Idaho Water Well Depth & Drilling Cost Guide
Authoritative hydrogeological intelligence for Idaho. Regulated by the Idaho Department of Water Resources (IDWR). The statewide median drilling depth is 230 feet (ranging 60–650 ft) with an average drilling cost of $46 per foot ($32 to $75/ft).
Quick Hydrogeological Fact Sheet: Idaho
To reach potable water in Idaho, residential wells require drilling an average of 230 feet deep. Total turnkey installation costs average $12,400 USD for a completed 6-inch casing well, 1.5 HP submersible pump, pressure tank, and state permits. The standing static water table sits at approximately 52 feet below surface level, producing a reliable average flow rate of 25 GPM across the primary Snake River Plain Aquifer (Eastern & Western).
Idaho County-Level Well Logs & Average Depths
Official USGS hydrogeological monitoring stations, static levels, and driller completion records.
| County Name | Median Depth (ft) | Avg Cost / Foot | Typical Yield | Primary Aquifer | Local Action |
|---|---|---|---|---|---|
| Ada County | 210 ft | $44 /ft | 26 GPM | Boise Basin Alluvium |
|
| Kootenai County | 280 ft | $52 /ft | 30 GPM | Rathdrum Prairie Aquifer |
💰 Estimated Turnkey Cost Itemization in Idaho
Component-by-component breakdown for a standard residential water well (230 ft average).
| System Component | Specification in Idaho | Unit Cost | Estimated Subtotal |
|---|---|---|---|
| Borehole Drilling & Sanitary Casing | 230 ft depth with standard 6" PVC/Steel Casing & Drive Shoe | $46 /ft | $10,580 USD |
| Submersible Pump & Drop Pipe | 1.0 HP – 1.5 HP Stainless Submersible Pump with 12-gauge electrical drop cable | Turnkey Pump Unit | $2,250 USD |
| Pressure Tank & Control Switch | 40-gallon Captive Air Pressure Tank, 40/60 PSI Pressure Switch & Gauge | Standard Assembly | $1,200 USD |
| State Permits, Sanitary Grouting & Lab Water Testing | Mandatory Idaho Department of Water Resources (IDWR) permit, bentonite surface seal, and EPA drinking panel | State Fee + Lab | $650 USD |
| TOTAL ESTIMATED TURNKEY INVESTMENT | Includes excavation, drilling, plumbing hookup, and water inspection | $12,400 USD | |
Idaho Aquifers & Subsurface Geology
Volcanic basalt layers, layered sedimentary rock, fractured granite
Water Quality & Recommended Filtration
⚖️ Idaho Well Drilling Regulations & Legal Setbacks
Calculate Drilling Cost in Idaho
Pre-loaded with Idaho median depth (230 ft) and average cost ($46/ft).
Frequently Asked Questions: Drilling Wells in Idaho
1. How deep do you usually have to drill for water in Idaho?
Across Idaho, the median residential water well is drilled to 230 feet. However, shallow alluvial wells can hit water as high as 60 feet, while deep bedrock or limestone aquifer wells may require drilling down to 650 feet to reach sufficient pressure and yield.
2. How much does a complete water well cost in Idaho?
On average, homeowners in Idaho invest $12,400 USD for a complete turnkey system. Drilling alone costs $46 per foot (ranging $32–$75/ft), while submersible pumps, pressure tanks, state permit fees ($200), and electrical hookups comprise the remaining balance.
3. What is the required setback from septic tanks in Idaho?
State health mandates overseen by the Idaho Department of Water Resources (IDWR) require a minimum separation distance of 100 feet from any septic tank, leach field, or potential contamination source, plus at least 25 feet from adjacent property boundaries.
4. What is the groundwater quality like in Idaho?
Wells in Idaho typically yield water with a hardness reading around 175 PPM and an average pH of 7.6. Key minerals present in natural groundwater include Calcium, Silica, Volcanic Ash particulates. The recommended standard filtration configuration is: Sediment Pre-filter + Ion-Exchange Softener.
🗺️ Neighboring & Regional Groundwater Guides
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