Shaking My Head Productions Gepubliceerd op 24 jan. 2018 California Warns About Cellphone Exposure And Health Risks Dec 16, 2017 @ 10:37 AM | Alice G. Walton , Contributor The connection between cell phone radiation and health risks is far from settled—but it’s strong enough that the California Department of Public Health (CDPH) has issued guidelines on how to minimize one’s exposure.