What are Health-Based Screening Levels (HBSLs), and how are they different from existing USEPA drinking-water guidelines?
Health-Based Screening Levels (HBSLs) (see USGS Fact Sheet 2005-3059, and the web site, USGS Health Based Screening Levels) are estimates of benchmark concentrations of contaminants in water below which adverse human-health effects are not expected to occur. HBSLs are non-enforceable guidelines that were developed by the U.S. Geological Survey (USGS) in collaboration with the U.S. Environmental Protection Agency (USEPA), the New Jersey Department of Environmental Protection, and the Oregon Health & Science University. HBSLs were calculated for unregulated compounds that do not have USEPA Maximum Contaminant Levels (MCLs) using a consensus approach that entailed (1) standard USEPA Office of Water methodologies (equations) for establishing Lifetime Health Advisory (LHA) and Risk-Specific Dose (RSD) values, and (2) the most current USEPA peer-reviewed, publicly available human-health risk assessments and toxicity information. HBSLs were calculated to supplement existing Federal drinking-w
Related Questions
- What are Health-Based Screening Levels (HBSLs), and how are they different from existing USEPA drinking-water guidelines?
- What are Maximum Contaminant Levels (MCLs) and Health-Based Screening Levels (HBSLs) and how do they differ?
- How is Minwax® Water Based Polyurethane Base Coat different from Minwax® Sanding Sealer?
