Radiation?

Well, I live near the coast of Southern California. My community garden plot is about 3 miles from the beach. There was some rain today and my garden enjoyed it. Who knows how much radiation is in our food anyway? Am I worried? Yes...I have two little girls who eat all the herbs right out of the garden without the occasional rinse. Anyway, my youngest ate the cilantro right off the bat as she walked into the plot and I didn't stop her. This is life as we know it.