Static Water Level

Static water level should be measured annually since a drop may indicate aquifer depletion.”

The static water level is the level of the water in a well when the pump is not operating. It is generally expressed as the distance, in feet, from ground level down to the water level in the well casing. Keep in mind the word static means not in physical motion. The well casing should have an access port or some feature that allows water level measurements to be taken.  The static water level should be measured after the pump has been idle (not running) for several hours or overnight. Two common methods are used to determine the static water level in a well: the electric tape method and the air line method.  

As a rule of thumb, static and pumping water levels should be measured annually. Compare the current static water level with the level at the time of well construction. A decline in the static water level over time may indicate aquifer depletion.  If aquifer depletion is confirmed, you may have to reduce water use, install a storage reservoir to meet peak water requirements (demand), drill a deeper well, or drill one that taps into another aquifer.