Watershed monitoring programs depend on water quality characterization data collected for many parameters, at many times and places, and with limited resources. Our objective is to present a strategy that reduces the measured parameters, locations, and frequency without compromising the quality of the monitoring program. One year of twice-monthly (growing season) and monthly (dormant season) wa...

Sequential extraction and radiotracer analyses were used to evaluate the geochemical partitioning of metals (Pb, Cd, Cr, and Cu) in the sediments of Lake Victoria to partition the contribution of catchment areas. Highest total concentration and enrichments of Pb, Cd and Cr occurred near river inlets from polluted urban areas discharging municipal effluents into the rivers. Partitioning coeffici...

Perchlorate salts of potassium and ammonium are the primary oxidants in pyrotechnic mixtures, yet insufficient information is available regarding the relationship between fireworks displays and the environmental occurrence of perchlorate. Here we document changes in perchlorate concentrations in surface water adjacent to a site of fireworks displays from 2004 to 2006. Preceding fireworks displa...

R I C H A R D T . W I L K I N , * , † D E N N I S D . F I N E , ‡ A N D N I C O L E G . B U R N E T T § Office of Research and Development, National Risk Management Research Laboratory, U.S. Environmental Protection Agency, 919 Kerr Research Drive, Ada, Oklahoma 74820, Shaw Environmental and Infrastructure, P.O. Box 1198, Ada, Oklahoma 74821-1198, and College of Medicine, University of Oklahoma...

Endocrine-disrupting chemicals (EDCs) in municipal effluents directly affect the sexual development and reproductive success of fishes, but indirect effects on invertebrate prey or fish predators through reduced predation or prey availability, respectively, are unknown. At the Experimental Lakes Area in northwestern Ontario, Canada, a long-term, whole-lake experiment was conducted using a befor...

Solubility and bioavailability of heavy metals are important with respect to theirtoxicity. The discharge of municipal wastewater in soil and surface waters can affectbioavailability and mobility of heavy metals in soils and sediments. The effect of dischargeof Arak municipal wastewater on the KNO3 and DTPA extractable heavy metals in a salinesoil sampled from Mighan playa (Iran) compared to a ...

Managers of large river basins face conflicting demands for water resources such as wildlife habitat, water supply, wastewater assimilative capacity, flood control, hydroelectricity, and recreation. The Savannah River Basin, for example, has experienced three major droughts since 2000 that resulted in record low water levels in its reservoirs, impacting dependent economies for years. The Savann...

Approximately 9,000 homes in Kenosha have a lead water service line that delivers fresh municipal water from the Kenosha Water Utility’s cast iron or plastic water mains located in public streets and rights of way, into individual homes that is used for drinking, bathing and cleaning. Th ese lead services lines that connect the fresh water mains to more than 9,000 families were installed prior ...

In the semi-arid area of West Texas, drinking water is a precious commodity. Drinking water sources include water from Lake Meredith and groundwater from the Ogallala Aquifer. Water usage in this area includes farming and irrigation, municipal use or cooling water for electricity generation. As population continues to grow and water usage increases, especially during periods of drought, the ava...