I had a job like that once, as I was shutting off circuit breakers in the basement, I heard water running. I asked the lady if she was using any water. She said, no. It turned out that her well sprung a leak on the inside of the well casing. The water would pump up from the bottom of the well to the top, leak out, and sink back down to the bottom of the well. It was like that for 2 months. If I didn't hear the water running, it would have been like that for who knows how long?
