(Nebraska News Connection) As more Nebraska towns approve permits for "crypto mines," the high-speed computer facilities processing cryptocurrency algorithms, people in the small North Carolina town of Murphy have a cautionary tale to share.

Murphy residents have found, in addition to consuming massive amounts of energy, the noise levels of crypto mining pose a risk to people's well-being.

It is from the fans required to cool the computers 24 hours a day.

Lynell Morris, a Murphy resident and citizen advocate, said one person who lives near the facility measures noise levels between 55 and 85 decibels, day and night, which is comparable to having a leaf blower 50 feet away, running nonstop.

Morris stated the impact on people's health is unmistakable.

"Anxiety. They can't sleep; they're exhausted because of this noise, that is relentless," Morris explained. "You can imagine a semi-truck sitting right outside your home, right by your bedroom window, and it's just running all night long."

Morris added some residents who moved there for the area's peace and beauty now have houses that have lost value and cannot afford to relocate. She encouraged Nebraskans concerned about crypto mines to find out what kinds of noise ordinances their communities have, and to keep track of building permits and rezoning requests.

Morris noted when the Murphy mine moved in, the permitting process was not exactly transparent.

"They went and got a permit for cement pads and a fence, and then lighting," Morris recounted. "Their description was 'mobile data units.' Well, that could mean a lot of things."

Lisa Sorg, environmental investigative journalist for North Carolina Policy Watch, also encouraged tracking rezoning requests, such as from agricultural to light industrial. She added a number of issues related to "siting" must be scrutinized.

"Who owns the land; who lives nearby? Is it near a waterway? Is it in a flood plain? Is it near a school? Is it in an environmental justice neighborhood? Who wins and who loses?" Sorg outlined.

Some Murphy residents have started a class-action lawsuit against their local crypto mine. The town's Board of Commissioners is encouraging federal legislation to "ban and/or regulate crypto mining" nationwide.