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Contamination and pollution
Introduction of harmful substances into the environment by human action or natural processes.
Subtopics:
Nonpoint-source pollution (3 items)
Industrial pollution (5 items)
Pesticide and herbicide contamination (12 items)
Toxic radionuclide contamination (3 items)
Toxic trace element contamination (15 items)
Pharmaceutical contamination (2 items)

Water pollution (9 items)
Soil pollution (1 items)
Air pollution (6 items)
Related topics:
Results 21 - 30 of 108 listed by similarity [list alphabetically]
National Water-Quality Assessment data warehouse [New Window]
Data warehouse for national water quality program with links to chemical, biological, and physical data for water, sediment and animal tissues, nutrient, pesticide, and VOC levels, streamflow, and ground water levels from national study units.
National analysis of trace elements in ground water, streams, stream and reservoir sediment, and fish and clam tissue across the United States [New Window]
Trace elements are inorganic chemicals occurring in small amounts in nature. This web site of the National Water Quality Assessment links to U.S. data, publications, news, and other sites on trace metals, metalloids and radionuclides in water.
National assessment of volatile organic chemicals (VOCs) in water resources of the United States [New Window]
Links to online data retrieval, information on MTBE and gasoline oxygenates, VOCs analysis, VOC publications, news features, and featured online publications.
National field manual for the collection of water-quality data [New Window]
Field manual (also available in PDF and paper formats) with instructions on techniques to collect and process water samples and to perform measurements of temperature, oxygen content, conductance, pH, turbidity, and fecal contaminants.
National highway runoff water quality data and methodology synthesis [New Window]
Cooperative national project with the Federal Highway Administration (FHWA) to evaluate FHWA's guidelines for highway-runoff quality. Links to searchable online bibliography of related publications by the USGS, EPA, FHWA, and state agencies.
Natural oil and gas seeps in California [New Window]
Distribution and characteristics of natural oil and gas seeps in California, including processes of formation and effects on the environment; with discussion of tar pits and asphaltum.
Occurrence of selected radionuclides in ground water used for drinking water in the United States [New Window]
Results (*.pdf) of a 1998 targeted reconnaissance survey on the sources of radium, polonium, and lead radionuclides, data collection and laboratory methods, existing occurrences in drinking water, risk assessments, and compliance monitoring.
Ozone in our air - friend or foe? - depends on where [New Window]
Article on ozone layer and ozone as a pollutant from the weekly newsletter Volcano Watch (Hawaiian Volcano Observatory) for August 20, 2001.
Pesticide National Synthesis Project: national assessment of pesticides in streams, rivers, and ground water of the United States [New Window]
Homepage for the Pesticide National Synthesis Project, an assessment of pesticides in national water resources, with links to national reports, national statistics, national data, pesticide use, analytical strategy, and standards for the U.S.
Studies in Long Island Sound: geology, contaminants, and environmental issues [New Window]
Description of Long Island Sound projects and links to research topics, data, publications, photos, and technology on sediment transport, sea floor mapping, contaminant sampling, sediment texture, and environmental issues.
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