Contamination and Pollution - 25 of 27
Contamination and Pollution FAQs - 27 Found
Mercury contamination is widespread. Mercury was detected in all fish sampled from 291 streams across the U.S. Concentrations in about a quarter of the fish sampled exceeded the criterion for the protection of humans who consume average amounts of fish, established by the U.S. Environmental Protection Agency (0.3 parts per million, wet weight).
To learn about the major findings of this USGS study go to Mercury in Stream Ecosystems
The NAWQA Program is studying mercury cycling in watersheds across the Nation to build an understanding of how natural features and human activities affect the transformation, transport, and bioaccumulation of mercury in stream ecosystems. As of August 2008, mercury was the second leading cause of stream impairment throughout the Nation.