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Welcome to the State of California 

Radiologic Health Branch 

Environmental Radiation Monitoring

Pursuant to California Health and Safety Code section 114755, RHB conducts routine monitoring of radioactive materials in the environment, including radioactive materials in media such as air, milk, food, and water in locations and certain frequencies. Below are the results of that monitoring for the years 2011 through 2013.

RHB has responded to numerous requests surrounding the safety of California residents from past and current incidents at the Fukushima nuclear power plants in Japan. Information from Federal agencies, State programs, as well as RHB’s own sampling results, conclude there are no health and safety concerns to California residents.  Click here for initial monitoring results regarding incident.

RHB also recently responded to reports of elevated radioactivity readings on California’s beaches in the vicinity of Half Moon Bay. Preliminary data indicates the elevated radioactivity is due to naturally occurring radioactive materials (NORM), not Fukushima related activities. The NORM on the beaches is not causing an impact to public health. A final investigation report will be posted on its website within the next few weeks.

In addition to increasing the monitoring frequency, the RHB has joined Alaska, Washington and Oregon in improving monitoring efforts in coordination with the federal Environmental Protection Agency (EPA) and the Food and Drug Administration (FDA). 

As future results become available they will be posted below.

Last modified on: 8/31/2016 11:12 AM