Types of Water Wells: Drilled vs. Driven vs. Dug (2026 Guide)

Not all water wells are the same. The type of well you need depends on your property’s geology, water table depth, intended use, and budget. Most residential wells built today are drilled wells, but driven and dug wells still have their place in specific situations.

This guide explains the three main types, what each costs, and how to determine which one is right for your property.

Drilled Wells

Drilled wells are the most common type of residential water well in the United States and the standard recommended by health departments in all 50 states. A drilling rig bores a hole through soil and rock to reach a deep, reliable aquifer.

How They Work

A truck-mounted drilling rig uses either rotary drilling (a spinning drill bit with circulating drilling fluid) or air percussion (a hammering action with compressed air) to bore through earth and rock. As the hole advances, steel or PVC casing is installed to prevent collapse and keep surface water from contaminating the well.

Once the driller reaches a water-bearing formation with adequate yield (typically 5+ gallons per minute for residential use), they install a well screen at the bottom, a submersible pump, and seal the annular space between the casing and the borehole with grout.

Drilled Well Specifications

Specification	Typical Range
Depth	100–800 feet (some exceed 1,000 ft)
Diameter	4–6 inches (residential), 8–12 inches (commercial/irrigation)
Casing	Continuous steel or PVC from surface to bedrock
Cost	$3,000–$15,000+ (national average $7,500)
Cost per foot	$25–$65 for drilling, plus casing and pump
Water yield	5–50+ gallons per minute
Lifespan	30–50+ years
Contamination risk	Low (deep aquifer, sealed casing)

Advantages

• Most reliable water supply — deep aquifers are less affected by drought and seasonal fluctuations
• Lowest contamination risk — sealed casing and deep source protect against surface pollutants
• Highest water yield — can supply entire households, irrigation, and livestock
• Longest lifespan — properly constructed drilled wells last 30–50+ years
• Meets all health codes — accepted by every state health department

Disadvantages

• Highest upfront cost — $3,000–$15,000+ depending on depth
• Requires professional equipment — cannot be DIY
• Longer installation time — 1–3 days for drilling, 1–2 weeks for complete system
• Hard rock increases cost — granite, basalt, and gneiss can push costs to $50–$65+/ft

Best For

Drilled wells are the right choice for most residential properties, especially where the water table is deeper than 25 feet, where reliable year-round supply is needed, or where local health codes require them. If you’re building a new home or replacing an old well, a drilled well is almost always the best long-term investment.

Check our state cost guides for typical drilling depths and per-foot pricing in your area.

Driven (Sand Point) Wells

Driven wells — also called sand point wells or well points — are narrow-diameter pipes driven into the ground by hand or with a small machine. They’re the simplest and cheapest type of well but only work in specific conditions.

How They Work

A hardened steel drive point (a pointed, screened fitting) is attached to the bottom of a series of threaded pipe sections. The pipe is driven into the ground using a post driver, sledgehammer, or small pneumatic hammer until it reaches the water table. Water enters through the screened drive point and is pumped to the surface with a shallow-well jet pump or hand pump.

Driven Well Specifications

Specification	Typical Range
Depth	15–50 feet (limited by suction lift of pump)
Diameter	1.25–2 inches
Casing	Threaded galvanized steel pipe
Cost	$1,000–$4,000 installed
Water yield	1–10 gallons per minute
Lifespan	5–15 years
Contamination risk	Moderate to high

Advantages

• Low cost — $1,000–$4,000, often the cheapest water source option
• Fast installation — can be completed in a few hours
• Possible as a DIY project — simple tools and technique (though permits may still be required)
• Easy to replace — if one fails, you can drive another nearby

Disadvantages

• Only works in sandy, unconsolidated soils — cannot penetrate rock, dense clay, or gravel layers
• Water table must be under 25 feet (suction limit for jet pumps) — impractical in many areas
• Higher contamination risk — shallow depth means surface pollutants can reach the water
• Lower yield — may not supply a full household during peak usage
• Shorter lifespan — screens clog, pipes corrode, typically lasting 5–15 years
• May go dry during drought — shallow sources are vulnerable to seasonal fluctuations
• Not accepted everywhere — some states and counties prohibit or restrict driven wells for primary water supply

Best For

Driven wells work well as secondary water sources (irrigation, garden, livestock), temporary water supply during construction, or primary supply on a budget in areas with sandy soil and a high water table. They’re common in parts of the upper Midwest, coastal plains, and river valleys where conditions are ideal.

Dug Wells

Dug wells are the oldest type of water well, historically created by hand-digging with a shovel and lining the hole with stone, brick, or concrete. Modern dug wells are typically excavated with a backhoe. They’re increasingly rare for new construction but still exist on many older properties.

How They Work

A large-diameter hole (3–5 feet across) is excavated to just below the water table, then lined with concrete tile, stone, or precast concrete rings to prevent collapse. The wide diameter creates a reservoir effect — water seeps in from the surrounding soil and collects in the well, providing storage even when flow rates are low.

Dug Well Specifications

Specification	Typical Range
Depth	10–30 feet
Diameter	3–5 feet
Casing	Concrete tile, stone, or precast concrete rings
Cost	$1,500–$5,000
Water yield	Variable (relies on storage volume)
Lifespan	15–30 years (with maintenance)
Contamination risk	High

Advantages

• Large water storage — wide diameter holds significant volume even with slow recharge
• Accessible for maintenance — can be physically entered for cleaning and repair
• Low-tech — doesn’t require specialized drilling equipment
• Can work where water table is very shallow (under 15 feet)

Disadvantages

• Highest contamination risk — shallow depth and large opening make these vulnerable to surface runoff, insects, animals, and bacteria
• Most likely to go dry — very shallow sources are the first to be affected by drought
• Difficult to properly seal — older dug wells are often the source of groundwater contamination
• Not up to modern code — most states no longer permit new dug wells for potable water
• Safety hazard — open or poorly covered dug wells are a drowning risk for children and animals

Best For

Dug wells are generally not recommended for new construction. If you have an existing dug well, it can continue to serve as a water source if it’s properly maintained, covered, and passes water quality testing. However, many homeowners with aging dug wells choose to drill a new well and properly decommission (seal) the old one.

Side-by-Side Comparison

Factor	Drilled Well	Driven Well	Dug Well
Cost	$3,000–$15,000+	$1,000–$4,000	$1,500–$5,000
Depth	100–800+ ft	15–50 ft	10–30 ft
Diameter	4–6 in	1.25–2 in	3–5 ft
Water yield	5–50+ GPM	1–10 GPM	Variable
Contamination risk	Low	Moderate–High	High
Lifespan	30–50+ years	5–15 years	15–30 years
Soil requirement	Any (rock, clay, sand)	Sand/gravel only	Sand, gravel, soft soil
DIY possible?	No	Yes (with permits)	Rarely practical
Pump type	Submersible	Jet pump or hand pump	Jet pump or hand pump
Best for	Primary residential supply	Secondary/temporary	Existing wells only

How to Choose the Right Well Type

Start with your geology and water table depth. These two factors eliminate most options:

1. Water table deeper than 50 feet? → You need a drilled well. Driven and dug wells can’t reach deep water.

2. Water table under 25 feet in sandy soil? → A driven well is possible and may save money, especially for irrigation or secondary use. A drilled well is still the better choice for primary household supply.

3. Water table under 15 feet in soft soil? → A dug well is technically possible, but a drilled well is strongly recommended for health and reliability reasons.

4. Rocky geology? → Drilled well is your only option. Driven and dug wells cannot penetrate bedrock.

Then consider your use case:

• Primary household water supply → Drilled well (always the safest, most reliable option)
• Irrigation, garden, or livestock → Driven well may be sufficient and much cheaper
• Off-grid cabin or seasonal property → Driven well with a hand pump can work in areas with shallow water tables
• Existing dug well on property → Test water quality annually; plan to replace with a drilled well if quality declines

What About Your State?

Well depth, geology, and drilling costs vary significantly by state. Visit our state cost guides for detailed pricing specific to your location, including average well depths, per-foot drilling rates, permit requirements, and water quality information.

Ready to get started? Get free quotes from licensed well drillers in your area to compare prices for your specific project.