UC Berkeley Nuclear Engineering Air Monitoring Station available here
Preliminary results show trace amounts of radioactive iodine (I131, I132), cesium (Cs137, Cs134), and tellurium (Te132) which are not naturally occurring elements and are assumed to originate from the Fukushima nuclear site. In context, we also see Be-7 (cosmogenically produced) and Pb-212 (radon daughter) which are naturally occurring isotopes that also show up normally in rain water. Preliminary analysis show levels remain well below that which would cause health effects. We are currently awaiting better calibration of our detector system to publish amounts.