Watershed- and Regional-Scale Contamination
USGS scientists sampling Cynder Pool geyser in the Norris Basin of Yellowstone National Park, Wyoming, for dissolved mercury. Norris Basin is historically known for high sulfur and mercury levels -- from the Effect of Mercury on Aquatic Ecosystems Investigation
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.
- 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.