Daniel B. Carr is a professor in the Department of Applied and Engineering Statistics at George Mason University. He previously worked as a senior research scientist and technical working group leader of the Exploratory Data Analysis Group in the Computational Science Department of Battelle Pacific Northwest Laboratories. His research interests include regional data display, statistical graphics for data analysis, exploratory data analysis, cognostics, regression analysis, and life science and physical science applications of statistics. He received a B.A. in mathematics and psychology from Whitman College, an M.Ed. in counseling from Idaho State University, an M.S. in statistics from Oregon State University, and a Ph.D. in statistics from the University of Wisconsin, Madison.

Lorraine L. Janus is deputy chief of Drinking Water Quality Control and director of Watershed Field Operations for the New York City Department of Environmental Protection (NYC DEP). Previously, Dr. Janus was employed as assistant to the senior scientist at the Canada Center for Inland Waters and a senior environmentalist for the South Florida Water Management District. Her professional activities include primary and co-authorship of the Canadian Contribution to the Organisation for Economic Co-operation and Development (OECD) Program on Eutrophication, several NYC DEP reports on phosphorus loading and impacts on water quality, water quality monitoring, and watershed monitoring and protection. She received a B.Sc. in biology and an M.Sc. in limnology from the University of Waterloo and a Ph.D. in limnology from McMaster University.

Judith L. Meyer is a research professor in the Institute of Ecology and director for science of the River Basin Science and Policy Center at the University of Georgia. Her expertise is in aquatic ecology, especially nutrient cycling in streams, the role of riparian zones in controlling nonpoint source pollution, and the effects of land-cover changes on stream biodiversity. She has served on several NRC committees and is a former member of the Water Science and Technology Board. She received a B.S. from the University of Michigan, an M.S. from the University of Hawaii, and a Ph.D. in ecology and evolutionary biology from Cornell University.

Kenneth H. Reckhow is a professor of water resources at Duke University and is the director of the University of North Carolina Water Resources Research Institute. Dr. Reckhow’s research interests focus on the development, evaluation, and application of models for the management of water quality. In particular, he is interested in the effect of uncertainty on model specification, parameter estimation, and model applications. Recent work has expanded this theme to consider the effect of scientific uncertainties on water quality decision making. He recently chaired the NRC Committee to Assess the Scientific Basis of the Total Maximum Daily Load Approach to Water Pollution Reduction. Dr. Reckhow