaho Well System Component Costs
| Service | Low | High | Average |
|---|---|---|---|
| Well Casing — PVC (200 ft) | $1,200 | $2,200 | $1,600 |
| Well Casing — Steel (200 ft) | $6,000 | $26,000 | $13,000 |
| Submersible Pump | $300 | $2,000 | $1,000 |
| Pressure Tank | $500 | $2,000 | $1,100 |
| Electrical Hookup | $1,000 | $3,000 | $1,800 |
| Permits | $100 | $400 | Varies |
| Water Quality Testing | $50 | $500 | $200 |
*Component costs based on Idaho average well depth of 200 ft. Steel casing is typically required for bedrock wells; PVC is used in unconsolidated formations.
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Itemized Cost Estimate
This estimate is 87% above the Idaho average of $8,400
Estimates are approximate. Actual costs depend on site conditions and contractor pricing.
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Idaho Geology & Aquifers
Southern Idaho's Snake River Plain features the massive Eastern Snake River Plain Aquifer in fractured basalt, one of the most prolific aquifers in North America. Northern Idaho has more complex geology with granitic batholith rock and metamorphic formations.
Understanding your local geology is important because rock type directly affects drilling cost. Hard crystalline rock (granite, gneiss) costs more to penetrate than soft sedimentary formations (sandstone, limestone) or unconsolidated deposits (sand, gravel). Your well driller can estimate costs based on nearby well logs.
Primary Aquifer
Eastern Snake River Plain Aquifer
Water table depth: 50-300 feet across the Snake River Plain; 100-500 feet in mountainous northern Idaho
Best Drilling Season
April through October; mountain areas and northern Idaho have shortened seasons due to snow and frozen ground
Population on well water: About 25% of Idaho households use private wells, one of the highest rates in the western states, driven by rural agriculture communities
Why Well Depth Varies in Idaho
Wells in Idaho range from 50 to 600 feet deep. The wide range is driven by regional differences in geology, water table depth, and aquifer type. A well in one part of the state may cost significantly more or less than another area just 50 miles away.
50 ft
Shallowest typical wells
Usually in areas with high water tables, sandy soils, or alluvial aquifers near rivers
200 ft
State average depth
Typical residential well for most Idaho locations
600 ft
Deepest typical wells
Usually in arid areas, mountain terrain, or where shallow aquifers are depleted
Idaho Well Drilling Permits & Regulations
Idaho requires all well drillers to be licensed by IDWR. There is no homeowner exemption — only licensed drillers may construct water wells.
Permit Authority
- Authority
- Idaho Department of Water Resources (IDWR); all wells require a drilling permit and a water right
- Permit Cost
- $100-$400
Water Rights
- Doctrine
- Prior Appropriation; domestic wells generally receive a statutory right but new appropriations require a permit from IDWR
Well Water Quality in Idaho
Well water quality in Idaho varies by location and aquifer type. Testing your water at least annually is recommended, and a comprehensive test should be done before using a new well.
Common Water Quality Issues
nitrate
Treatment: reverse osmosis or ion exchange system
arsenic
Treatment: reverse osmosis or adsorption media filter
fluoride
Treatment: reverse osmosis or activated alumina filter
uranium
Treatment: reverse osmosis or ion exchange system
perchlorate from agricultural areas
Treatment: appropriate treatment system
Testing Recommendations
- Before first use: Full panel including bacteria, nitrates, pH, and state-specific contaminants ($150–$500)
- Annually: Bacteria (coliform) and nitrate testing at minimum ($50–$100)
- After flooding or repairs: Bacteria test to confirm well integrity ($25–$50)
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Well Drilling Costs by City in Idaho
Well drilling costs vary by location within Idaho. Select a city for local pricing details.
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