This United States Geological Survey (USGS) program addresses water quality in the US. The goal is to develop long-term consistent and comparable information on streams, ground water, and aquatic ecosystems to support sound management and policy decisions. The program assesses over 50 river basins and aquifer systems, and helps to inform decision makers about the state of US water resources. Issues addressed include how and why water quality varies across the nation, trace elements, pesticides, nutrients, volatile organic chemicals (VOC's), water protection and management, and human health. This site links the user to articles, maps, data sets, and other sources of information. A glossary defines over 150 water related terms.
This site provides information on both floral and faunal species found in aquatic areas in the United States. It explains what a nonindigenous species is and how the presence of these species may affect the health of natural ecosystems. Users may search the site for specific non-native species by selecting from a list of organisms, then specifying a drainage or region. The quantity and quality of information provided for a species varies depending on the amount of research attention focused on that individual species or type of organism. The home page of this site offers links to recent news and reports regarding the status or discovery of nonindigenous species.
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