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Development and Application of Health-Based Screening Levels for Use in Water-Quality Assessments

Scientific Investigations Report 2007-5106

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Abstract

Health-Based Screening Levels (HBSLs) are non-enforceable water-quality benchmarks that were developed by the U.S. Geological Survey in collaboration with the U.S. Environmental Protection Agency (USEPA) and others. HBSLs supplement existing Federal drinking-water standards and guidelines, thereby providing a basis for a more comprehensive evaluation of contaminant-occurrence data in the context of human health. Since the original methodology used to calculate HBSLs for unregulated contaminants was published in 2003, revisions have been made to the HBSL methodology in order to reflect updates to relevant USEPA policies. These revisions allow for the use of the most recent, USEPA peer-reviewed, publicly available human-health toxicity information in the development of HBSLs. This report summarizes the revisions to the HBSL methodology for unregulated contaminants, and updates the guidance on the use of HBSLs for interpreting water-quality data in the context of human health.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Development and Application of Health-Based Screening Levels for Use in Water-Quality Assessments
Series title:
Scientific Investigations Report
Series number:
2007-5106
Edition:
-
Year Published:
2007
Language:
ENGLISH
Publisher:
Geological Survey (U.S.)
Contributing office(s):
National Water Quality Assessment Program, California Water Science Center
Description:
vi, 12 p.