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Contamination and pollution
Introduction of harmful substances into the environment by human action or natural processes.
Subtopics:
Nonpoint-source pollution (11 items)
Industrial pollution (25 items)
Pesticide and herbicide contamination (24 items)
Toxic radionuclide contamination (12 items)
Toxic trace element contamination (40 items)
Pharmaceutical contamination (3 items)

Water pollution (13 items)
Soil pollution (1 items)
Air pollution (7 items)
Related topics:
Results 81 - 90 of 182 listed alphabetically [list by similarity]
Gulf of the Farallones disposal issues: disposal and waste disposal [More info]
Study of the effects on the Gulf of the Farallones National Marine Sanctuary resulting from the disposal of San Francisco dredged material and barrels of low-level radioactive waste with links to publications and atlas with digital images.
Health effects of mineral dusts [More info]
Overview of project to develop and apply a variety of earth science methods to interpret the geologic links between mineral dusts such as silica and asbestos and human health problems with links to contacts, tasks, and products.
Household Chemicals and Drugs Found in Biosolids from Wastewater Treatment Plants [More info]
Research findings and examples of application to real problems--biosolids have high concentrations of household contaminants compared to treated liquid wastewater effluent.
Human Health Database [More info]
Central site providing links to USGS databases and homepages providing significant data and information on research related to human health.
Hydrology of Johnson Creek Basin, a Mixed-Use Drainage Basin in the Portland, Oregon, Metropolitan Area [More info]
Study of a small stream that has had a history of persistent flooding and water-quality problems.
Hypoxia [More info]
A brief definition and explanation of hypoxia with special reference to the Gulf of Mexico hypoxic zone along the Louisiana-Texas coast as well as extensive links to USGS and other related information resources.
Hypoxia in the Gulf of Mexico and related USGS activities [More info]
Information about the causes and impact of hypoxia with links to USGS and other Federal agency information and activities related to nutrients in the Mississippi River Basin and hypoxia in the Gulf of Mexico.
PDF Integrated geologic, geochemical, and geophysical studies of Big Bend National Park, Texas [More info]
Coordinated studies of the effect of historical mining for mercury, origin and composition of metals in groundwaters and surface waters, history of volcanic and intrusive activity, and the complex geological history of this area.
PDF Investigating atmospheric mercury with the U.S. Geological Survey mobile mercury laboratory [More info]
Explains sources of mercury in the air, ways in which mercury is concentrated in animals, and describes how we measure deposition of atmospheric mercury, with summaries of observations.
Kentucky District - program highlights [More info]
Brief descriptions of research programs in water resources in Kentucky with a few links to program websites. Programs include data collection projects, acid mine drainage, hydrodynamics, geology, waste site cleanup and hydrogeology.
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