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Water quality
The chemical, physical, and biological characteristics of water, usually in respect to its suitability for a particular purpose.
Subtopics:
Groundwater quality (80 items)
Marine water quality (14 items)
Surface water quality (66 items)

Water-quality data (83 items)
Related topics:


Results 11 - 20 of 341 listed by similarity [list alphabetically]
Pharmaceuticals, Hormones, and Other Organic Wastewater Contaminants in U.S. Streams [More info]
Describes and illustrates that a broad range of chemicals found in residential, industrial, and agricultural wastewaters commonly occur in mixtures at low concentrations downstream from areas of intense urbanization and animal production.
USGS mine drainage activities [More info]
Listing of USGS research and monitoring projects on mine drainage, in order to promote cooperation and collaboration among scientists working on problems related to mining and the environment.
Parking-lot sealcoat: A major source of PAHs in urban and suburban environments [More info]
Explanation of chemical contaminants released into aquatic environments by popular sealcoating compounds used in parking lots, with frequently-asked questions, links, and contact information.
National analysis of trace elements in ground water, streams, stream and reservoir sediment, and fish and clam tissue across the United States [More info]
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.
Acute toxicity database [More info]
The following database summarizes the results from aquatic acute toxicity tests conducted by the USGS CERC located in Columbia, Missouri.
BRASS: Bedrock Regional Aquifer Systematics Study [More info]
Description of the project to publish new bedrock geologic maps in the United States to advance the understanding of the region's bedrock aquifers. Includes list of projects.
Pesticide National Synthesis Project: national assessment of pesticides in streams, rivers, and ground water of the United States [More info]
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.
National assessment of volatile organic chemicals (VOCs) in water resources of the United States [More info]
Links to online data retrieval, information on MTBE and gasoline oxygenates, VOCs analysis, VOC publications, news features, and featured online publications.
Nutrients National Synthesis Project: nutrients in rivers, streams, and aquifers in the United States [More info]
This Nutrients National Synthesis Project site on the U.S. study of nutrients, especially nitrogen and phosphorus, as contaminants in high concentrations links to an overview, study team, featured reports, publications, and national datasets.
Water quality of San Francisco Bay [More info]
Thirty year database of water-quality data, visual data displays, and project information on the San Francisco Bay directed towards following and understanding changes in the water quality of San Francisco Bay.
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