If your power went out and you have no water when the power is restored, it could be a problem with the well pump. Fortunately, you may be able to repair the problem on your own. Below is some more information about this so you can get your water turned back on.
Check Circuit Breaker
It could be something as simple as a tripped circuit breaker. Find your breaker panel, which may be in the garage or in a hallway, and open the cover. Find the breaker that controls the well pump. In most breaker boxes, each breaker is labeled to show what that breaker controls. If the breaker is off turn it back on and check the water. If you still have no water turn the breaker off and then back on again.
If the breaker automatically turns back off when you flip it on then you need to contact an electrician to take care of this problem for you. You should do this immediately, as a bad breaker could result in a house fire.
Check Low Pressure Switch
In many cases, the cause of a well pump not working after a power outage is the low-pressure switch turned off. This is because if you use water when your power is out, the water pressure in the tank drops below the minimum setting. When this happens, the well pump turns off automatically to prevent damage to it. This prevents you from running the well pump when it is dry, which can lead to severe damage, and you would likely have to have the well pump replaced.
Look on the pressure tank and you will see a cover. Under this cover is the pressure switch. Before you do anything turn the breaker off to the well pump. Remove the cover carefully and you will see a lever. If the lever is down, then the pressure switch is turned off. Use a pair of pliers to carefully lift the lever until you hear the water pump start.
The pressure on the pressure gauge should also be at the right level. What this level is depends on the type of well pump you have. Refer to the owner's manual to determine this information.
Once the pressure is at the right level put the cover back on and check the water inside your home to ensure it is working. It may take a few minutes for your water pressure to come back to normal.
Contact a well company if you cannot get the well pump restored after a power outage.