Missouri Water Well Depth & Drilling Cost Guide
Authoritative hydrogeological intelligence for Missouri. Regulated by the Missouri Department of Natural Resources (MoDNR). The statewide median drilling depth is 280 feet (ranging 75–650 ft) with an average drilling cost of $37 per foot ($26 to $64/ft).
Quick Hydrogeological Fact Sheet: Missouri
To reach potable water in Missouri, residential wells require drilling an average of 280 feet deep. Total turnkey installation costs average $11,200 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 65 feet below surface level, producing a reliable average flow rate of 15 GPM across the primary Ozark Aquifer (Roubidoux, Gasconade).
Missouri 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 |
|---|---|---|---|---|---|
| St. Louis County | 240 ft | $38 /ft | 14 GPM | Mississippian Limestone |
|
| Greene County | 380 ft | $42 /ft | 18 GPM | Roubidoux Dolomite |
💰 Estimated Turnkey Cost Itemization in Missouri
Component-by-component breakdown for a standard residential water well (280 ft average).
| System Component | Specification in Missouri | Unit Cost | Estimated Subtotal |
|---|---|---|---|
| Borehole Drilling & Sanitary Casing | 280 ft depth with standard 6" PVC/Steel Casing & Drive Shoe | $37 /ft | $10,360 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 Missouri Department of Natural Resources (MoDNR) permit, bentonite surface seal, and EPA drinking panel | State Fee + Lab | $575 USD |
| TOTAL ESTIMATED TURNKEY INVESTMENT | Includes excavation, drilling, plumbing hookup, and water inspection | $11,200 USD | |
Missouri Aquifers & Subsurface Geology
Karst dolomite, chert, limestone with deep cavernous flow in Ozarks
Water Quality & Recommended Filtration
⚖️ Missouri Well Drilling Regulations & Legal Setbacks
Calculate Drilling Cost in Missouri
Pre-loaded with Missouri median depth (280 ft) and average cost ($37/ft).
Frequently Asked Questions: Drilling Wells in Missouri
1. How deep do you usually have to drill for water in Missouri?
Across Missouri, the median residential water well is drilled to 280 feet. However, shallow alluvial wells can hit water as high as 75 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 Missouri?
On average, homeowners in Missouri invest $11,200 USD for a complete turnkey system. Drilling alone costs $37 per foot (ranging $26–$64/ft), while submersible pumps, pressure tanks, state permit fees ($125), and electrical hookups comprise the remaining balance.
3. What is the required setback from septic tanks in Missouri?
State health mandates overseen by the Missouri Department of Natural Resources (MoDNR) require a minimum separation distance of 100 feet from any septic tank, leach field, or potential contamination source, plus at least 30 feet from adjacent property boundaries.
4. What is the groundwater quality like in Missouri?
Wells in Missouri typically yield water with a hardness reading around 190 PPM and an average pH of 7.5. Key minerals present in natural groundwater include Calcium, Magnesium, Bacterial Vulnerability in Karst. The recommended standard filtration configuration is: UV Disinfection System + Water Softener.
🗺️ Neighboring & Regional Groundwater Guides
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