SACRAMENTO (CBS13) — In 2017 Sacramento became one of the first cities in the nation to launch 5G high-speed internet service. Now some people say those radio signals are creating health hazards in their homes.

Sacramento Mayor Darrell Steinberg is trying to position the city as a demonstration hub for new technology, but with anything new comes questions about public safety.

As Verizon puts up hundreds of antennas around the city, some parents worry about potential risks.

"I'm losing sleep, we're just concerned about our daughters," Aaron McMahon said.

Aaron and Hannah McMahon have a 5G cell site on a pole right outside their Pocket neighborhood home. They're worried about cancer or other long-term health effects on their six and three-year-old daughters living so close to a transmitter beaming a radio signal 24 hours a day.

"We had a few experts come out and told us we were living in a microwave," Aaron McMahon said.

"It's scary, it's a hard situation to be in," Hannah McMahon said. "They can't tell me that something that's fairly new, and relatively untested, is not gonna be harmful in 10-15 years."

Sacramento was one of the first cities in the nation to get Verizon's 5G high-speed technology. But some say it was done with little debate over putting transmitters in neighborhoods.