National Stream Quality Accounting Network (NASQAN)
Homepage for description of the National Stream Quality Network (NASQAN),a long-term program monitoring the concentrations and flux of sediment and chemicals in the Nations largest rivers (Mississippi, Columbia, Colorado, Rio Grande, and Yukon).
(Score: 1.380)
National Water Quality Laboratory
The National Water Quality Laboratory (NWQL) is a full-service laboratory that specializes in environmental analytical chemistry and has a primary role to develop new analytical methods. Links to directory, publications, and standards.
(Score: 1.380)
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)
Toxic Substances Hydrology Program
Homepage for the Toxic Substances Hydrology Program which provides scientific information on contaminated sites and on human and envionmental health. Links to news, topical information, investigations, meetings, publications, and photos.
(Score: 1.380)
Water-quality data for the Nation
Homepage for USGS water-quality information. The NWISWeb discrete sample data base is a compilation of over 3.5 million historical water quality analyses in the USGS district data bases. Also includes access to real-time data and a tutorial.
(Score: 1.380)
Reston Chlorofluorocarbon Laboratory
Site on the Chlorofluorocarbon Laboratory and its analytical services for CFCs, sulfur hexafluoride, dissolved gases including nitrogen, argon, methane, carbon dioxide, oxygen, and helium, and tritium/helium-3 dating.
(Score: 1.000)
Water resources of Missouri
Water District homepage with links to detailed real-time and long term water resources data for Missouri on streamflow, ground and surface water, and water quality.
(Score: 0.931)
Water resources of Maryland, Delaware, and Washington, D.C.
USGS water resources home page with links to detailed hydrologic information for Maryland, Delaware, and District of Columbia on ground and surface water, water quality, real-time records, news releases, local weather, and reservoir levels.
(Score: 0.819)
Agricultural chemicals
Overview of the Toxic Substances Hydrology Program role in investigating the occurrence and fate of agricultural chemicals with links to investigations, headlines, on-line fact sheets, new publications, bibliographies and photo gallery.
(Score: 0.690)
Arsenic in ground water of the United States
Information on arsenic in United States ground water largely as a result of minerals dissolving from weathered rocks and soils. Includes links to publications, data, maps, and links to other sites with information on arsenic.
(Score: 0.690)
Midcontinent Agricultural Chemical Research Program
Homepage for the research on occurrence, movement, flux, fate, and effects of agricultural chemicals, such as pesticides, in 25 states by the Midcontinent Agricultural Chemical Research Project (MACRP) with links to study results and publications.
(Score: 0.690)
National assessment of mercury in aquatic ecosystems
Overview of three research programs including determining levels of mercury at selected sites in water, sediment and fish, mercury emissions into the atmosphere, and mercury cycling in the Everglades National Park, Florida.
(Score: 0.690)
Water-quality information - Data
Links to major databases on USGS real-time and historic time period data for water quality, atmospheric deposition, streamflow,and suspended sediments and links to related databases of other agencies.
(Score: 0.690)
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