Wells
How dug, driven, and drilled wells differ
Dug, driven, and drilled wells are named for how the hole is made. The type describes the ground and the method. It is not a catalog of products.
On this page
Water wells are grouped by how the hole is made. Dug, driven, and drilled wells reach water in different ground, at different effort, and with different limits. The type is a description of construction. It is not a product line, and it is not a promise that the water is fit to drink.
Dug wells
A dug well is a wide hole, usually shallow, lined so the sides do not collapse. People dig it with hand tools, or a machine excavates it. It draws water from a shallow layer. Because the hole is wide and close to the surface, waste from a latrine, an animal yard, or a flood can reach it. A lining and a cover reduce that risk. They do not remove it.
A dug well can be the right method where the water sits near the surface and a rig cannot come. It is a poor method where the shallow layer is already contaminated, or where the only reliable water is deeper than a wide hole can go.
Driven wells
A driven well is a pipe with a screened point, pushed or hammered into loose sand or gravel. It fits ground that a pipe can enter. It does not fit rock. The hole is narrow. The water comes from a shallow saturated layer, so the surface risks that affect a dug well can still apply, with less open area.
Calling a driven well a smaller dug well misses the point. The method only works in ground a pipe can enter. In the wrong ground it is not a bargain. It is the wrong tool.
Drilled wells
A drilled well is a bore made by a rig. It can go through soil into rock, and it can reach deeper water than a dug or driven well in the same place. Deeper is not the same as safe. A deep bore can still hit salty water, arsenic, or a dry fracture. The rig, the casing, the seal, and the pump are separate pieces of work.
The type name only says how the hole was made. It does not say who owns the pump, who replaces it, or what the first water test found.
What the hole tells you
- A wide, lined, shallow hole. Likely dug.
- A narrow pipe pushed into sand or gravel. Likely driven.
- A bore made by a rig, often cased. Likely drilled.
- Any of the three with no test. Still an unknown drinking-water result.
The type is not a safety proof
Dug, driven, and drilled describe construction. They do not describe a brand, a warranty, or a drinking-water result. Two drilled wells a short walk apart can differ because the ground differs. A household choosing among types is choosing a way to reach water in known ground, then a way to keep waste out of that water, then a test.
A gift well appeal should say which of these methods it means. That appeal is explained with gift wells. Why the methods do not share one figure is a separate cost note.
Three methods, three limits
| Method | How the hole is made | Where it fits |
|---|---|---|
| Dug | A wide hole, lined, usually shallow. | Water near the surface. Easy to contaminate from above. |
| Driven | A screened pipe pushed into loose ground. | Sand or gravel a pipe can enter. Not rock. |
| Drilled | A bore made by a rig, then cased. | Can reach deeper water. Depth is not a safety result. |