Patty Toccalino, Ph.D. (Former Employee)
Science and Products
National Water-Quality Assessment (NAWQA): 1991-2012
In 1991, Congress established the National Water-Quality Assessment (NAWQA) Project to address where, when, why, and how the Nation's water quality has changed, or is likely to change in the future, in response to human activities and natural factors. This page discusses the first two decadal cycles of NAWQA research from 1991 through 2012.
Small Decadal–Scale Changes in Pesticides in Groundwater
U.S. Geological Survey ( USGS) scientists have completed the most comprehensive evaluation to date (2014) of decadal–scale changes in pesticide concentrations in groundwater of the United States. Such assessments are essential for tracking long–term responses to changes in pesticide use and land–management practices.
USGS Health-Based Screening Levels Available Online
A U.S. Geological Survey USGS Health-Based Screening Level ( HBSL) Web site includes human-health benchmarks for 351 contaminants (79 U.S. Environmental Protection Agency ( EPA) Maximum Contaminant Levels ( MCLs), 117 EPA Human Health Benchmarks for Pesticides ( HHBPs), and 155 USGS HBSLs). The Web site also provides detailed toxicity information used to calculate HBSLs. A comprehensive update of...
Science and Products
National Water-Quality Assessment (NAWQA): 1991-2012
In 1991, Congress established the National Water-Quality Assessment (NAWQA) Project to address where, when, why, and how the Nation's water quality has changed, or is likely to change in the future, in response to human activities and natural factors. This page discusses the first two decadal cycles of NAWQA research from 1991 through 2012.
Small Decadal–Scale Changes in Pesticides in Groundwater
U.S. Geological Survey ( USGS) scientists have completed the most comprehensive evaluation to date (2014) of decadal–scale changes in pesticide concentrations in groundwater of the United States. Such assessments are essential for tracking long–term responses to changes in pesticide use and land–management practices.
USGS Health-Based Screening Levels Available Online
A U.S. Geological Survey USGS Health-Based Screening Level ( HBSL) Web site includes human-health benchmarks for 351 contaminants (79 U.S. Environmental Protection Agency ( EPA) Maximum Contaminant Levels ( MCLs), 117 EPA Human Health Benchmarks for Pesticides ( HHBPs), and 155 USGS HBSLs). The Web site also provides detailed toxicity information used to calculate HBSLs. A comprehensive update of...
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government