Integrated Science Assessment for Sulfur Oxides-Health Criteria

EPA is announcing the availability of a final document titled, ``Integrated Science Assessment for Sulfur Oxides--Health Criteria'' (EPA/600/R-17/451). The document was prepared by the National Center for Environmental Assessment (NCEA) within EPA's Office of Research and Development (ORD) as part of the review of the primary (health-based) National Ambient Air Quality Standards (NAAQS) for sulfur oxides (SOX). This Integrated Science Assessment (ISA) provides a comprehensive review, synthesis, and evaluation of the most policy- relevant science to serve as the scientific foundation for EPA's review of the current primary NAAQS for SOX.\1\ EPA is developing a separate ISA as part of an independent review for the secondary (welfare-based) NAAQS for oxides of nitrogen and sulfur. ---------------------------------------------------------------------------