By Neil M. Dubrovsky, Charles R. Kratzer, Larry R. Brown, JoAnn M. Gronberg, and Karen R. Burow
A contribution of the National Water-Quality Assessment (NAWQA) Program
The use of firm, trade, and brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Government.
In-text links to figures generally point to the figure caption, below the actual figure.