I've got a problem with the grounding in my neighborhood, and I need some help in getting the right solution.
I noticed high EMF throughout much of my house, even with all appliances turned off. I shut off all power to the house at the main breaker, and there was no improvement in the situation. I found that even with the main breaker shut off, a clamp-on ammeter always registers a current going through my water supply. I've followed this for about a week now. I'm typically seeing around 3 Amps, although sometimes it's lower, and at other times it's significantly higher.
I began to suspect that this is not just a problem with my house. I found the same situation in my next-door neighbor's basement. I measured 7 amps on their water main yesterday, and came back and immediately found 12 amps on my own water main. However, other houses on the same block, on the opposite side of the neighborhood transformer and on the opposite side of the street do not seem to have this problem.
I repeated the test for the power company today, and showed the current on the water main, despite the main breaker being off. They checked for an open neutral, but said they couldn't detect one on the house, and then seemed to brush off the question of the current through the water main. They're going to install a meter to detect voltage fluctuations on the line, but I'm not sure if this is the right path. If neutral is perfectly stable, but is occurring through the water main instead of their neutral, then why would it fluctuate? If I can, I'd like to direct them to a check that will show the problem.
What can I do to make sure the power company performs the right diagnosis? I believe the current on the water main represents a shock hazard, in addition to causing high EMF via a net current on my water pipes.