I know around here they usually put a watering ban in effect, odd and even days for the odd even numbered houses. They pull from various places, like lakes and right form the ground, but what happens here is that the demand is higher than the supply so the water level in the water towers gets pretty low.
HOWEVER, in the area I live, there are many people that are NOT on city water like us, we have our own well point and pump, so they can't bother us. I actually just helped a buddy that IS on city water install a well point so they can fill their pool, but later in the summer be able to wash cars or water the lawn even if there is a watering ban in effect.
As for the farmers watering all the time, they usually have their own supply of water or pull it out of the ground, so they are not affected by any kind of watering ban.
Support This site