Over-pumping a water well will put additional strain on a water well system and can even cause pump damage by overheating and excessive cycling of the well pump.
Many of the municipal or community water systems likely impose local summer water restrictions on users of many Fraser Valley water systems because of the massive demand for water, obviously these relentless conditions cannot be maintained.
Private water wells in the Fraser Valley are not governed in the same way and should not be over-pumped, they need to be carefully managed.
De-watering a water well is also caused by extended over-pumping of a well which is the number one cause of water well failure.
The pumping rate of a well should always be restricted to stabilize the draw-down of the pumping water level whether it’s a deep drilled rock hole or a shallower screened well.
In drilled rock holes over-pumping may cause the fractures to lose pressure and even collapse, in time this can greatly reduce the production of drilled well.
When drawing-down a screened well it’s very important that the water-level remains above the intake part of the water well, adjacent to the perforations in the casing or the screen slots.
Pumping water down to a level that exposes the water well screen, possibly allows additional oxygen to enter the aquifer which aerobically enhances the growth of iron or sulphate reducing bacteria, eventually can restrict the flow into the well or plug the well screen reducing water flow in a well substantially.
We’ve often pulled pumps that have been installed right down into a well screen, for the reason explained a well pump needs to be installed above the installed well screen.