For Cu and Pb there was a significant correlation between concentrations in milfoil and barley plants and the rate of aerial deposition, while metal concentrations in plants and soils were unrelated. Nickel and Cd concentrations in plants were correlated with the rate of aerial deposition and soil concentrations. A. millefolium and H. vulgare thus can be used to monitor aerial deposition of Cu and Pb, but their use to monitor Ni and Cd requires that chemical properties of the soil are constant throughout the monitored area. -from Authors