- Incrustation from mineral deposits
- Bio-fouling by the growth of microorganisms
- Physical plugging of the aquifer (the saturated layer of sand, gravel, or rock through which water is transmitted) by sediment
- Sand pumping
- Well screen or casing corrosion
- Well – Borehole collapse
- Pump damage
![Image](https://chevalierdrilling.com/wp-content/uploads/2019/07/Pic-8-e1563475713314-300x207.jpg)