Here are some USGS Web pages with more information on natural contaminants and Anywhere:
National Water-Quality Assessment data warehouse
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, stream flow, and ground water levels from national study units.
(Score: 1.380)
Water quality information pages
Homepage of the Office of Water Quality programs on the quality of the Nations surface-water and ground-water resources, with links to general information, quality assurance, software, data, publications, USGS facilities, techniques, and programs.
(Score: 1.380)
Health effects of mineral dusts
Overview of project to develop and apply a variety of earth science methods to interpet the geologic links between mineral dusts such as silica and asbestos and human health problems with links to contacts, tasks, and products.
(Score: 1.000)
Contaminant Biology Program
The Contaminant Biology Program investigates contaminant exposure and effects on fish, wildlife, and other organisms, their habitat and ecosystems. Links include description of projects, research centers, and news.
(Score: 0.690)
Environment
Links to USGS activities in the environment theme area, including anthropogenic and natural contaminants, ecosystems, energy, human health, global change, etc. Also includes links to environment-related factsheets.
(Score: 0.690)
Natural oil and gas seeps in California
Web site about natural oil and gas seeps in California: how oil and gas seeps form, where they occur, and how they affect the environment; the relationship between oil seeps and underground oil fields; the La Brea Tar Pits, a world-famous oil seep in LA.
(Score: 0.522)
Water resources of Michigan - protection of drinking water sources
Links to descriptions, publications, and photos of research projects in Michigan related to drinking water including source assessment, ground-water availability, water resources, and contaminants in water.
(Score: 0.491)
The USGS role in Total Maximum Daily Load (TMDL) assessments
Detailed information on Total Maximum Daily Load, the total quantity of a pollutant that a stream can carry and still conform to water quality standards, used as a measurement in the monitoring, assessment, and remediation of polluted waters.
(Score: 0.346)
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