i think the percentage is about 25%
people use to drink river water because in poor country many of them drink .If they don't they will die.But in American many people use to drink fresh water.
atleast 50%
They are rocks in the ground that filter water, and you use them by drinking from them!
people planting fruit trees in their back yard
atleast 50%
They extracted it from rivers and ground wells and used canals to irrigate crops.
I believe they were used for irrigation. definitely to pump water out of the ground whether for crops or not.
75%
Unless the ground water is recharged (from rain) the water table level will fall and the wells will need to be sunk deeper. The level of the ground may also sink slightly. Eventually the wells dry up and there is no more groundwater to extract.
water
People can obtain water from an aquifer by drilling a well into the ground until it reaches the water table of the aquifer. A pump is then installed to lift the water to the surface for use. Proper management and monitoring of groundwater extraction is essential to ensure sustainable use of the aquifer's water resources.
Well water IS normal water.