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Water -- Nitrogen content -- United States

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• Water -- Nitrogen content
• Water -- United States

• Water -- Nitrogen content -- Arkansas
• Water -- Nitrogen content -- Colorado
• Water -- Nitrogen content -- Florida
• Water -- Nitrogen content -- Idaho
• Water -- Nitrogen content -- Kansas
• Water -- Nitrogen content -- Maryland
• Water -- Nitrogen content -- Michigan
• Water -- Nitrogen content -- Minnesota
• Water -- Nitrogen content -- Mississippi
• Water -- Nitrogen content -- Nevada
• Water -- Nitrogen content -- North Carolina
• Water -- Nitrogen content -- Oklahoma
• Water -- Nitrogen content -- Texas
• Water -- Nitrogen content -- Virginia
• Water -- Nitrogen content -- Washington (State)

• Nutrients in ground water and surface water of the United States : an analysis of data through 1992 (U.S. Dept. of the Interior, U.S. Geological Survey :, 1995), by David K. Mueller and Geological Survey (U.S.) (page images at HathiTrust)
• Nonpoint and point sources of nitrogen in major watersheds of the United States : introduction (U.S. Dept. of the Interior, U.S. Geological Survey, 1994), by Larry J Puckett and Geological Survey (U.S.) (page images at HathiTrust)
• Nitrate in ground waters of the United States : assessing the risk (U.S. Geological Survey, 1996), by Bernard T. Nolan, Barbara C. Ruddy, National Water-Quality Assessment Program (U.S.), and Geological Survey (U.S.) (page images at HathiTrust)
• Nonpoint and point sources of nitrogen in major watersheds of the United States (U.S. Geological Survey ;, 1994), by Larry J. Puckett and Geological Survey (U.S.) (page images at HathiTrust)

• Phosphorus and nitrogen concentrations and loads at Illinois River south of Siloam Springs, Arkansas, 1997-1999 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2001), by W. Reed Green, Brian E. Haggard, Geological Survey (U.S.), and Arkansas Soil and Water Conservation Commission (page images at HathiTrust)

• Quality of water in the alluvial aquifer and tributary alluvium of the Fountain Creek Valley, southwestern El Paso County, Colorado, 1991-92 (U.S. Geological Survey :, 1995), by Michael E. Lewis, Colorado Springs Utilities, and Geological Survey (U.S.) (page images at HathiTrust)

• In situ bioremediation of nitrate contaminated ground water (U.S. Dept. of the Interior, U.S. Geological Survey :, 1998), by Peter B. McMahon, Breton W. Bruce, Kevin F. Dennehy, and Geological Survey (U.S.) (page images at HathiTrust)

• Nitrogen, phosphorus, organic carbon, and biochemical oxygen demand in Florida surface waters, 1972 (U.S. Geological Survey, Water Resources Division, 1978), by Matthew I. Kaufman, Joel E. Dysart, United States Department of the Interior, Geological Survey (U.S.). Water Resources Division, Florida. Department of Natural Resources, and Florida. Department of Environmental Regulation (page images at HathiTrust)

• Probability of detecting elevated concentrations of nitrate in ground water in a six-county area of south-central Idaho (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2003), by K. D. Skinner, Mary M. Donato, Geological Survey (U.S.), Jerome County (Idaho), and Idaho. Department of Environmental Quality (page images at HathiTrust)

• Occurrence of phosphorus, nitrate, and suspended solids in streams of the Cheney Reservoir Watershed, south-central Kansas, 1997-2000 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2001), by Chad R. Milligan, Larry M. Pope, and Geological Survey (U.S.) (page images at HathiTrust)

• Water quality in the upper Shoal Creek Basin, southwestern Missouri, 1999-2000 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2001), by John G. Schumacher, Geological Survey (U.S.), United States. Environmental Protection Agency. Region VII., Missouri. Water Pollution Control Program, and Missouri. Division of Environmental Quality (page images at HathiTrust)

• Relation of land use to nitrogen concentration in ground water in the Patuxent River Basin, Maryland (U.S. Dept. of the Interior, U.S. Geological Survey ;, 1995), by E. Randolph McFarland, Geological Survey (U.S.), and Maryland. Department of the Environment (page images at HathiTrust)

• Houghton Lake annual nitrogen and phosphorus budgets (Dept. of Natural Resources, 1973), by Charles H. Pecor, Michigan. Water Resources Commission, Upper Great Lakes Regional Commission (U.S.), and Michigan. Department of Natural Resources (page images at HathiTrust)

• Presence, distribution, and potential sources of nitrate and selected pesticides in the surficial aquifer along the Straight River in north-central Minnesota, 1992-93 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 1995), by J. F. Ruhl, Minnesota Pollution Control Agency, Becker Soil and Water Conservation District (Minn.), Soil and Water Conservation District of Hubbard County, and Geological Survey (U.S.) (page images at HathiTrust)

• Concentrations and loads of nitrogen and phosphorus in the Yazoo River, northwestern Mississippi, 1996-97 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 1998), by Richard H. Coupe, National Water-Quality Assessment Program (U.S.), and Geological Survey (U.S.) (page images at HathiTrust)

• Nitrate and ammonia in shallow ground water, Carson City urban area, Nevada, 1989 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 1996), by Stephen J. Lawrence, National Water-Quality Assessment Program (U.S.), and Geological Survey (U.S.) (page images at HathiTrust)

• Trends in chloride, dissolved solids, and nitrate concentrations in ground water, Carson Valley and Topaz Lake Areas, Douglas County, Nevada, 1959-88 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 1996), by Carl E. Thodal, Geological Survey (U.S.), and Douglas County (Nev.) (page images at HathiTrust)

• Methods for identifying sources of nitrogen contamination of ground water in valleys in Washoe County, Nevada (U.S. Geological Survey ;, 1996), by R. L. Seiler, Washoe County (Nev.). Department of Comprehensive Planning, and Geological Survey (U.S.) (page images at HathiTrust)

• Nitrate nitrogen concentrations in shallow ground water of the coastal plain of the Albemarle-Pamlico Drainage Study Unit, North Carolina and Virginia (U.S. Geological Survey, 1997), by T. B Spruill, A. Elizabeth Morey, Jo Leslie Eimers, and National Water-Quality Assessment Program (U.S.) (page images at HathiTrust)

• Distributions of median nitrite plus nitrate as nitrogen, total nitrogen, and total phosphorus concentrations in Oklahoma streams, 1973-2001 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2003), by Brian E. Haggard, Carol J. Becker, Jason R. Masoner, Geological Survey (U.S.), and Oklahoma Water Resources Board (page images at HathiTrust)

• Water chemistry of Shoal Creek and Waller Creek, Austin, Texas, and potential sources of nitrate (U.S. Dept. of the Interior, U.S. Geological Survey ;, 1996), by Patricia B. Ging, Steven R. Silva, Roger W. Lee, Geological Survey (U.S.), and Austin (Tex.) (page images at HathiTrust)

• Nitrate nitrogen concentrations in shallow ground water of the coastal plain of the Albemarle-Pamlico Drainage Study Unit, North Carolina and Virginia (U.S. Geological Survey, 1997), by T. B Spruill, A. Elizabeth Morey, Jo Leslie Eimers, and National Water-Quality Assessment Program (U.S.) (page images at HathiTrust)

• Estimating the probability of elevated nitrate (NO₂+NO₃-N) concentrations in ground water in the Columbia Basin Ground Water Management Area, Washington (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2000), by Lonna M. Frans, Geological Survey (U.S.), and Columbia Basin Ground Water Management Area (Wash.) (page images at HathiTrust)

Items below (if any) are from related and broader terms.

• Nitrate removal from water at the water-mud interface in wetlands (U.S. Environmental Protection Agency, Office of Research and Development, Corvallis Environmental Research Laboratory, 1976), by W. H. Patrick, Louisiana Agricultural Experiment Station, and United States. Environmental Protection Agency. Office of Research and Development (page images at HathiTrust; US access only)
• Protocol for evaluating the nitrogen status of lake sediments. (For sale by the Supt. of Docs., U.S. Govt. Print. Off., 1974), by Dennis R. Keeney and United States. Environmental Protection Agency. Office of Research and Development (page images at HathiTrust; US access only)
• Effect of reduced industrial pumpage on the migration of dissolved nitrogen in an outwash aquifer at Olean, Cattaraugus County, New York (U.S. Dept. of the Interior, Geological Survey ;, 1987), by Marcel P. Bergeron, Geological Survey (U.S.), and New York (State). Department of Environmental Conservation (page images at HathiTrust)
• Concurrent nitrification-denitrification at the sediment-water interface as a mechanism for nitrogen losses from lakes : technical completion report (University of Wisconsin, Water Resources Center, 1975), by Dennis R. Keeney, Charles Wilkinson, Steven Schmidt, United States. Office of Water Research and Technology, and Madison. Water Resources Center University of Wisconsin (page images at HathiTrust)
• National summary of state water quality standards : nitrates/nitrites/ammonia (The Division, 1980), by Nalesnik Associates, United States. Environmental Protection Agency. Office of Water Regulations and Standards, and United States. Environmental Protection Agency. Office of Water Regulations and Standards. Criteria & Standards Division (page images at HathiTrust)
• Nonpoint source -- stream nutrient level relationships : a nationwide study (Corvallis Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency ;, 1977), by James M. Omernik, Theodore R. McDowell, Corvallis Environmental Research Laboratory. Streams Branch, and Corvallis Environmental Research Laboratory (page images at HathiTrust)
• Nitrogen contamination sources in shallow ground water, Las Vegas area, Nevada (Water Resources Center, Desert Research Institute, University of Nevada System, 1977), by J. W. Hess and Ralph O. Patt (page images at HathiTrust; US access only)
• Characterization of nitrogen sources contaminating shallow ground water in an arid basin, Las Vegas area, Nevada (Water Resources Center, Desert Research Institute, University of Nevada System, 1976), by Ralph O. Patt and J. W. Hess (page images at HathiTrust; US access only)
• A comparison of the methods for the determination of nitrates in water : by the aluminum reduction method, and the phenol sulphuric acid method (1903), by Henry Phelps Jarman (page images at HathiTrust; US access only)
• A contribution to the characterization of Illinois reference/background conditions for setting nitrogen criteria for surface waters in Illinois (Illinois State Water Survey, 2000), by Edward Charles Krug and Illinois Council on Food and Agricultural Research (page images at HathiTrust)
• Lake Erie nutrient control : effectiveness regarding assessment in eastern basin (Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency ;, 1980), by Great Lakes Laboratory, Large Lakes Research Station, and Minn.) Environmental Research Laboratory (Duluth (page images at HathiTrust)
• Nitrogen in ground water and surface water from sewered and unsewered areas, Nassau County, Long Island, New York (U.S. Geological Survey, Water Resources Division, 1980), by Stephen E. Ragone, Nassau County (N.Y.) Department of Public Works, and Geological Survey (U.S.) Water Resources Division (page images at HathiTrust)
• Nitrate-nitrogen concentrations in ground water from three selected areas in Kansas (U.S. Geological Survey, Water Resources Division, 1982), by T. B. Spruill, Geological Survey (U.S.). Water Resources Division, and Kansas. Department of Health and Environment (page images at HathiTrust)
• Nonpoint source, stream nutrient level relationships, a nationwide study. (EPA, 1977), by United States Environmental Protection Agency and Corvallis Environmental Research Laboratory (page images at HathiTrust)
• Estimates of sediment denitrification and its influence on the fate of nitrogen in Chesapeake Bay (Chesapeake Bay Liaison Office, U.S. Environmental Protection Agency, 1987), by Robert Reece Twilley, W. Michael Kemp, and Chesapeake Bay Program (U.S.) (page images at HathiTrust)
• Formation and significance of N-chloro compounds in water supplies (Municipal Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 1980), by J. Carrell Morris and Municipal Environmental Research Laboratory. Drinking Water Research Division (page images at HathiTrust)
• The speciation and reactivity of wastewater-derived organic nitrogen (UC Water Resources Center, 2004), by David L. Sedlak, Elif Pehlivanoglu, and California Water Resources Center (page images at HathiTrust)
• Water nutrients no.2 : study number 36 ; report of a study conducted by Analytical Reference Service. (U.S. Public Health Service, Environmental Health Service, 1970), by Raymond J. Lishka and National Center for Urban and Industrial Health (U.S.). Training Program. Analytical Reference Service (page images at HathiTrust)
• Nitrogen removal in cold regions trickling filter systems (U.S. Army Cold Regions Research and Engineering Laboratory, 1986), by Sherwood C. Reed, C. J. Diener, Weyrick P. Butler, and Cold Regions Research and Engineering Laboratory (U.S.) (page images at HathiTrust)
• Packed-bed reactors for nitrification and denitrification of secondary effluents : completion report (Iowa State Water Resources Research Institute, Iowa State University], 1976), by James C. Young (page images at HathiTrust)
• Distribution of nitrate and related nitrogen species in the unsaturated zone, Redlands and vicinity, San Bernardino County, California (U.S. Geological Survey, Water Resources Division, 1979), by John M. Klein, Wesley L. Bradford, and San Bernardino Valley Municipal Water District (Calif.) (page images at HathiTrust)
• The dilution/flushing technique in lake restoration (Corvallis, Oregon : Corvallis Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 1981., 1981), by E. B. Welch, Corvallis Environmental Research Laboratory. Freshwater Division, United States. Environmental Protection Agency. Office of Research and Development, and United States. Environmental Protection Agency. Office of Water Regulations and Standards. Criteria & Standards Division (page images at HathiTrust)
• Nitrogen, phosphorus, organic carbon, and biochemical oxygen demand in Florida surface waters, 1972 (U.S. Geological Survey, Water Resources Division, 1978), by Matthew I. Kaufman, Joel E. Dysart, United States Department of the Interior, Geological Survey (U.S.). Water Resources Division, Florida. Department of Natural Resources, and Florida. Department of Environmental Regulation (page images at HathiTrust)

• Evaluation of alkaline persulfate digestion as an alternative to Kjeldahl digestion for determination of total and dissolved nitrogen and phosphorus in water (U.S. Dept. of the Interior, U.S. Geological Survey :, 2003), by Charles J. Patton, Jennifer R. Kryskalla, and Geological Survey (U.S.) (page images at HathiTrust)

• Ground-water discharge and base-flow nitrate loads of nontidal streams, and their relation to a hydrogeomorphic classification of the Chesapeake Bay watershed, Middle Atlantic coast (U.S. Dept. of the Interior, U.S. Geological Survey ;, 1998), by L. Joseph Bachman and Geological Survey (U.S.) (page images at HathiTrust)

• Data-collection methods, quality-assurance data, and site considerations for total dissolved gas monitoring, lower Columbia River, Oregon and Washington, 2000 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2001), by Dwight Q. Tanner, Matthew W. Johnston, Geological Survey (U.S.), and United States Army Corps of Engineers (page images at HathiTrust)

• Depressurization and two-phase flow of water containing high levels of dissolved nitrogen gas. (National Aeronautics and Space Administration, Scientific and Technical Information Branch;, 1981), by Robert J. Simoneau, Lewis Research Center, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch (page images at HathiTrust)

• Phosphorus and nitrogen concentrations and loads at Illinois River south of Siloam Springs, Arkansas, 1997-1999 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2001), by W. Reed Green, Brian E. Haggard, Geological Survey (U.S.), and Arkansas Soil and Water Conservation Commission (page images at HathiTrust)

More items available under broader and related terms at left.