Off-Grid Water: Everything You Need to Know Before Drilling a Well
Water is the most critical decision on any off-grid property. Get it right and you have unlimited clean water for life. Get it wrong and you have a $10,000 hole in the ground.
Here is what to know before you drill.
Types of Wells
Dug wells: Shallow, hand-dug or excavated. Cheap but vulnerable to contamination and drought. Not recommended.
Drilled wells: The standard. A drilling rig bores 4 to 6 inches down until hitting an aquifer. Cased with steel or PVC. This is what you want.
Bored wells: Larger diameter, still relatively shallow. Better than dug, worse than drilled for most purposes.
For off-grid living on raw land: drilled well only.
Cost in Missouri
Missouri average: $8,000 to $12,000 for a 100 to 200 foot well.
Breakdown:
- Drilling: $15 to $30 per foot
- Well casing and cap: $800 to $2,000
- Pump and pressure tank: $1,500 to $3,000
- Electrical hookup: $500 to $1,500
- Well permit: $50 to $200 depending on county
Rocky or deep aquifer areas cost more. Saline County MO generally has good groundwater at 80 to 150 feet in most areas.
Before You Drill: Research First
Missouri Well Viewer: water.wellntel.com or contact Missouri DNR at 573-751-4422. Free well records showing depth, yield, and water quality of nearby wells. The most important research step.
USGS Groundwater Data: waterdata.usgs.gov — national aquifer depth and recharge data.
County health department: Required well permits. Also has records of past failed wells in the area.
If wells within half a mile of your property are at 100 feet and producing 5+ gallons per minute, you are in good shape. If neighbors have reported dry wells or contamination issues, those are red flags.
The Hydrology Report
Some areas offer hydrogeological assessments. A licensed hydrogeologist assesses your land for $500 to $1,500 and tells you:
- Estimated depth to water
- Expected yield in gallons per minute
- Contamination risk
- Best location on the property to drill
For a $10,000+ investment, this is insurance worth buying.
Yield Requirements
Minimum for a family of 4: 2 to 3 gallons per minute
Comfortable: 5+ gallons per minute
Agricultural use: 10+ gallons per minute
A well that yields 1 gallon per minute can be made workable with a storage tank, but it limits your options. Know before you drill.
Water Quality Testing
Always test before drinking. Missouri DNR recommends testing for:
- Coliform bacteria
- Nitrates
- pH
- Hardness
- Iron and manganese
Basic test kit: $30 to $80. Certified lab test: $150 to $400.
Saline County has agricultural areas with higher nitrate risk from fertilizer runoff. Test specifically for nitrates.
Off-Grid Pump Options
Standard electric submersible pump: Most common. Requires consistent power. Works with solar if you size the system correctly.
Solar-direct pump (DC): Pumps only when sun is shining into a storage tank. Simple and reliable. No battery needed for pumping. 12V or 24V systems available.
Hand pump: Backup option. Always install a hand pump access port on your well casing. When power fails, this keeps you alive.
For our Hood Homestead build: solar-direct pump into a 1,000 gallon above-ground storage tank, gravity-fed to the container with a hand pump backup. Total system under $3,000.
Rainwater Supplemental
A metal roof on a 40-foot container captures roughly 1,000 gallons in a 1-inch rain event. Missouri averages 42 inches of rainfall per year — well distributed across seasons.
A 2,500 gallon poly tank costs $800 to $1,500 and pays for itself fast.
Never rely solely on rainwater in Missouri — summer droughts happen. But as a supplement to a drilled well, it reduces pump load significantly.
The Red Lines
- Never buy rural land without checking nearby well records first
- Never skip a water quality test
- Always install hand pump access on the casing
- Budget 20 percent over estimate for unexpected depth or rock
- Get the well permit before you drill, not after
Our Plan
The Hood Homestead water system:
- Drilled well, 150 feet estimated depth, Saline County MO
- Solar-direct submersible pump to 1,000 gallon storage tank
- Gravity pressure system to container interior
- Hand pump backup at wellhead
- 2,500 gallon rainwater collection from container roof
Estimated total cost: $9,500 to $14,000. We will document every step.
Part of the Hood Homestead build log. Follow at thehoodhomestead on Dev.to.