Update: I don't believe it is the lift station. I met with the lift station support guys (who were super helpful), yet they think it is the motor from the fountain on the property behind my house - any thoughts?
I found the question below from “Dean” and I have the exact same problem. No solution was in the thread. Turned off the electric in the entire house, still happening, turned off the water in the entire house, still happening. We are also on ear plugs to sleep, fan running on high, anything to block this noise. It is not the refrigerator. It seems to be more strong near the ceiling, even with the power and water off….any help is appreciated!
From Dean: For the last month, I have a vibrating sound low in volume, but strong enough to hear clearly sounding like a motor or a pump. I turned off the power and also shut off the water, but to no avail...the sound continues. It is so hard to sleep and ear plugs help. I checked in the crawl space and did not hear it. The sound is hard to locate, but may be coming from the garage. I hear the sound in most of the home, but stronger nearer to the garage. Right now late in night, it is really humming. No signs of leaking pipes. I am stumped and so wish to cut that sound out. What to do, who to get (plumber or electrician) and how to find the source of the sound?