The following mapping tool was produced by the Columbia Basin Toxics Workgroup with funding from the Northwest Power and Conservation Council's Fish and Wildlife Division. The map displays information on one group of toxic contaminants, Polycyclic Aromatic Hydrocarbons (PAHs), based on data collected from various monitoring sources. The map does not purport to be comprehensive, as monitoring is not uniform throughout the Basin. The map has been developed as part of the effort to address measures identified in the Water Quality Strategy of the Council's Fish and Wildlife Program.