Because Of The Pressure.
In an artesian well the aquifer is sandwiched between impermeable rock and that creates positive pressure. When the well is drilled the water has a route to air and is forced to the surface.
It's the same as a natural spring with a geyser.
if the water rises above the surface without any help, it's an artesan well
In an artesian well, water rises because of pressure sustained within the aquifer. In this system, water sometimes escapes to the surface to cause artesian springs.
Naturally flowing water wells are called "Artesian" wells.An artesian well
The difference between an artesian basin and artesian wells is that the basin keeps the water contained underground and the well has water in it that rises under its own pressure.
This type of well is called an Artesian Well. If the pressure is great enough to raise the water above the ground level, it is called a Flowing Artesian Well.
That is true.
An Artesian well, or commonly a spring, will flow of their own accord.
In some ground formations there is an impermeable layer which holds the water beneath it under pressure. In such a case where a well penetrates the impermeable layer, the water rises through the upper layers of the ground and even above ground-surface level
Artesian water is usually cleaner than other well water
That is called "artesian water" .That is called "artesian water" .
An artesian well is a water source that is generally at the bottom of a mountain or hill where the hill above collects water in the soil and this accumulated water has hydrostatic pressure and force which results in the water rising from the ground at the bottom of the hill or higher area.
Most artesian water is quite pure but all Well water should be tested before drinking.