Map of land use in Contra Costa County

Three views of Contra Costa County
and environs: land use (main map);
red-legged frog habitat (bottom left); regional ozone pollution (bottom right).

Source: 2000 U.S. Census of Population and Housing (county and city boundaries); U.S. Census TIGER files (highways); California Air Resources Board (ozone); California Gap Analysis Project (red-legged frog habitat)