Update
In answering some of your questions...
When I measure the voltage, one probe is placed in the water and the other is into the ground approximately 3 ft out from the pool. I have also done this by connecting one probe to a separate grounding rode more than 15 ft from the pool and the other probe in the water. Another way is to place one probe in the water and the other on a wet section of the concrete. I have noticed higher readings in the sleeves which holds the rails and ladder in the concrete. This is done by placing one probe at the bottom of the sleeve or in the ground beneath it and placing the other probe on wet concrete in the same area.
There is no doubt voltage in the water. Engineers from the utility company have measured the same voltage but claim it is my responsibility. I have noticed a change in the voltage with the load on the utility. The voltage appears to increase as more load is put on the grid. Higher voltage readings occur mid/early evening, hot days, summer months. During the winter, I still observed readings but minimal, <.5.
The pool is fresh water. I have been told that if it was a salt water pool, the readings would be much higher.
Whether or not my homes main breaker is on or off, if the homes electrical, cable, and telephone ground is disconnected from the ground rod, or my utility meter is pulled from my home, the voltage is still there without any change.
My home was built in 96 and the neutral is not corroded. In fact, the positives and neutral running underground into and from my home to the transformer were checked and looked good according to several different utility workers. Unfortunately, there is no way to check the wire unground for small breaks in the insulation.
I have noticed that the voltage goes away when I remove the aluminum ladder from water in the deep end. There is no voltage in the water but I still get readings in the metal sleeves holding the ladder and rails in the concrete. One would say that the bonding is broke. When I connect a wire above the ground connecting all metal parts except the pool frame as if it would be underground, it had no effect. A water bond even increased the voltage.
Just recently, I called the utility to again disconnect my home from the transformer. During this incident, there was no change in the voltage of the water until I disconnected the cable and telephone ground from my homes grounding rode. As I disconnected the telephone ground the voltage decreased in half, when I disconnected the cable it went away entirely. I then had the utility reconnect my home without the cable and telephone and the voltage came back slightly. As I connected the cable it increased and when I connected the telephone ground it doubled. I then put the cable and telephone on its own ground but it had no change to the voltage readings. I do measure about 1.5 volts coming off each of my homes electrical, cable, and telephone grounds. The voltage measured off the electrical ground rod is higher when the cable and telephone is connected to the electrical ground.
Although I have been told by many that this problem is a neutral grounding problem on the utility side, they have also said that by creating an equal potential grid around the pool, underneath and connecting the concrete, this should correct this issue.
I hope this answers most of your questions. Any insight would help. My pool appears to have passed all inspections and received all permits when it was built, unfortunately I am the 3rd owner.
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