USGS - science for a changing world

Environmental Health - Toxic Substances

Crosscutting Topics

Methods

Field and laboratory environmental measurement methods

The U.S. Geological Survey (USGS) Toxic Substances Hydrology Program develops field methods to measure a wide range of environmental properties, and develops approaches and protocols used to assess or characterize contamination.

The Program also develops laboratory analytical methods to measure a wide variety of chemicals in environmental media.

A scanning electron microscope photograph of individual algae cells that form biofilms on rocks in some mining impacted streams. Biofilms are typically composed of several types of algae along with microscopic bacteria and fungi. When exposed to light, zinc is absorbed to the surface of the algae cells. Used with permission from Dr. Jeffrey M. Morris, Western Research Institute
A scanning electron microscope photograph of individual algae cells that form biofilms on rocks in some mining impacted streams. Biofilms are typically composed of several types of algae along with microscopic bacteria and fungi. When exposed to light, zinc is absorbed to the surface of the algae cells. Used with permission from Dr. Jeffrey M. Morris, Western Research Institute -- from the Diurnal Metal Variations Photo Gallery

Bibliography

Back To Crosscutting Topics Page

USGS Home Water Climate Change Science Systems Ecosystems Energy and Minerals Environmental Health Hazards

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://toxics.usgs.gov/topics/measurements.html
Page Contact Information:
Page Last Modified: Tuesday, 06-May-2014 14:37:03 EDT