SAN FRANCISCO (AP) -- Pacific Gas and Electric Co. is proposing to allow residents to switch off the wireless signals on their utility meters for a fee, but opponents of the devices aren't satisfied.

The Northern California utility company unveiled its proposal Thursday.

The San Francisco Chronicle reports that under PG&E's plan, residents could pay $14 to $20 per month plus an upfront fee to have the signal disabled. The company says the fee would pay for sending meter readers to those homes.

Some residents blame the signals -- similar to those from cell phones and laptops -- for health problems from headaches to insomnia. They say the opt-out doesn't address the presence of smart meters at neighbors' homes and elsewhere.

A state study found that scientists have not discovered any evidence that the signals are harmful.