Draft Toxicological Reviews of Cyanobacterial Toxins: Anatoxin-a, Cylindrospermopsin and Microcystins LR, RR, YR and LA

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The U.S. Environmental Protection Agency (EPA) is announcing a forty-five day public comment period and an external peer-review panel meeting to review the external review draft documents entitled, "Toxicological Reviews of Cyanobacterial Toxins: Anatoxin-a, Cylindrospermopsin and Microcystins LR, RR, YR and LA" (NCEA-C-1743, NCEA-C-1763 and NCEA-C-1765). Cyanobacteria, commonly referred to as blue-green algae, are found in freshwater, estuarine and marine environments. Cyanobacteria, other freshwater algae, and their toxins are included as microbial contaminants on EPA's Office of Water (OW) Contaminant Candidate List (CCL). These draft assessments discuss potential human health effects of exposure to these cyanobacterial toxins for four durations--acute, short-term, subchronic and chronic-- focusing on noncancer effects due to oral exposure. The public comment period and the external peer review are separate processes that provide opportunities for all interested parties to comment on these documents. These documents were prepared by EPA's National Center for Environmental Assessment (NCEA) within EPA's Office of Research and Development. EPA will use comments and recommendations