Does rainwater have oil in

Rain water that falls from the sky should not have oil in it, unless the sky is polluted. However, the rain water that lands in a barrel, or some other container, could have oil in it, because the ground is contaminated with oil, or the barrel (container) has oil in it. Most rain water that falls from the sky is clean, but, when it lands, it can get polluted with oil. Acid raid is another problem with rain water, which occurs again because the sky overhead is polluted.