abandoned well
a well that is no longer used or maintained for future use.
a water bearing layer or formation that cannot yield sufficient water for wells.
a water bearing formation that yields water to wells in usable amounts.
artesian aquifer
a water bearing formation in which water is under sufficient pressure
that the water level rises above the top of the aquifer.
artesian well
a water well drilled into an artesian aquifer where enough pressure exists
for the water to flow to the surface without pumping. It is synonymous with a flowing
artesian well.
solid rock that usually underlies layers of loose soil material; bedrock may also be
exposed to the land surface.
bored wells
a large diameter well that is constructed when low yielding groundwater
sources are found usually within 30 m (100 ft.) of the ground surface. The larger diameter
well casing is usually .3-.9 m (1-3 ft.) in diameter and can provide the additional water
storage required during times of high water demand.
a hole drilled, bored or dug into the ground in which a well casing is placed.
a metal, plastic or fiberglass pipe installed in a well borehole to maintain the well
opening and contain the well pumping equipment.
a tank or reservoir used for storing water. Cisterns are sometimes used with
low producing water wells to provide the necessary water required during times of high
water demand.
coliform bacteria
bacteria that are used in testing water to indicate the possible presence
of more harmful disease-causing pathogenic bacteria.
confined aquifer
an aquifer that lies between two relatively impermeable rock layers.
the deterioration in natural water quality caused by the introduction of
foreign matter into water.