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
- Optimizing fish sampling for fish-mercury bioaccumulation factors: Scudder Eikenberry, B.C., Riva-Murray, K., Knightes, C.D., Journey, C.A., Chasar, L.C., Brigham, M.E., and Bradley, P.M., Chemosphere, doi:10.1016/j.chemosphere.2014.12.068 (IN PRESS).
- Hydrogeochemical effects of a bulkhead in the Dinero Mine tunnel, Sugar Loaf Mining District, near Leadville, Colorado: Walton-Day, K., and Mills, T.J., Applied Geochemistry, doi:10.1016/j.apgeochem.2015.03.002 (IN PRESS).
- Total cylindrospermopsins, microcystins/nodularins, and saxitoxins data for the 2007 United States Environmental Protection Agency National Lake Assessment: Loftin, K.A., Dietze, J.E., Meyer, M.T., Graham, J.L., Ziegler, A.C., Maksimowicz, M.M., and Toyne, K.D., U.S. Geological Survey Data Series (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, doi:0.1016/j.apgeochem.2014.06.016 (IN PRESS).
- Biogeochemical aspects of uranium mineralization, mining, milling, and remediation: Campbell, K.M., Gallegos, T.J., and Landa, E.R., 2014, Applied Geochemistry, v. 57, p. 206-235, doi:10.1016/j.apgeochem.2014.07.022.
- Females exceed males in mercury concentrations of burbot Lota lota: Madenjian, C., Stapanian, M., Cott, P., Krabbenhoft, D., Edwards, W., Ogilvie, L., Mychek-Londer, J., and DeWild, J., 2015, Archives of Environmental Contamination and Toxicology, v. 68, no. 4, p. 678-688, doi:10.1007/s00244-015-0131-1.
- Integrated assessment of wastewater treatment plant effluent estrogenicity in the upper Murray River, Australia, using the native Murray rainbowfish (Melanotaenia fluviatilis): Vajda, A.M., Kumar, A., Woods, M., Williams, M., Doan, H., Tolsher, P., Kookana, R.S., and Barber, L.B., 2015, Environmental Toxicology and Chemistry, v. 34, no. 5, p. 1078-1087, doi:10.1002/etc.2895.
- Genes indicative of zoonotic and swine pathogens are persistent in stream water and sediment following a swine manure spill: Haack, S.K., Duris, J.W., Kolpin, D.W., Fogarty, L.R., Johnson, H.E., Gibson, K.E., Focazio, M., Schwab, K.J., Hubbard, L.E., and Foreman, W.T., 2015, Applied and Environmental Microbiology, v. 81, no. 10, p. 3430-3441, doi:10.1128/aem.04195-14.
- Concentrations of hormones, pharmaceuticals and other micropollutants in groundwater affected by septic systems in New England and New York: Phillips, P.J., Schubert, C., Argue, D., Fisher, I., Furlong, E.T., Foreman, W., Gray, J., and Chalmers, A., 2015, Science of the Total Environment, v. 512-513, p. 43-54, doi:10.1016/j.scitotenv.2014.12.067.
- Endocrine disrupting alkylphenolic chemicals and other contaminants in wastewater treatment plant effluents, urban streams, and fish in the Great Lakes and upper Mississippi River regions: Barber, L.B., Loyo-Rosales, J.E., Rice, C.P., Minarik, T.A., and Oskouie, A.K., 2015, Science of the Total Environment, v. 517, p. 195-206, doi:10.1016/j.scitotenv.2015.02.035.
- Mercury distribution and mobility at the abandoned Puhipuhi mercury mine, Northland, New Zealand: Gionfriddo, C.M., Ogorek, J.M., Butcher, M., Krabbenhoft, D.P., and Moreau, J.W., 2015, New Zealand Journal of Geology and Geophysics, v. 58, no. 1, p. 78-87, doi:10.1080/00288306.2014.979840.