Image source does not exist

Real Time Radiation Monitoring for Cities in California

updated as of
rooftop monitor
City Status Details
Anaheim No Danger Levels remain near background and well below concentrations of concern
Bakersfield No Danger Levels remain near background and well below concentrations of concern
Eureka No Danger Levels remain near background and well below concentrations of concern
Fresno No Danger Levels remain near background and well below concentrations of concern
Los Angeles No Danger Levels remain near background and well below concentrations of concern
Riverside No Danger Levels remain near background and well below concentrations of concern
Sacramento No Danger Levels remain near background and well below concentrations of concern
San Diego No Danger Levels remain near background and well below concentrations of concern
San Francisco No Danger Levels remain near background and well below concentrations of concern
San Jose No Danger Levels remain near background and well below concentrations of concern

Note on Radiation Data Charts

The radiation charts linked above present data on beta and gamma radiation in units of counts per minute (cpm), reflecting the rate of decay in a given quantity of radioactive material.

Background radiation levels vary from region to region depending on altitude, amounts of natural radiation in soil and other local factors. Normal background levels of beta radiation range from 25 to 100 cpm, but can be as high as 200 cpm. Normal background gamma radiation fluctuates between 100 and 15,000 cpm, depending largely on the element measured.

An important consideration in interpreting these data is the similarity in radiation levels before and after the Japanese earthquake.