What might cause a well to hold less water each year?

Question

answers:

The rocks in the well become harder.
The rocks in the well become harder.

The groundwater reaches freezing temperature
The groundwater reaches freezing temperature

an earthquake shifted the aquifer to a new spot
an earthquake shifted the aquifer to a new spot

The aquifer has slowly become dry over time.
The aquifer has slowly become dry over time.

Answer 1

The well may be experiencing increased evaporation due to hotter and drier weather conditions.
The well may be experiencing increased water extraction by nearby agricultural or industrial activities.
The well may be suffering from leaking or damaged pipes or infrastructure.
The well may be affected by contaminated groundwater, reducing its usable capacity.
The well may have a decrease in the recharge rate of groundwater due to changes in precipitation patterns or land use activities.
The well may be affected by subsidence or land sinking, leading to a lower water level.