Cyanobacterial Harmful Algal Blooms
Algae are natural components of marine and fresh water flora performing many roles that are vital for the health of ecosystems. However, when certain conditions are favorable, algae can rapidly multiply causing "blooms." When blooms (or dense surface scums) are formed, the risk of toxin contamination of surface waters increases especially for some species of cyanobacteria algae with the ability to produce toxins and other noxious chemicals. These are known as cyanobacterial harmful algal blooms (cyanoHABs). Cyanobacteria, also known as blue-green algae, are of special concern because of their potential impacts on drinking and recreational waters.
EPA has compiled information on freshwater cyanoHABs including causes, detection, treatment, health and ecological effects, current research activities in the U.S.; and policies and regulations for cyanotoxins at the state and international levels.
For comments, feedback or additional information, please contact Lesley D'Anglada (Danglada.Lesley@epa.gov), Project Manager, at 202-566-1125.