Iowa Public Television


Pesticide Levels in U.S. Rivers and Streams

posted on March 10, 2006

A study released this week said pesticides were found in almost all U.S. rivers and streams between 1992 and 2001. The report, by the U.S. Geological Survey, said the chemicals were seldom found at concentrations likely to affect humans, but they were found in most fish.

The USGS looked for 100 pesticides and 40 of them had a widespread presence in streams and sediment in both urban and rural areas. The most frequently detected chemicals found in agricultural streams were atrazine, metolachlor and cyanazine.

The report is based on an analysis of data from 51 major river basins and aquifer systems nationally.

Tags: agriculture news pesticides pollution rivers water water quality