Watershed- and Regional-Scale Contamination
The Toxics Program conducts watershed- and regional-scale investigations of legacy, current, and emerging contaminants
affecting aquatic ecosystems from common types of nonpoint and distributed point-source contamination. More about watershed- and regional-scale contamination investigations
Complete listing of watershed and regional scale investigations and projects >>
Other Watershed- and Regional-Scale Investigations
Watershed- and Regional-Scale Contamination Information
- Index of Bibliographies from Point-Source Investigations
- Index of Photo Galleries for Watershed- and Regional-Scale Contamination Investigations
- Crosscutting Topics Related to Watershed- and Regional-Scale Contamination
- Selected Fact Sheets on Watershed- and Regional-Scale Contamination
- USGS Toxic Substances Hydrology Program, 2010: USGS Fact Sheet 2010-3011
- Water quality in the Blue River Basin, Kansas City metropolitan area, Missouri and Kansas, July 1998 to October 2004: USGS Fact Sheet 2006-3103.
- Wastewater chemicals in Colorado's streams and ground water: USGS Fact Sheet 2004-3127.
- Trends in the water budget of the Mississippi River basin, 1949-1997: USGS Fact Sheet 2005-3020.
- Is septic waste affecting drinking water from shallow domestic wells along the Platte River in eastern Nebraska?: USGS Fact Sheet 072-03.
- Linking selenium sources to ecosystems--San Francisco Bay-Delta model: USGS Fact Sheet 2004-3091.
- Water quality of the Boulder Creek watershed, Colorado: USGS Fact Sheet 043-03.
- Mercury in stream ecosystems--New studies initiated by the U.S. Geological Survey: USGS Fact Sheet 016-03.
- Occurrence of antibiotics in water from fish hatcheries: USGS Fact Sheet 120-02.
- Glacial ice cores reveal a record of natural and anthropogenic atmospheric mercury deposition for the last 270 years: USGS Fact Sheet FS-051-02.
- Pharmaceuticals, hormones, and other organic wastewater contaminants in U.S. streams: USGS Fact Sheet FS-027-02.
- Malformed frogs in Minnesota--An update: USGS Fact Sheet FS-043-01.
- Nitrogen in the Mississippi Basin--Estimating sources and predicting flux to the Gulf of Mexico: USGS Fact Sheet 135-00.
- Mercury contamination from historic gold mining in California: USGS Fact Sheet FS-061-00.
- Discharge of herbicides from the Mississippi River Basin to the Gulf of Mexico, 1991-97: USGS Fact Sheet FS-163-98.
- Occurrence of cotton pesticides in surface water of the Mississippi Embayment: USGS Fact Sheet FS-022-98.
- Herbicides in rain fall across the Midwestern and Northeastern United States, 1990-91: USGS Fact Sheet FS-181-97.
- Herbicides in Midwestern reservoir outflows, 1992-93: USGS Fact Sheet FS-134-98.
- Herbicides in ground water of the Midwest--A regional study of shallow aquifers, 1991-94: USGS Fact Sheet FS-076-98.
- A reconnaissance for sulfonylurea herbicides in waters of the Midwestern USA: An example of collaboration between the public and private sectors: USGS Fact Sheet FS-046-98.
- Methods to identify areas susceptible to irrigation-induced selenium contamination in the Western United States: USGS Fact Sheet FS-O38-97.
- Source characterization of disinfection byproduct precursors in two Arkansas water-supply reservoirs: USGS Fact Sheet 118-97.
- Agricultural chemicals in Iowa's ground water, 1982-95 -- What are the trends: USGS Fact Sheet FS-116-97.
- Are walleye from Lake Roosevelt contaminated with mercury?: USGS Fact Sheet FS-102-97.
- Vulnerability of public drinking water supplies in New Jersey to pesticides: USGS Fact Sheet FS-165-96.
- Using Geochemical and Statistical Tools to Identify Irrigated Areas that Might Contain High Selenium Concentrations in Surface Water: USGS Fact Sheet FS-O77-96.
- Mercury Contamination of Aquatic Ecosystems: USGS Fact Sheet FS-216-95.
Meetings and Conferences
- USGS cosponsors the special session Nutrient Sources and Cycling in Aquatic Systems at the 2009 AGU Fall Meeting, San Francisco, California, December 14-18, 2009
- USGS cosponsors the special session Fate and Behavior of Pharmaceuticals in Treated Wastewaters, Sludge and River Waters at the SETAC 30th Annual Meeting, New Orleans, Louisiana, November 19-23, 2009
- The USGS sponsored the special session Endocrine Disrupting Chemicals--Analytical Methods and Environment Processes at the SETAC 30th Annual Meeting, New Orleans, Louisiana, November 19-23, 2009
- USGS and Montana Tech of the University of Montana co-sponsor the Special Session Diurnal Biogeochemical Processes in Rivers, Lakes, and Shallow Groundwater at the 2009 GSA Annual Meeting, Portland, Oregon, October 18-21, 2009
- USGS science featured at the AAAS symposium San Francisco Bay: Tracking and Understanding a Changing Estuary, San Francisco, California, August 17, 2009
- Bioavailability and bioaccumulation of metal based engineered nanomaterials (Me-ENMs) in aquatic environments--Concepts and processes (Chapter 5): Luoma, S.N., Khan, F., and Croteau, M.-N., in Lead, J., and Valsami-Jones, E., eds., Nanoscience and the Environment, Elsevier, ISBN:9780080994086 (IN PRESS).
- Effects and quantification of acid runoff from sulfide-bearing rock deposited during construction of highway E18, Norway: Hindar, A., and Nordstrom, D.K., Applied Geochemistry (IN PRESS).
- Experimental studies to characterize uranium sequestration during biostimulated reduction and in response to the return of oxic conditions in shallow aquifers: Fuller, C.C., Johnson, K.J., Akstin, K.C., Singer, D.M., Yabusaki, S.B., Fang, Y., and Fuhrmann, M., U.S. Nuclear Regulatory Commission NUREG/CR-7178 (IN PRESS).
- Diel cycling of trace elements in streams draining mineralized areas--A review: Gammons, C.H., Nimick, D.A., and Parker, S.R., Applied Geochemistry, doi:10.1016/j.apgeochem.2014.05.008 (IN PRESS).
- Biogeochemical aspects of uranium mineralization, mining, milling, and remediation: Campbell, K.M., Gallegos, T.J., and Landa, E.R., in Environmental Geochemistry for Modern Mining--Reviews in Economic Geology, Society of Economic Geologists (SEG) (IN PRESS).
- Conceptual model for Potamocorbula amurensis: Thompson, J.K., and Parchaso, F., in Delta Regional Ecosystem Restoration Implementation Plan (DRERIP) Conceptual Models: Sacramento, Calif., California Department of Fish and Wildlife, Ecosystem Restoration Program (IN PRESS).
- Analysis of pharmaceutical and other wastewater compounds in filtered and unfiltered water samples by gas chromatography/mass spectrometry: Zaugg, S.D., Phillips, P.J., and Smith, S.G., U.S. Geological Survey 2013-1297, 24 p (IN PRESS).
- Land use patterns, ecoregion, and microcystin relationships in U.S. lakes and reservoirs--A preliminary evaluation: Beaver, J.R., Manis, E.E., Loftin, K.A., Graham, J.L., Pollard, A.I., and Mitchell, R.M., 2014, Harmful Algae, v. 36, p. 57-62, doi:10.1016/j.hal.2014.03.005.
- Persistent organic contaminants in Saharan dust air masses in West africa, Cape Verde and the eastern Caribbean: Garrison, V.H., Majewski, M.S., Foreman, W.T., Genualdi, S.A., Mohammed, A., and Massey Simonich, S.L., 2014, Science of the Total Environment, v. 468–469, p. 530-543, doi:10.1016/j.scitotenv.2013.08.076.
- Experimental additions of aluminum sulfate and ammonium nitrate to in situ mesocosms to reduce cyanobacterial biovolume and microcystin concentration: Harris, T.D., Wilhelm, F.M., Graham, J.L., and Loftin, K.A., 2014, Lake and Reservoir Management, v. 30, no. 1, p. 84-93, doi:10.1080/10402381.2013.876132.
- Presence of the Corexit component dioctyl sodium sulfosuccinate in Gulf of Mexico waters after the 2010 Deepwater Horizon oil spill: Gray, J.L., Kanagy, L.K., Furlong, E.T., Kanagy, C.J., McCoy, J.W., Mason, A., and Lauenstein, G., 2014, Chemosphere, v. 95, p. 124-130, doi:10.1016/j.chemosphere.2013.08.049.
- Assessment of endocrine-disrupting chemicals attenuation in a coastal Plain stream prior to wastewater treatment plant closure: Bradley, P.M., and Journey, C.A., 2014, Journal of the American Water Resources Association, v. 50, no. 2, p. 388-400, doi:10.1111/jawr.12165.
- Experimental manipulation of TN--TP ratios suppress cyanobacterial biovolume and microcystin concentration in large-scale in situ mesocosms: Harris, T.D., Wilhelm, F.M., Graham, J.L., and Loftin, K.A., 2014, Lake and Reservoir Management, v. 30, no. 1, p. 72-83, doi:10.1080/10402381.2013.876131.
- Sampling trace organic compounds in water--A comparison of a continuous active sampler to continuous passive and discrete sampling methods: Coes, A.L., Paretti, N.V., Foreman, W.T., Iverson, J.L., and Alvarez, D.A., 2014, Science of the Total Environment, v. 473–474, p. 731-741, doi:10.1016/j.scitotenv.2013.12.082.
- Transgenic zebrafish reveal tissue-specific differences in estrogen signaling in response to environmental water samples: Gorelick, D.A., Iwanowicz, L.R., Hung, A.L., Blazer, V.S., and Halpern, M.E., 2014, Environmental Health Perspectives, v. 122, no. 4, p. 356-362, doi:10.1289/ehp.1307329.
- Identifying non-point sources of endocrine active compounds and their biological impacts in freshwater lakes: Baker, B.H., Martinovic-Weigelt, D., Ferrey, M., Barber, L.B., Writer, J.H., Rosenberry, D.O., Kiesling, R.L., Lundy, J.R., and Schoenfuss, H.L., 2014, Archives of Environmental Contamination and Toxicology, p. 1-15, doi:10.1007/s00244-014-0052-4.
- Assessing the potential effects of fungicides on nontarget gut fungi (Trichomycetes) and their associated larval black fly hosts: Wilson, E.R., Smalling, K.L., Reilly, T.J., Gray, E., Bond, L., Steele, L., Kandel, P., Chamberlin, A., Gause, J., Reynolds, N., Robertson, I., Novak, S., Feris, K., and White, M.M., 2014, JAWRA Journal of the American Water Resources Association, v. 50, no. 2, p. 420-433, doi:10.1111/jawr.12166.
- Widespread occurrence of neonicotinoid insecticides in streams in a high corn and soybean producing region, USA: Hladik, M.L., Kolpin, D.W., and Kuivila, K.M., 2014, Environmental Pollution, v. 193, p. 189-196, doi:10.1016/j.envpol.2014.06.033.
- Mercury concentrations and distribution in soil, water, mine waste leachates, and air in and around mercury mines in the Big Bend region, Texas, USA: Gray, J.E., Theodorakos, P.M., Fey, D.L., and Krabbenhoft, D.P., 2014, Environmental Geochemistry and Health, doi:10.1007/s10653-014-9628-1 (Advanced Web release).
- Effects of urbanization on mercury deposition and accumulation in New England: Chalmers, A.T., Krabbenhoft, D.P., Van Metre, P.C., and Nilles, M.A., 2014, Environmental Pollution, v. 192, p. 104-112, doi:10.1016/j.envpol.2014.05.003.
- Transcriptomic effects-based monitoring for endocrine active chemicals--Assessing relative contribution of treated wastewater to downstream pollution: Martinović-Weigelt, D., Mehinto, A.C., Ankley, G.T., Denslow, N.D., Barber, L.B., Lee, K.E., King, R.J., Schoenfuss, H.L., Schroeder, A.L., and Villeneuve, D.L., 2014, Environmental Science and Technology, v. 48, no. 4, p. 2385-2394, doi:10.1021/es404027n.
- Methylmercury production in sediment from agricultural and non-agricultural wetlands in the Yolo Bypass, California, USA: Marvin-DiPasquale, M., Windham-Myers, L., Agee, J.L., Kakouros, E., Kieu, L.H., Fleck, J., Alpers, C.N., and Stricker, C., 2014, Science of the Total Environment, v. 484, no. 1, p. 288-299, doi:10.1016/j.scitotenv.2013.09.098.
- Use of natural and applied tracers to guide targeted remediation efforts in an acid mine drainage system, Colorado Rockies, USA: Cowie, R., Williams, M.W., Wireman, M., and Runkel, R.L., 2014, Water (Switzerland), v. 6, no. 4, p. 745-777, doi:10.3390/w6040745.
- Effect of light on biodegradation of estrone, 17β-estradiol, and 17α-ethinylestradiol in stream sediment: Bradley, P.M., and Writer, J.H., 2014, Journal of the American Water Resources Association, v. 50, no. 2, p. 334-342, doi:10.1111/jawr.12157.
- Mercury cycling in agricultural and managed wetlands, Yolo Bypass, California--Spatial and seasonal variations in water quality: Alpers, C.N., Fleck, J.A., Marvin-DiPasquale, M., Stricker, C.A., Stephenson, M., and Taylor, H.E., 2014, Science of the Total Environment, v. 484, no. 1, p. 276-287, doi:10.1016/j.scitotenv.2013.10.096.
- Mercury in the soil of two contrasting watersheds in the eastern United States: Burns, D.A., Woodruff, L.G., Bradley, P.M., and Cannon, W.F., 2014, PLoS ONE, v. 9, no. 2, p. e86855, doi:10.1371/journal.pone.0086855.
- Reconnaissance of pharmaceuticals and wastewater indicators in streambed sediments of the lower Columbia River Basin, Oregon and Washington: Nilsen, E., Furlong, E.T., and Rosenbauer, R., 2014, Journal of the American Water Resources Association, v. 50, no. 2, p. 291-301, doi:10.1111/jawr.12161.
- The Mussel Watch California pilot study on contaminants of emerging concern (CECs)--Synthesis and next steps: Maruya, K.A., Dodder, N.G., Weisberg, S.B., Gregorio, D., Bishop, J.S., Klosterhaus, S., Alvarez, D.A., Furlong, E.T., Bricker, S., Kimbrough, K.L., and Lauenstein, G.G., 2014, Marine Pollution Bulletin, v. 81, no. 2, p. Pages 355-363, doi:10.1016/j.marpolbul.2013.04.023.
- Mercury cycling in agricultural and managed wetlands of California, USA--Experimental evidence of vegetation-driven changes in sediment biogeochemistry and methylmercury production: Windham-Myers, L., Marvin-DiPasquale, M., Stricker, C.A., Agee, J.L., Kieu, L.H., and Kakouros, E., 2014, Science of the Total Environment, v. 484, p. 300-307, doi:10.1016/j.scitotenv.2013.05.028.
- Spatial and temporal patterns of endocrine active chemicals in small streams indicate differential exposure to aquatic organisms: Lee, K.E., Barber, L.B., and Schoenfuss, H.L., 2014, Journal of the American Water Resources Association, v. 50, no. 2, p. 401-419, doi:10.1111/jawr.12162.
- Mercury cycling in agricultural and managed wetlands--A synthesis of methylmercury production, hydrologic export, and bioaccumulation from an integrated field study: Windham-Myers, L., Fleck, J.A., Ackerman, J.T., Marvin-DiPasquale, M., Stricker, C.A., Heim, W.A., Bachand, P.A.M., Eagles-Smith, C.A., Gill, G., Stephenson, M., and Alpers, C.N., 2014, Science of the Total Environment, v. 484, no. 1, p. 221-231, doi:10.1016/j.scitotenv.2014.01.033.
- Refocusing mussel watch on contaminants of emerging concern (cecs)--The California pilot study (2009-10): Maruya, K.A., Dodder, N.G., Schaffner, R.A., Weisberg, S.B., Gregorio, D., Klosterhaus, S., Alvarez, D.A., Furlong, E.T., Kimbrough, K.L., Lauenstein, G.G., and Christensen, J.D., 2014, Marine Pollution Bulletin, v. 81, no. 2, p. 334-339, doi:10.1016/j.marpolbul.2013.04.027.
- Dissipation of contaminants of emerging concern in biosolids applied to nonirrigated farmland in eastern Colorado: Yager, T.J.B., Furlong, E.T., Kolpin, D.W., Kinney, C.A., Zaugg, S.D., and Burkhardt, M.R., 2014, JAWRA Journal of the American Water Resources Association, v. 50, no. 2, p. 343-357, doi:10.1111/jawr.12163.
- Lacustrine responses to decreasing wet mercury deposition rates--Results from a case study in northern Minnesota: Brigham, M.E., Sandheinrich, M.B., Gay, D.A., Maki, R.P., Krabbenhoft, D.P., and Wiener, J.G., 2014, Environmental Science and Technology, doi:10.1021/es500301a (Advanced Web release).
- Glyphosate and its degradation product AMPA occur frequently and widely in U.S. soils, surface water, groundwater, and precipitation: Battaglin, W.A., Meyer, M.T., Kuivila, K.M., and Dietze, J.E., 2014, Journal of the American Water Resources Association, v. 50, no. 2, p. 275-290, doi:10.1111/jawr.12159.
- Featured collection introduction--Contaminants of emerging concern II: Battaglin, W.A., and Kolok, A., 2014, JAWRA Journal of the American Water Resources Association, v. 50, no. 2, p. 261-265, doi:10.1111/jawr.12176.
- Processes of zinc attenuation by biogenic manganese oxides forming in the hyporheic zone of pinal creek, Arizona: Fuller, C.C., and Bargar, J.R., 2014, Environmental Science and Technology, v. 48, no. 4, p. 2165-2172, doi:10.1021/es402576f.
- Mercury and methylmercury stream concentrations in a coastal plain watershed--A multi-scale simulation analysis: Knightes, C.D., Golden, H.E., Journey, C.A., Davis, G.M., Conrads, P.A., Marvin-DiPasquale, M., Brigham, M.E., and Bradley, P.M., 2014, Environmental Pollution, v. 187, p. 182-192, doi:10.1016/j.envpol.2013.12.026.
- Spatial distribution of mercury in southeastern Alaskan streams influenced by glaciers, wetlands, and salmon: Nagorski, S.A., Engstrom, D.R., Hudson, J.P., Krabbenhoft, D.P., Hood, E., Dewild, J.F., and Aiken, G.R., 2014, Environmental Pollution, v. 184, p. 62-72, doi:10.1016/j.envpol.2013.07.040.